DR. MARK R GUNDERSEN MD
NPI 1952390106
Family Medicine in Fergus Falls, MN

Q: What is Mark Gundersen's NPI number?

The NPI number for Mark Gundersen is 1952390106. It was assigned to this individual provider in the NPPES registry on October 20, 2005.

Q: What is Mark Gundersen's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for Mark Gundersen was last updated on October 29, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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 October 20, 2005PECOS EnrolledAccepts Medicare Assignment

712 SOUTH CASCADE STREET, FERGUS FALLS, MN 56537(218) 736-8000(218) 739-6742 Get Directions Write a Review

NPPES record last updated: October 29, 2019. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Mark R Gundersen Md NPPES

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

DR. MARK R GUNDERSEN MD (NPI 1952390106) is an individual family medicine provider in Fergus Falls, Minnesota, licensed in Minnesota (35677) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, is affiliated with Sanford Worthington Medical Center, and is a graduate of University Of Minnesota Medical School (1989).

NPPES Registry Identity

NPI1952390106

Entity TypeIndividualMale

Primary Taxonomy207Q00000X

Provider Legal NameDR. MARK R GUNDERSENCredential: MD

Location Address712 SOUTH CASCADE STREETFergus Falls, MN 56537-2813

Mailing Address1216 Ryans RdWorthington, MN 56187-1722 · (507) 372-2921 · Fax (507) 372-6523

Phone(218) 736-8000

Fax(218) 739-6742

Sole ProprietorNo

Medical School CMSUniversity Of Minnesota Medical SchoolGraduated 1989

Enumeration DateOctober 20, 2005

Last NPPES UpdateOctober 29, 2019

✔ NPI 1952390106 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

Licenses✔ Licensed in MN · 35677✔ Licensed in MI · 4301069187

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

712 SOUTH CASCADE STREET, Fergus Falls, MN 56537

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Other Identifiers 13

Medicaid4540600MI

OtherC4258MI · Mcare

OtherF31478MI · Health Net Federal

Other010G56026MI · Health Plus

Other0802502771MI · Blue Cross Blue Shield

Other204375MI · Mclaren Health Plan

OtherF31478MI · Health Alliance Plan

Other080093188MI · Metrahealth

Other080D410020MI · Blue Cross Blue Shield

Other7073962004MI · Cigna

Other080D410020MI · Blue Care Network

Other204375MI · Health Advantage Network

Other5659321MI · Aetna

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Sunflower Health Plan, Ambetter Health, Ambetter Health of Delaware and more.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. Mark R Gundersen Md 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 ID3274534441

PECOS Enrollment IDI20081007000057

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 Mark Gundersen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Avera Mckennan

78 mi

Rural Health

301 FLYNN DR
Milbank, SD 57252

Reassigned Medicare billing, Minnesota enrollment
75 clinicians in this Medicare group

NPI 1750488730 (605) 432-4587

Rural Health Care, Inc

127 mi

Federally Qualified Health Center (FQHC)

1521 CARLSON ST STE 100
Marshall, MN 56258

Reassigned Medicare billing, Minnesota enrollment
92 clinicians in this Medicare group

NPI 1740944602 (507) 476-4800

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 20

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.

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

492 services201 patients

Blood test, clotting time 85610

A clotting time blood test helps determine how quickly your blood forms clots, a process crucial to stop bleeding. During the test, a small blood sample is taken from your arm. The sample is then analyzed in a lab to see how long it takes for a clot to form.

322 services26 patients

Blood test, comprehensive group of blood chemicals 80053

A comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.

177 services166 patients

Blood test, lipids (cholesterol and triglycerides) 80061

A lipid panel is a blood test that measures fats and fatty substances, such as cholesterol and triglycerides. These substances are used by your body as a source of energy. High levels can lead to health issues, including heart disease.

