RYAN MICHAEL HOLTHAUS M.D.
NPI 1609822873
Radiology - Diagnostic Radiology in Mason City, IA

Q: What is Ryan Holthaus's NPI number?

The NPI number for Ryan Holthaus is 1609822873. It was assigned to this individual provider in the NPPES registry on May 26, 2006.

Q: What is Ryan Holthaus's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Q: When was this NPI record last updated?

The NPPES record for Ryan Holthaus was last updated on March 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 26, 2006PECOS Enrolled

92.22/100

CMS Quality Rating

1010 4TH ST SW, SUITE 100, MASON CITY, IA 50401(641) 424-0102(641) 424-8059 Get Directions Write a Review

NPPES record last updated: March 11, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 11, 2025, Feb 24, 2021 (2 updates tracked since 2021).

On this page

About Ryan Michael Holthaus M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

RYAN MICHAEL HOLTHAUS M.D. (NPI 1609822873) is an individual diagnostic radiology provider in Mason City, Iowa, licensed in Iowa (36598) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Mercyone North Iowa Medical Center, and maintains 7 additional practice locations.

NPPES Registry Identity

NPI1609822873

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameRYAN MICHAEL HOLTHAUSCredential: M.D.

Location Address1010 4TH ST SW, SUITE 100Mason City, IA 50401-2857

Mailing Address1416 6th St SwMason City, IA 50401-4818 · (641) 424-0102 · Fax (641) 424-8059

Phone(641) 424-0102

Fax(641) 424-8059

Sole ProprietorNo

Medical School CMSUniversity Of Iowa, Rj & L Carver College Of MedicineGraduated 2001

Enumeration DateMay 26, 2006

Last NPPES UpdateMarch 11, 20252 updates tracked since enumeration

NPPES CertifiedMarch 11, 2025

✔ NPI 1609822873 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

License✔ Licensed in IA · 36598

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

1010 4TH ST SW, Mason City, IA 50401

Open in Google Maps ↗

Secondary Practice Locations 7

Location 11924 Superior StWebster City, IA 50595-3146 · Phone (844) 474-4321 · Fax (515) 832-1114

Location 21316 S Main StClarion, IA 50525-2019 · Phone (444) 744-3218 · Fax (515) 532-3119

Location 3104 S Story StBoone, IA 50036-4737 · Phone (844) 474-4321 · Fax (515) 432-2895

Location 42700 1st Ave SFort Dodge, IA 50501-4300 · Phone (844) 474-4321 · Fax (515) 576-8581

Location 5401 S 17th StClear Lake, IA 50428-2304 · Phone (844) 474-4321 · Fax (515) 832-1400

Location 6840 W US Highway 18Garner, IA 50438-1023 · Phone (844) 474-4321 · Fax (641) 925-1507

Location 7403 1st St SEBelmond, IA 50421-1201 · Phone (844) 474-4321 · Fax (641) 444-5554

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Insurance Company, Wellmark Health Plan of Iowa, Inc..Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ryan Michael Holthaus M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2567462690

PECOS Enrollment IDI20070112000449

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Ryan Holthaus reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Radiologists Of North Iowa PC

Same address

Diagnostic Radiology

1010 4TH ST SW, SUITE 100
Mason City, IA 50401

Reassigned Medicare billing, Iowa enrollment
18 clinicians in this Medicare group

NPI 1942252051 (641) 424-0102

Allen Memorial Hospital Corporation

62 mi

Women's Health

233 VOLD DR
Waterloo, IA 50703

Reassigned Medicare billing, Iowa enrollment
273 clinicians in this Medicare group

NPI 1891772927 (319) 235-5090

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 56

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

X-ray of chest, 1 view 71045

A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.

250 services194 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

169 services168 patients

Ultrasound study of arm and leg arteries 93922

An ultrasound study of arm and leg arteries is a non-invasive procedure that uses sound waves to create images of your arteries. It helps in checking blood flow, identifying blockages, or detecting other abnormalities in your arteries.

120 services113 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.

