2026 NPPES data Internal Medicine Physician NPI 1750710554 D.O.
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BRIAN GRONDAHL, D.O.

Internal Medicine Physician in FARGO, North Dakota. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
1K
Medicare Part D claims · 276 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
84%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$920.86
43 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: BRIAN GRONDAHL, D.O. is a Internal Medicine Physician ([object Object]) practicing in FARGO, North Dakota with a Medicare Part D prescribing footprint of 1K claims across 276 beneficiaries — 16% brand-name prescribing . Industry payments of $920.86 across 43 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: BRIAN GRONDAHL, D.O. filed 1,054 Medicare Part D claims in 2023 across FARGO, North Dakota. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

BRIAN GRONDAHL, D.O. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

BRIAN GRONDAHL, D.O. at a glance

Quality data not reported

NPI registry status

Active

Issued 11/02/2013

NPI 1750710554

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

1,054 61% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in North Dakota

How Internal Medicine Physician compares to other specialties among North Dakota providers

North Dakota providers

Internal Medicine Physician share within North Dakota

1. Internal Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Internal Medicine Physician share within North Dakota

Specialty board-certification context

Estimated specialty board-certified rate — Internal Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Internal Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

BRIAN GRONDAHL, D.O. is a Internal Medicine Physician provider practicing in FARGO, North Dakota, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: D.O.. NPI: 1750710554. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

BRIAN GRONDAHL, D.O. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding D.O. credentials at 3000 32ND AVE S, FARGO, ND, 58103, with a listed phone of (701) 364-8000. NPI 1750710554 was issued on 11/02/2013. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GRONDAHL most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 1,054 prescription claims written by this provider, covering 276 Medicare beneficiaries and totaling roughly $181K in drug spend, split 16% brand-name and 84% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

3000 32ND AVE S
FARGO, ND 58103

Provider Details

NPI 1750710554
Specialty Internal Medicine Physician
Credentials D.O.
Gender Male
NPI Issued 11/02/2013

Hospital and facility affiliations

Facilities where BRIAN GRONDAHL, D.O. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

INNOVIS HEALTH LLC
FARGO, ND
ST MARYS REGIONAL HEALTH CENTER
DETROIT LAKES, MN

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for BRIAN GRONDAHL, D.O.. Source: openpaymentsdata.cms.gov.

Total received

$921

Largest payer

ShockWave Medical, Inc

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Typical

BRIAN GRONDAHL, D.O. — brand share 16.0%
Specialty average (est.)

16% brand-name claims vs 84% generic, on 1,054 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

1,054
Total Claims
$181K
Total Drug Cost
276
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,387
Total Day Supply
69,792
Brand vs Generic
16% brand / 84% generic
Brand Drug Cost
$161K
Generic Drug Cost
$20K

Patient Demographics

Average Patient Age
74.7 years
Avg HCC Risk Score
1.50
Gender Split
46% female / 54% male
Age Distribution
<65: 15, 65-74: 125, 75-84: 98, 85+: 38

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Metoprolol Succinate
114
Rosuvastatin Calcium
105
Eliquis
Apixaban
97
Clopidogrel
Clopidogrel Bisulfate
77
Amlodipine Besylate
65
Losartan Potassium
51
Ezetimibe
47
Carvedilol
40
Atorvastatin Calcium
39
Furosemide
38

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Internal Medicine Physician Overview

How BRIAN GRONDAHL, D.O. fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

BRIAN GRONDAHL, D.O.'s 1,054 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in North Dakota

Other clinicians with the same primary specialty enrolled in North Dakota, drawn from the same CMS NPPES roster as GRONDAHL.

Compare Internal Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is BRIAN GRONDAHL, D.O.'s specialty?
BRIAN GRONDAHL, D.O. specializes in Internal Medicine Physician and practices in FARGO, North Dakota. Credentials: D.O..
How much does BRIAN GRONDAHL, D.O. prescribe under Medicare Part D?
In 2023, BRIAN GRONDAHL, D.O. wrote 1,054 Medicare Part D claims totaling $181K in drug costs for 276 beneficiaries.
Where is BRIAN GRONDAHL, D.O. located?
BRIAN GRONDAHL, D.O. is located at 3000 32ND AVE S, FARGO, ND, 58103. Phone: (701) 364-8000.
What is BRIAN GRONDAHL, D.O.'s NPI number?
BRIAN GRONDAHL, D.O.'s National Provider Identifier (NPI) is 1750710554, issued on 11/02/2013.
Does BRIAN GRONDAHL, D.O. prescribe more brand-name or generic drugs?
BRIAN GRONDAHL, D.O.'s prescribing is 16% brand-name and 84% generic drugs by claim count, with $161K in brand drug costs.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does BRIAN GRONDAHL, D.O. prescribe most often?
Based on 2023 Medicare Part D data, BRIAN GRONDAHL, D.O.'s most frequently prescribed drugs include Metoprolol Succinate, Rosuvastatin Calcium, Eliquis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does BRIAN GRONDAHL, D.O. accept Medicare?
BRIAN GRONDAHL, D.O. appears in CMS Medicare data with 1,054 Part D claims and 276 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify BRIAN GRONDAHL, D.O.'s credentials?
BRIAN GRONDAHL, D.O.'s NPI is 1750710554 with credentials D.O.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology