Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. IAN ALEXANDER MONAST DO
NPI 1780033241
Radiology - Diagnostic Radiology in Saint Louis, MO

Q: What is Ian Monast's NPI number?

The NPI number for Ian Monast is 1780033241. It was assigned to this individual provider in the NPPES registry on June 6, 2016.

Q: What is Ian Monast'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 Ian Monast was last updated on October 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 33 days 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 June 06, 2016PECOS EnrolledAccepts Medicare Assignment

510 S KINGSHIGHWAY BLVD, DEPT RADIOLOGY, SAINT LOUIS, MO 63110(314) 362-7200(314) 747-4189 Get Directions Write a Review

NPPES record last updated: October 5, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 5, 2026, Dec 11, 2025, Nov 15, 2021 and 2 more (5 updates tracked since 2021).

On this page

About Dr. Ian Alexander Monast Do NPPES

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

DR. IAN ALEXANDER MONAST DO (NPI 1780033241) is an individual diagnostic radiology provider in Saint Louis, Missouri, licensed in New York (333028) and active in the NPI registry since June 2016. He is enrolled in Medicare PECOS, is affiliated with St Mary's Healthcare, and maintains a secondary practice location in Paoli.

NPPES Registry Identity

NPI1780033241

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameDR. IAN ALEXANDER MONASTCredential: DO

Location Address510 S KINGSHIGHWAY BLVD, DEPT RADIOLOGYSaint Louis, MO 63110-1016

Mailing Address660 S Euclid Ave, Cb 8131Saint Louis, MO 63110-1010 · (314) 362-7200 · Fax (314) 747-4189

Phone(314) 362-7200

Fax(314) 747-4189

Sole ProprietorNo

Medical School CMSKansas City University Of Med & Biosciences, College Of Osteo MedGraduated 2016

Enumeration DateJune 6, 2016

Last NPPES UpdateOctober 5, 20265 updates tracked since enumeration

NPPES CertifiedOctober 5, 2026

✔ NPI 1780033241 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

Licenses✔ Licensed in NY · 333028✔ Licensed in MO · 2021015241✔ Licensed in PA · OS024321

Definition

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

510 S KINGSHIGHWAY BLVD, Saint Louis, MO 63110

Open in Google Maps ↗

Secondary Practice Location 1

Location 1255 W Lancaster AvePaoli, PA 19301-1763 · Phone (484) 337-1644

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Ian Alexander Monast Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3274896675

PECOS Enrollment IDI20220823002077, I20241210001467, I20251218000153

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 Ian Monast reassigns Medicare billing to 13 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Clinical Radiologists, S.C.

87 mi

Diagnostic Radiology

701 N 1ST ST
Springfield, IL 62781

Reassigned Medicare billing, Illinois enrollment
Medicare enrollment name: Clinical Radiologists Sc
35 clinicians in this Medicare group

NPI 1063469252 (217) 788-3245

Radiology Alliance PC

256 mi

Diagnostic Radiology

210 25TH AVE N STE 602
Nashville, TN 37203

Reassigned Medicare billing, Illinois enrollment
20 clinicians in this Medicare group

NPI 1861478489 (615) 312-0600

Adi Radiology PC

267 mi

Diagnostic Radiology

4321 CAROTHERS PKWY
Franklin, TN 37067

Reassigned Medicare billing, Illinois enrollment
9 clinicians in this Medicare group

NPI 1083266761 (615) 851-6033

Allegheny Clinic Radiology

564 mi

Diagnostic Radiology

320 E NORTH AVE
Pittsburgh, PA 15212

Reassigned Medicare billing, Pennsylvania enrollment
160 clinicians in this Medicare group

NPI 1992183164 (412) 359-8743

Medical X-Ray Consultants, Ltd

564 mi

Vascular & Interventional Radiology

111 17TH AVE E
Alexandria, MN 56308

Reassigned Medicare billing, Illinois enrollment
15 clinicians in this Medicare group

NPI 1386601383 (715) 295-9431

Imaging Associates Of Michigan PLLC

565 mi

Diagnostic Radiology

850 W BARAGA AVE
Marquette, MI 49855

Reassigned Medicare billing, Illinois enrollment
27 clinicians in this Medicare group

NPI 1164943007 (906) 214-2900

Chautauqua Medical Practice, P.C.