83 services82 patients

Ultrasound study of arm or leg veins with compression and maneuvers 93970

An ultrasound study of arm or leg veins with compression and maneuvers is a non-invasive procedure that uses sound waves to create images of your veins. This helps identify blood clots or other vein problems. During the procedure, pressure is applied to the veins and certain movements are performed to assess blood flow.

80 services80 patients

Ultrasound of leg arteries or artery grafts 93925

An ultrasound of leg arteries or artery grafts is a non-invasive imaging test. It uses high-frequency sound waves to capture live images from inside your body, specifically your leg arteries or grafts. This helps in detecting any blockages or abnormalities.

71 services69 patients

Fluoroscopic guidance for insertion or removal of central vein access device 77001

Fluoroscopic guidance for central vein access device insertion or removal is a procedure where a special X-ray, called a fluoroscope, is used to help accurately place or remove a device in a central vein. This device aids in delivering medications or collecting blood samples.

66 services58 patients

Ultrasonic guidance for blood vessel access 76937

Ultrasonic guidance for blood vessel access is a medical procedure where sound waves are used to create images of your blood vessels. This helps doctors to accurately locate and access the vessels for treatments or tests, ensuring safety and precision.

60 services60 patients

Ct scan of abdomen and pelvis with contrast 74177

A CT scan of the abdomen and pelvis with contrast is an imaging procedure. A special dye, called contrast, is used to make certain areas more visible. This can help identify issues such as infections, tumors, or other abnormalities. The procedure is painless and usually takes about 30 minutes.

58 services58 patients

Ultrasound of both sides of head and neck blood flow 93880

An ultrasound of the head and neck blood flow is a safe, non-invasive procedure that uses sound waves to create images of blood vessels. It helps detect abnormalities like blockages or clots, ensuring optimal blood flow.

57 services57 patients

Ultrasound of one leg arteries or artery grafts 93926

An ultrasound of leg arteries or artery grafts is a non-invasive test using sound waves to create images of your blood vessels. This helps doctors assess blood flow, identify blockages, and monitor the health of grafts.

56 services49 patients

Drainage of fluid from abdominal cavity using imaging guidance 49083

This procedure involves removing excess fluid from your abdominal cavity, which can relieve discomfort. A specialist uses imaging technology to guide a thin needle into the right spot. The fluid is then drained out safely.

50 services17 patients

Aspiration of fluid from chest cavity using imaging guidance 32555

This procedure, known as a thoracentesis, involves removing fluid from the space between the lungs and chest wall, called the pleural space. It's performed under imaging guidance to ensure precision. It can help diagnose conditions or relieve symptoms like shortness of breath.

45 services37 patients

Complete ultrasound scan behind abdominal cavity 76770

A complete ultrasound scan behind the abdominal cavity is a non-invasive imaging procedure. It uses sound waves to create pictures of the structures and organs located at the back of your abdomen. It helps in diagnosing health conditions and monitoring ongoing treatments.

38 services38 patients

Ct scan of chest without contrast 71250

A CT scan of the chest without contrast is a non-invasive imaging procedure. It uses special X-ray equipment to produce detailed images of your chest area, including your lungs and heart. It can help diagnose conditions such as lung diseases or heart disorders. It doesn't involve any dyes or contrast agents.

36 services36 patients

X-ray of lower and sacral spine, 2-3 views 72100

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

35 services34 patients

Ct scan of abdominal aorta and both leg arteries with contrast 75635

A CT scan of the abdominal aorta and both leg arteries with contrast is a medical imaging procedure. A special dye is injected to make your blood vessels visible on the scan. This helps to check for any blockages or abnormalities in these areas.

35 services33 patients

Ct scan of chest with contrast 71260

A CT scan of the chest with contrast is an imaging procedure. A special dye (contrast) is used to highlight specific areas in your body, providing clearer pictures of your chest. This helps in diagnosing conditions related to your lungs, heart, and other chest structures.