168 services162 patients

Blood test, basic group of blood chemicals (calcium, total) 80048

A basic group blood test measures the levels of certain chemicals in your blood, including calcium. This helps assess your overall health and detect potential problems. The procedure involves drawing a small amount of blood from your arm, which is then analyzed in a lab.

117 services95 patients

Hemoglobin a1c level 83036

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

102 services63 patients

Urine microalbumin (protein) level 82043

The urine microalbumin level test measures the amount of a protein called albumin in your urine. This test helps to detect early signs of kidney damage. High levels of albumin may suggest your kidneys aren't functioning properly. It's a simple, non-invasive test that involves providing a urine sample.

97 services93 patients

Creatinine level to test for kidney function or muscle injury 82570

A creatinine level test measures the amount of creatinine in your blood. This substance is a waste product from normal muscle use. Higher levels can indicate possible kidney dysfunction or muscle injury. This test helps monitor kidney health.

96 services93 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count 85025

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

94 services57 patients

Blood test, thyroid stimulating hormone (tsh) 84443

A TSH blood test measures the level of thyroid stimulating hormone in your body. This hormone is produced by the pituitary gland and regulates how your thyroid works. It's a simple procedure where a small amount of blood is drawn from your arm for analysis.

62 services48 patients

Manual urinalysis test with examination using microscope, automated 81001

A manual urinalysis test with automated microscopic examination is a lab process that checks your urine for health indicators. It involves a machine scanning your sample to identify any abnormal elements, which can assist in diagnosing various conditions.

43 services29 patients

Screening 3d breast mammography 77063

Screening 3D breast mammography is a procedure that uses low-dose X-rays to create detailed images of the breast. This allows for early detection of any unusual changes or growths. It's a non-invasive, outpatient procedure that typically takes about 30 minutes.

42 services42 patients

Screening mammography 77067

Screening mammography is a preventative measure that uses low-dose X-rays to take images of the chest area. It's a key tool in early detection of abnormalities, helping to identify issues before they become symptomatic. It is recommended annually for certain age groups.

42 services42 patients

Bacterial colony count, urine 87086

A bacterial colony count, urine, is a laboratory test that checks a urine sample for bacteria. It helps to identify if an infection is present in the urinary system. High numbers of bacteria in the urine can indicate a urinary tract infection (UTI).

25 services20 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.

22 services22 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.

21 services14 patients

Routine electrocardiogram (ecg) using at least 12 leads with tracing 93005

An Electrocardiogram (ECG) is a simple, painless test that records the heart's electrical activity. Using 12 leads attached to your skin, it generates a tracing of your heart rhythm. It helps detect any heart problems by showing the timing and strength of electrical signals passing through each part of your heart.

18 services17 patients

Bacterial culture for aerobic isolates 87077

A bacterial culture for aerobic isolates is a lab test that helps identify bacteria that thrive in oxygen-rich environments. A sample from the suspected infection site is collected, then placed in a special medium that promotes bacterial growth. After a set period, the lab identifies any bacteria present, aiding in accurate diagnosis and treatment.

17 services13 patients

Evaluation of antimicrobial drug (antibiotic, antifungal, antiviral), microdilution or agar dilution 87186

This process checks how well certain drugs, like antibiotics, can fight against infections. It involves mixing the drug with a microbe (like bacteria or a virus) in a lab. By observing how the microbe reacts, it helps determine the best drug to treat your infection.