623 mi

Family Medicine

4936 MAIN ST
Bemus Point, NY 14712

Reassigned Medicare billing, New York enrollment
Medicare enrollment name: Chautauqua Medical Practice PC
154 clinicians in this Medicare group

NPI 1922181767 (716) 386-2414

Niagara Frontier Radiologic Associates PC

665 mi

Diagnostic Radiology

5300 MILITARY RD
Lewiston, NY 14092

Reassigned Medicare billing, Illinois enrollment
2 clinicians in this Medicare group

NPI 1225120850 (716) 297-4800

Trinity Medical Wny PC

665 mi

Internal Medicine

144 GENESSE STREET
Buffalo, NY 14203

Reassigned Medicare billing, New York enrollment
332 clinicians in this Medicare group

NPI 1295043149 (716) 206-1503

Sra Medical Imaging LLC

667 mi

Diagnostic Radiology

2157 MAIN ST
Buffalo, NY 14214

Reassigned Medicare billing, Illinois enrollment
5 clinicians in this Medicare group

NPI 1881920452 (716) 862-1000

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 45

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.

Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml Q9967

Low osmolar contrast material with 300-399 mg/ml iodine concentration is a diagnostic tool used in imaging procedures. It helps to enhance the visibility of specific areas in the body, aiding in accurate diagnosis. It's safe and generally well-tolerated by patients.

5,190 services52 patients

Injection, gadoterate meglumine, 0.1 ml A9575

Gadoterate meglumine is a contrast agent used in MRI scans to help visualize certain areas of your body more clearly. It's injected into your bloodstream, typically through a vein in your arm, and helps doctors get more detailed images.

2,635 services16 patients

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.

510 services460 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.

355 services341 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.

155 services153 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.

133 services132 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.

127 services124 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.

107 services105 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.

85 services85 patients

Ct scan of upper spine without contrast 72125

A CT scan of the upper spine without contrast is a non-invasive imaging test that uses X-rays to capture detailed images of your neck and upper back. It helps in identifying issues like fractures, tumors, or infections. No dye (contrast) is used in this scan.

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.

72 services72 patients

Dxa bone density measurement of hip, pelvis, spine 77080

A DXA bone density measurement is a simple, quick, and non-invasive procedure that assesses the strength of your bones. This test uses X-rays to measure the amount of minerals, mainly calcium, in the hip, pelvis, and spine. It helps in early detection of osteoporosis or other bone diseases.

58 services58 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.

51 services50 patients

Ct scan of blood vessels of neck with contrast 70498

A CT scan of the neck's blood vessels with contrast is a diagnostic procedure. It uses X-rays and a special dye to create detailed images of your neck's blood vessels. This helps doctors detect issues such as blockages or abnormalities.

50 services50 patients

Ct scan of blood vessels of head with contrast 70496

A CT scan of the head's blood vessels with contrast is a diagnostic procedure. A special dye (contrast) is injected into your body to make the blood vessels visible on the scan. This helps identify issues like blockages or abnormalities in your head's blood vessels.

47 services47 patients

Mri scan of brain without contrast 70551

An MRI scan of the brain without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your brain. It helps in detecting abnormalities like tumors, stroke, inflammation, or infection.

45 services45 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.

44 services41 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.

42 services42 patients

Nuclear medicine study from skull base to mid-thigh with ct scan 78815

A nuclear medicine study from skull base to mid-thigh with a CT scan involves using a small amount of radioactive material and CT imaging to examine body tissues and organs. This helps detect any abnormalities by providing detailed images of the body's internal structure.

39 services39 patients

Imaging for evaluation of swallowing function 74230

This process, known as a swallowing study, uses imaging technology to view how food and liquid move from your mouth to your stomach. It helps identify any issues you may have swallowing, which can be crucial for determining the best treatment plan.

38 services38 patients

Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries A9552

Fluorodeoxyglucose F-18 FDG is a radioactive drug used in PET scans. It helps doctors see how your tissues and organs are functioning. The drug is given in a specific dose, up to 45 millicuries, depending on your body size and the type of scan.

38 services38 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.

32 services32 patients

Ct scan of chest without contrast 71250

30 services30 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.

30 services30 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.

29 services29 patients

X-ray of knee, 3 views 73562

An X-ray of the knee, 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the knee from three different angles. This helps medical professionals to diagnose and monitor conditions like arthritis, fractures, or infections. The process is quick and painless.

29 services24 patients

Ct scan of chest with contrast 71260

28 services27 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.