34 services34 patients

Core needle biopsy of lung or center cavity of chest (mediastinum), accessed through skin 32408

A core needle biopsy of the lung or mediastinum is a procedure where a small sample of tissue is collected using a needle inserted through the skin. This helps in diagnosing lung conditions or diseases in the chest's central cavity. It's a safe and minimally invasive process.

32 services31 patients

Ct scan head or brain without contrast 70450

A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.

31 services31 patients

Ct scan of blood vessels of abdomen and pelvis with contrast 74174

A CT scan of the abdomen and pelvis with contrast is a medical imaging procedure. A special dye, called contrast, is used to make blood vessels more visible. The scan produces detailed images of your abdomen and pelvis, helping doctors to diagnose conditions or plan treatments.

31 services30 patients

Ultrasonic guidance for needle placement 76942

Ultrasonic guidance for needle placement is a technique where sound waves create images that help accurately position the needle during procedures. This method ensures precision, minimizes discomfort, and increases safety.

31 services30 patients

X-ray of lower and sacral spine, minimum of 4 views 72110

An X-ray of the lower and sacral spine involves capturing images of your lower back and tailbone area. It helps in identifying issues like fractures, arthritis, or other abnormalities. At least four different angles or 'views' are taken to get a comprehensive picture.

29 services29 patients

Low dose ct scan of chest for lung cancer screening 71271

A low-dose CT scan of the chest is a quick, painless procedure that uses a small amount of radiation to create detailed images of your lungs. It's a key tool for early detection of lung cancer, especially for those at high risk.

28 services28 patients

X-ray of knee, 1-2 views 73560

An X-ray of the knee with 1-2 views is a quick, painless test that produces images of the knee bones. It helps identify fractures, infections, or changes in the knee joint. During the procedure, you'll be asked to stay still while the X-ray machine captures the images.

28 services28 patients

X-ray of foot, minimum of 3 views 73630

An X-ray of the foot, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones and tissues in your foot. This helps to identify fractures, infections, or other abnormalities. Multiple views ensure a comprehensive examination.

27 services25 patients

Ultrasound scan of abdominal aorta 76706

An ultrasound scan of the abdominal aorta is a non-invasive imaging test. It uses sound waves to create pictures of the main blood vessel in your abdomen, the aorta, to check its size and shape. This helps detect any abnormalities or issues early.

27 services27 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

26 services26 patients

Imaging guidance for procedure, 60 minutes or less 76000

Imaging guidance is a procedure where real-time images are used to direct medical tools during a treatment. This technique helps to improve accuracy and safety. The procedure typically lasts 60 minutes or less.

25 services23 patients

Insertion of tunneled central venous tube for infusion (5 years or older) 36558

The insertion of a tunneled central venous tube is a procedure where a thin, flexible tube is placed into a large vein, usually in the neck or chest. This tube allows healthcare providers to give medications, fluids, or nutrients directly into your bloodstream over a longer period.

24 services24 patients

Replacement of kidney drainage tube using imaging guidance with review by radiologist 50435

This procedure involves replacing an existing kidney drainage tube. Using imaging technology, a radiologist precisely guides the process to ensure accuracy. This helps drain excess fluid from kidneys, improving their function and your comfort.

24 services11 patients

Ct scan of blood vessels of chest with contrast 71275

A CT scan of the chest with contrast is a non-invasive imaging test. It uses X-rays and a special dye to get detailed images of your blood vessels in the chest. This helps in diagnosing conditions related to heart and lungs.

24 services24 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

23 services23 patients

Fine needle aspiration biopsy using ultrasound guidance, first growth 10005

Fine needle aspiration biopsy with ultrasound guidance is a procedure where a thin needle is inserted into a growth to extract a small sample. Ultrasound helps accurately locate the growth. This sample is then analyzed to determine the nature of the growth.

21 services21 patients

Insertion of central venous tube with port (5 years or older) 36561

A central venous tube with port is a small, flexible tube inserted into a large vein, usually in the chest. It allows for easy administration of medication, fluids, or blood products over a long period. A port is attached under the skin for easy access. It's safe for individuals aged 5 and above.

