NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1871653758 D.O.
Verify on CMS → Larry Grong, D.O.
Internal Medicine Physician in Dawson, Minnesota.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 in Internal Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
2K
Medicare Part D claims · 132 beneficiaries · Internal Medicine Physician avg: 3K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Larry Grong, D.O. filed 2,307 Medicare Part D claims in 2023 as a Internal Medicine Physician in Dawson, Minnesota.
- 2K
- Part D claims, 2023
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Larry Grong, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,307 Top 14% higher than 86% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Larry Grong, D.O. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Larry Grong, D.O.?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
2,307 15% vs specialty avg
Specialty distribution in Minnesota
How Internal Medicine Physician compares to other specialties among Minnesota providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Internal Medicine Physician. Verify directly:
How MIPS and board certification work
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).
Larry Grong, D.O. appears in the CMS NPPES registry as an Internal Medicine Physician provider holding D.O. credentials at 1282 WALNUT ST, Dawson, MN, 56232, with a listed phone of (320) 769-7393. NPI 1871653758 was issued on 12/11/2006.
Medicare Part D records for calendar year 2023 show 2,307 prescription claims written by this provider, covering 132 Medicare beneficiaries and totaling roughly $150K in drug spend, with an opioid prescribing rate of 2.6%.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 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
Provider Details
| NPI | 1871653758 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 12/11/2006 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
2,307
Total Claims
$150K
Total Drug Cost
132
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,807
- Total Day Supply
- 109,607
- Generic Drug Cost
- $36K
- Opioid Claims
- 59 (2.6% rate)
- Antibiotic Claims
- 48
Patient Demographics
- Average Patient Age
- 76.8 years
- Avg HCC Risk Score
- 1.08
- Gender Split
- 35% female / 65% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Larry Grong, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Omeprazole
Omeprazole
109 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
89 claims
- Amlodipine Besylate
Amlodipine Besylate
82 claims
- Atorvastatin Calcium
Atorvastatin Calcium
80 claims
- Lisinopril
Lisinopril
70 claims
- Levothyroxine Sodium
Levothyroxine Sodium
63 claims
- Metformin Hcl
Metformin Hcl
62 claims
- Metoprolol Succinate
Metoprolol Succinate
53 claims
| Drug | Claims |
|---|---|
| Omeprazole | 109 |
| Rosuvastatin Calcium | 89 |
| Amlodipine Besylate | 82 |
| Atorvastatin Calcium | 80 |
| Lisinopril | 70 |
| Levothyroxine Sodium | 63 |
| Metformin Hcl | 62 |
| Metoprolol Succinate | 53 |
| Gabapentin | 52 |
| Losartan Potassium | 48 |
* 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 Larry Grong, D.O. fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Larry Grong, D.O.'s 2,307 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Minnesota
Other clinicians with the same primary specialty enrolled in Minnesota, drawn from the same CMS NPPES roster as Grong.
Dr. Christopher Aakre
MD
Rochester, MN
Dr. Karen Aarestad
MD
Brainerd, MN
Dr. Peter Aas
MD
Duluth, MN
Dr. Saud Abaalkhail
M.B.,B.S.
Minneapolis, MN
Dr. Mohamad Abbas
M.D.
Saint Paul, MN
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Minnesota medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Internal Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Minnesota
Frequently Asked Questions
What is Larry Grong, D.O.'s specialty? ▼
Larry Grong, D.O. specializes in Internal Medicine Physician and practices in Dawson, Minnesota. Credentials: D.O..
How much does Larry Grong, D.O. prescribe under Medicare Part D? ▼
In 2023, Larry Grong, D.O. wrote 2,307 Medicare Part D claims totaling $150K in drug costs for 132 beneficiaries.
Where is Larry Grong, D.O. located? ▼
Larry Grong, D.O. is located at 1282 WALNUT ST, Dawson, MN, 56232. Phone: (320) 769-7393.
What is Larry Grong, D.O.'s NPI number? ▼
Larry Grong, D.O.'s National Provider Identifier (NPI) is 1871653758, issued on 12/11/2006.
Does Larry Grong, D.O. prescribe opioids? ▼
Yes, Larry Grong, D.O. had 59 opioid claims in 2023 with an opioid prescribing rate of 2.6%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 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 Larry Grong, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, Larry Grong, D.O.'s most frequently prescribed drugs include Omeprazole, Rosuvastatin Calcium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Larry Grong, D.O. accept Medicare? ▼
Larry Grong, D.O. appears in CMS Medicare data with 2,307 Part D claims and 132 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Larry Grong, D.O.'s credentials? ▼
Larry Grong, D.O.'s NPI is 1871653758 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
View source datasets and methodology notes
- 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
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.