23 services23 patients

Ct scan of lower spine without contrast 72131

A CT scan of the lower spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed images of your lower back area, helping to detect conditions like fractures, infections, or tumors. It's painless and generally quick.

23 services23 patients

Limited ultrasound scan behind abdominal cavity 76775

A limited ultrasound scan behind the abdominal cavity is a non-invasive imaging method that helps visualize structures in the back of your abdomen. This procedure uses sound waves to create pictures of these areas, assisting in diagnosing certain conditions.

23 services23 patients

Mri scan of brain before and after contrast 70553

An MRI scan of the brain, both before and after contrast, helps visualize different brain structures. Initially, images are taken without a contrast agent. Then, a safe dye is injected which helps highlight certain areas, providing clearer, more detailed images.

22 services21 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.

22 services22 patients

Nuclear medicine study of lung circulation 78580

A nuclear medicine study of lung circulation involves the use of a safe, radioactive substance to visualize lung function. It helps in diagnosing conditions like blood clots. The substance is injected and images are taken to study the blood flow in your lungs.

21 services21 patients

Ct scan of abdomen and pelvis with contrast 74177

19 services19 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.

18 services18 patients

X-ray of hand, minimum of 3 views 73130

An X-ray of the hand, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones in your hand from different angles. This helps in diagnosing fractures, infections, arthritis, or other abnormalities. It's quick and painless.

18 services15 patients

3d radiographic procedure 76376

A 3D radiographic procedure is a non-invasive imaging test that helps doctors visualize the internal structures of your body in three dimensions. This advanced technology provides detailed images, aiding in accurate diagnosis and treatment planning. It involves exposure to minimal radiation.

16 services16 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.

16 services16 patients

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

14 services14 patients

X-ray of ribs on side of body, minimum of 3 views 71101

This is a diagnostic procedure where a machine emits a small amount of radiation to capture images of your ribs from at least three different angles. It helps to identify issues like fractures or infections. It's a quick, painless process.

13 services13 patients

X-ray of pelvis, 1-2 views 72170

An X-ray of the pelvis, 1-2 views, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the lower part of your torso. These images help to detect any abnormalities or injuries in your hip bones and surrounding structures.

13 services13 patients

Ct scan of leg without contrast 73700

A CT scan of the leg is a non-invasive imaging test that uses X-rays to capture detailed images of your leg's bones, muscles, and blood vessels. It doesn't use contrast dye and doesn't cause any pain. It helps in diagnosing injuries or diseases.

13 services12 patients

Nuclear medicine study of bone and/or joint whole body 78306

A nuclear medicine study of bone and/or joint whole body involves injecting a small amount of radioactive material into your body. This material travels to your bones and emits energy. A special camera captures this energy, creating images of your bones to help identify any abnormalities.

12 services12 patients

Ultrasound of both sides of head and neck blood flow 93880

12 services12 patients

Mri scan of lower spinal canal without contrast 72148

An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.

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.

St Mary's Healthcare

Acute Care Hospitals · Amsterdam, NY

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330047

Location427 Guy Park AvenueAmsterdam, NY 12010 · Montgomery County

Emergency services Birthing friendly

Garnet Health Medical Center

Acute Care Hospitals · Middletown, NY

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330126

Location707 East Main StreetMiddletown, NY 10940 · Orange County

Emergency services Birthing friendly

Saratoga Hospital

Acute Care Hospitals · Saratoga Springs, NY

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330222

Location211 Church StreetSaratoga Springs, NY 12866 · Saratoga County

Emergency services Birthing friendly

Nathan Littauer Hospital

Acute Care Hospitals · Gloversville, NY

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330276

Location99 East State StreetGloversville, NY 12078 · Fulton County

Emergency services Birthing friendly

Saint Vincent Hospital

Acute Care Hospitals · Erie, PA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390009

Location232 West 25th StreetErie, PA 16544 · Erie County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63110 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

$86.32 typical visit price

range $55.65 – $169.38

Typical copayment $21.58 (range $13.91 – $42.34)

Most-billed visit code 99203

Established Patient

$69.50 typical visit price

range $17.76 – $137.92

Typical copayment $17.37 (range $4.44 – $34.48)

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.

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.

BENJAMIN LEE MD

Radiology (Neuroradiology)

510 S KINGSHIGHWAY BLVD
SAINT LOUIS, MO 63110

St. Louis City (314) 362-7092

DR. ADRIAN ALBERTO SANCHEZ MD