21 services21 patients

Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist 36902

This procedure involves inserting a needle or tube into your hemodialysis circuit, a system that cleans your blood when your kidneys can't. A balloon is then used to widen a narrow section of this circuit. A radiologist reviews the procedure to ensure accuracy.

19 services14 patients

X-ray of abdomen, 1 view 74018

An X-ray of the abdomen, 1 view, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the structures in your abdomen, such as the stomach, liver, and intestines. This can help identify issues like blockages, infections, or injuries.

19 services18 patients

Injection of contrast through abdominal cavity tube for x-ray study 49424

This procedure involves injecting a contrast substance through a tube in your abdominal cavity. This helps to highlight certain areas in your body for an X-ray study. It's a crucial step for accurate diagnosis and treatment planning.

18 services14 patients

Review by radiologist of abscess or sinus cavity study 76080

This procedure involves a specialist, known as a radiologist, examining images of your abscess or sinus cavity. These images help identify any problems or changes in your condition. The radiologist's review is crucial in determining the best course of treatment.

18 services14 patients

Ultrasound scan of head and neck soft tissue 76536

An ultrasound scan of the head and neck soft tissue is a non-invasive procedure that uses sound waves to create images of the soft tissues in these areas. It helps identify any abnormalities or issues, such as tumors, cysts, or infections. It's painless and doesn't involve radiation.

18 services18 patients

X-ray of wrist, minimum of 3 views 73110

An X-ray of the wrist, minimum of 3 views, is a diagnostic procedure that uses radiation to create images of your wrist from different angles. This helps detect fractures, infections, or other abnormalities for accurate diagnosis and treatment planning.

17 services17 patients

Review by radiologist of ct guidance for needle placement 77012

This process involves a radiologist examining CT scan images to accurately guide a needle's placement within the body. This technique is often used for biopsies or treatments, ensuring precision and safety.

17 services17 patients

Complete ultrasound of abdomen and pelvis artery and vein blood flow 93975

This procedure uses sound waves to create images of your abdomen and pelvis, specifically focusing on the arteries and veins. It helps in assessing the blood flow and detecting any abnormalities, ensuring your overall well-being.

17 services17 patients

Injection of bile duct for x-ray through already existing skin access using imaging guidance with review by radiologist 47531

This procedure involves injecting a contrast agent into your bile duct through an existing skin access point. The contrast helps highlight the duct on X-rays. A radiologist uses imaging guidance to ensure correct placement and reviews the images afterwards for any abnormalities.

16 services11 patients

Injection of substance into lower spine canal using imaging guidance 62323

This procedure involves injecting a substance into your lower spine canal, guided by real-time images. It's done to diagnose or treat various conditions. You may feel slight discomfort, but it's generally safe and can provide valuable information for your treatment plan.

16 services14 patients

X-ray of knee, 4 or more views 73564

An X-ray of the knee, 4 or more views, is a non-invasive imaging test. It involves capturing multiple images of your knee from different angles. This helps in diagnosing conditions such as fractures, arthritis, or infections. The procedure is quick and painless.

15 services14 patients

X-ray of ankle, minimum of 3 views 73610

An ankle X-ray is a quick, painless imaging test. It involves capturing at least three different images or 'views' of your ankle using small amounts of radiation. These images help identify any abnormalities or injuries, such as fractures or arthritis.

15 services14 patients

Ct scan of abdomen and pelvis without contrast 74176

A CT scan of the abdomen and pelvis is a non-invasive medical test. It uses special X-ray equipment to create detailed images of your abdominal and pelvic areas. This helps doctors examine organs, tissues, and vessels. No contrast dye is used in this procedure.

15 services15 patients

Ct scan of blood vessels and grafts of heart with contrast 75574

A CT scan of the heart's blood vessels and grafts with contrast is a diagnostic test. A special dye (contrast) is injected into your veins, which helps create clear images of your heart's vessels and grafts. This helps doctors detect blockages or other abnormalities.

15 services15 patients

Limited ultrasound scan of abdomen 76705

A limited ultrasound scan of the abdomen is a non-invasive imaging test. It uses sound waves to produce images of the abdominal organs such as the liver, gallbladder, spleen, pancreas, and kidneys. This helps to identify any abnormalities or issues.