17 services13 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

13 services13 patients

Hospital Affiliations CMS Care Compare 2

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

Sanford Worthington Medical Center

Acute Care Hospitals · Worthington, MN

OwnershipVoluntary non-profit - Private

CMS Certification Number240022

Location1018 Sixth Avenue PO Box 997Worthington, MN 56187 · Nobles County

Emergency services Birthing friendly

Avera Mckennan Hospital & University Health Center

Acute Care Hospitals · Sioux Falls, SD

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number430016

Location1325 S Cliff AveSioux Falls, SD 57117 · Minnehaha County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 56537 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

$85.82 typical visit price

range $56.00 – $168.28

Typical copayment $21.45 (range $14.00 – $42.07)

Most-billed visit code 99203

Established Patient

$98.61 typical visit price

range $18.32 – $138.04

Typical copayment $24.65 (range $4.58 – $34.51)

Most-billed visit code 99214

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

Referred Medical Equipment & Supplies CMS DME claims 13

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

5 suppliers41 claims89 services$3.87 avg. paid by Medicare

Tubing with integrated heating element for use with positive airway pressure device A4604

DME-Other DME · category DE001N

2 suppliers13 claims13 services$46.19 avg. paid by Medicare

Pillow for use on nasal cannula type interface, replacement only, pair A7033

DME-Other DME · category DE001N

2 suppliers11 claims46 services$19.06 avg. paid by Medicare

Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap A7034

DME-Other DME · category DE001N

2 suppliers12 claims12 services$74.65 avg. paid by Medicare

Headgear used with positive airway pressure device A7035

DME-Other DME · category DE001N

2 suppliers12 claims12 services$25.03 avg. paid by Medicare

Filter, disposable, used with positive airway pressure device A7038

DME-Other DME · category DE001N

2 suppliers20 claims61 services$2.89 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

MRS. JERILYN J. MITCHELL CNS, LP (PMHCNS-BC,

Clinical Nurse Specialist

712 SOUTH CASCADE STREET
FERGUS FALLS, MN 56537

Otter Tail County (218) 736-8000

STEVEN B THOM MD

Ophthalmology

712 SOUTH CASCADE STREET
FERGUS FALLS, MN 56537

Otter Tail County (218) 736-8000

JULIANNE D GUTZMER MD

Surgery

712 SOUTH CASCADE STREET
FERGUS FALLS, MN 56537

Otter Tail County (218) 736-8000

HEIDI A OTTENBACHER OD

Optometrist

712 SOUTH CASCADE STREET
FERGUS FALLS, MN 56537

Otter Tail County (218) 736-8000

MATTHEW J. MOUSER MD

Internal Medicine

712 SOUTH CASCADE STREET
FERGUS FALLS, WI 56537

Otter Tail County (218) 736-8000

LAWRENCE F. EISINGER MD

Pediatrics

712 SOUTH CASCADE STREET
FERGUS FALLS, MN 56537

Otter Tail County (218) 736-8000

MARIE BRAATEN NP

Nurse Practitioner (Gerontology)

712 SOUTH CASCADE STREET
FERGUS FALLS, MN 56537

Otter Tail County (218) 736-8000

DANIEL L LEMBCKE M.D.

Family Medicine

712 SOUTH CASCADE STREET
FERGUS FALLS, MN 56537

Otter Tail County (218) 736-8000

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 Mark Gundersen's NPI number?

The NPI number for Mark Gundersen is 1952390106. It was assigned to this individual provider in the NPPES registry on October 20, 2005.

Where is Mark Gundersen located?

Mark Gundersen practices at 712 South Cascade Street, Fergus Falls, MN 56537. The listed phone number is (218) 736-8000.

What is Mark Gundersen's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Mark Gundersen enrolled in Medicare?

Yes. Mark Gundersen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Mark Gundersen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Gundersen reassigns Medicare benefits to 2 organizations: Avera Mckennan (Milbank, SD) and Rural Health Care, Inc (Marshall, MN). 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 Mark Gundersen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Gundersen accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Sunflower Health Plan, Avera Health Plans and Sanford Health Plan and 1 other insurer list Mark Gundersen 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 Mark Gundersen affiliated with any hospitals?

According to CMS data, Mark Gundersen is affiliated with Sanford Worthington Medical Center and Avera Mckennan Hospital & University Health Center.

When was this NPI record last updated?

The NPPES record for Mark Gundersen was last updated on October 29, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.