15 services15 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

15 services13 patients

Removal of tunneled central venous tube 36589

A tunneled central venous tube removal is a procedure to take out a long, thin tube that was previously placed in a large vein in your body. This tube helps deliver medication or nutrition. The removal is usually quick and done under local anesthesia.

14 services14 patients

Ultrasound of leg arteries at rest and after exercise 93924

An ultrasound of leg arteries at rest and after exercise involves using sound waves to create images of the blood vessels in your legs. This helps to detect blockages or narrowing. You'll rest, then perform light exercise, and images are taken before and after to compare blood flow.

13 services13 patients

X-ray of upper spine, 4-5 views 72050

An X-ray of the upper spine with 4-5 views is a non-invasive imaging test. It uses radiation to capture detailed images of the bones and structures in your neck and upper back. This procedure helps identify issues like fractures, infections, or deformities.

12 services12 patients

X-ray of middle spine, 2 views 72070

An X-ray of the middle spine, or thoracic spine, involves capturing two different images of the area. This non-invasive procedure uses small amounts of radiation to visualize the bones and tissues in your back, helping to identify any abnormalities or injuries.

12 services11 patients

Complete ultrasound of aorta, vena cava, groin vessels or bypass grafts 93978

This procedure involves using sound waves to create images of your aorta, vena cava, groin vessels, or bypass grafts. It helps to detect abnormalities or blockages, ensuring your blood flows smoothly. It's painless and non-invasive.

11 services11 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mercyone North Iowa Medical Center

Acute Care Hospitals · Mason City, IA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number160064

Location1000 Fourth Street SWMason City, IA 50401 · Cerro Gordo County

Emergency services Birthing friendly

Allen Hospital

Acute Care Hospitals · Waterloo, IA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number160110

Location1825 Logan AvenueWaterloo, IA 50703 · Black Hawk County

Emergency services Birthing friendly

Hancock County Health System

Critical Access Hospitals · Britt, IA

OwnershipGovernment - Local

CMS Certification Number161307

Location532 1st St NWBritt, IA 50423 · Hancock County

Emergency services

Mitchell County Regional Health

Critical Access Hospitals · Osage, IA

OwnershipGovernment - Local

CMS Certification Number161323

Location616 North Eighth StreetOsage, IA 50461 · Mitchell County

Emergency services

Kossuth Regional Health Center

Critical Access Hospitals · Algona, IA

1/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number161353

Location1515 South Phillips StreetAlgona, IA 50511 · Kossuth County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 50401 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$81.84 typical visit price

range $52.96 – $161.40

Typical copayment $20.46 (range $13.24 – $40.35)

Most-billed visit code 99203

Established Patient

$66.36 typical visit price

range $16.91 – $131.98

Typical copayment $16.59 (range $4.22 – $32.99)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

92.22/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

95.03

Improvement Activities

Cost

80.69

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LAURA SPICER

Pharmacist

1010 4TH ST SW
MASON CITY, IA 50401

Cerro Gordo County (641) 422-6105

DR. CHAD M MCCAMBRIDGE MD

Family Medicine

1010 4TH ST SW, SUITE 340
MASON CITY, IA 50401

Cerro Gordo County (641) 428-7766

SIDDHARTH VERMA DO

Student in an Organized Health Care Education/Training Program

1010 4TH ST SW, STE 305
MASON CITY, IA 50401

Cerro Gordo County (641) 428-5700

LUAN M BARGMAN PA

Physician Assistant

1010 4TH ST SW, SUITE 120
MASON CITY, IA 50401

Cerro Gordo County (641) 428-6020

MAGNETIC RESONANCE SERVICES PTR

Clinic/Center (Magnetic Resonance Imaging (MRI))

1010 4TH ST SW, SUITE 100
MASON CITY, IA 50401

Cerro Gordo County (641) 424-0102

WILLIAM D MATTHEWS M.D.

Radiology (Diagnostic Radiology)

1010 4TH ST SW, SUITE 100
MASON CITY, IA 50401

Cerro Gordo County (641) 424-0102

MR. TONY GENE PALS PHARMD

Pharmacist

1010 4TH ST SW
MASON CITY, IA 50401

Cerro Gordo County (641) 422-6105

DANIEL MICHELSON MD

Student in an Organized Health Care Education/Training Program

1010 4TH ST SW, STE 340
MASON CITY, IA 50401

Cerro Gordo County (641) 428-7766

MAX VOSS DO

Student in an Organized Health Care Education/Training Program

1010 4TH ST SW, STE 340
MASON CITY, IA 50401

Cerro Gordo County (641) 428-7766

ROBERTO E VELEZ-ROSADO MD

Obstetrics & Gynecology

1010 4TH ST SW, SUITE 32
MASON CITY, IA 50401

Cerro Gordo County (641) 422-2100

NORTH IOWA MERCY CLINICS

Nurse Practitioner (Family)

1010 4TH ST SW, SUITE 32
MASON CITY, IA 50401

Cerro Gordo County (641) 428-5100

PAUL H GORDON MD

Emergency Medicine

1010 4TH ST SW
MASON CITY, IA 50401

Cerro Gordo County (641) 422-6020

JOHN SWEGLE PHARMD

Pharmacist (Ambulatory Care)

1010 4TH ST SW
MASON CITY, IA 50401

Cerro Gordo County (641) 428-7182

AMBER ALBERTS MD

Student in an Organized Health Care Education/Training Program

1010 4TH ST SW, SUITE 340
MASON CITY, IA 50401

Cerro Gordo County (641) 428-7766

CHARLES A DEBRAH MD

Obstetrics & Gynecology

1010 4TH ST SW, SUITE 32
MASON CITY, IA 50401

Cerro Gordo County (641) 428-5100

NEUROSURGERY OF NORTH IOWA, P.C.

Neurological Surgery

1010 4TH ST SW, SUITE 105
MASON CITY, IA 50401

Cerro Gordo County (641) 422-7847

JESSIE DAVIS MD

Family Medicine

1010 4TH ST SW, SUITE 340
MASON CITY, IA 50401

Cerro Gordo County (641) 428-7766

IGNATIUS ALDEN MD

Student in an Organized Health Care Education/Training Program

1010 4TH ST SW, STE 305
MASON CITY, IA 50401

Cerro Gordo County (641) 428-5700

JEANA LYNN PETREE M.D.

Radiology (Diagnostic Radiology)

1010 4TH ST SW, SUITE 100
MASON CITY, IA 50401

Cerro Gordo County (641) 424-0102

JAMES K CODDINGTON MD

Family Medicine

1010 4TH ST SW
MASON CITY, IA 50401

Cerro Gordo County (641) 422-3020

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ryan Holthaus's NPI number?

The NPI number for Ryan Holthaus is 1609822873. It was assigned to this individual provider in the NPPES registry on May 26, 2006.

Where is Ryan Holthaus located?

Ryan Holthaus practices at 1010 4th St SW Suite 100, Mason City, IA 50401. The listed phone number is (641) 424-0102.

What is Ryan Holthaus's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Ryan Holthaus enrolled in Medicare?

Yes. Ryan Holthaus is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Ryan Holthaus's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ryan Holthaus reassigns Medicare benefits to 2 organizations: Radiologists Of North Iowa PC (Mason City, IA) and Allen Memorial Hospital Corporation (Waterloo, IA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ryan Holthaus's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ryan Holthaus accept?

Health plans from Oscar Insurance Company and Wellmark Health Plan of Iowa, Inc. list Ryan Holthaus as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Ryan Holthaus affiliated with any hospitals?

According to CMS data, Ryan Holthaus is affiliated with Mercyone North Iowa Medical Center, Allen Hospital, Hancock County Health System, Mitchell County Regional Health and Kossuth Regional Health Center.

When was this NPI record last updated?

The NPPES record for Ryan Holthaus was last updated on March 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.