2026 NPPES data Family Medicine Physician NPI 1265532907 M.D.
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PETER AROSEMENA, M.D.

Family Medicine Physician in POPLAR, Montana. 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
6K
Medicare Part D claims · 184 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
78%
generic claims · 22% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: PETER AROSEMENA, M.D. is a Family Medicine Physician ([object Object]) practicing in POPLAR, Montana with a Medicare Part D prescribing footprint of 6K claims across 184 beneficiaries — 22% brand-name prescribing .

What stands out: PETER AROSEMENA, M.D. filed 5,551 Medicare Part D claims in 2023 across POPLAR, Montana. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

PETER AROSEMENA, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

PETER AROSEMENA, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 09/23/2006

NPI 1265532907

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

5,551 62% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in Montana

How Family Medicine Physician compares to other specialties among Montana providers

Montana providers

Family Medicine Physician share within Montana

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Family 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).

PETER AROSEMENA, M.D. is a Family Medicine Physician provider practicing in POPLAR, Montana, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1265532907. 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.

PETER AROSEMENA, M.D. appears in the CMS NPPES registry as a Family Medicine Physician provider holding M.D. credentials at 107 H. ST. EAST, POPLAR, MT, 59255, with a listed phone of (406) 768-3491. NPI 1265532907 was issued on 09/23/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what AROSEMENA 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 5,551 prescription claims written by this provider, covering 184 Medicare beneficiaries and totaling roughly $313K in drug spend, split 22% brand-name and 78% generic by claim count, with an opioid prescribing rate of 1.3%. 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.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

107 H. ST. EAST
POPLAR, MT 59255

Provider Details

NPI 1265532907
Specialty Family Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 09/23/2006

Hospital and facility affiliations

Facilities where PETER AROSEMENA, M.D. 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.

U S HEALTH DEPT OF HEALTH AND HUMAN SERVICES
POPLAR, MT

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

Brand vs generic prescribing mix · Typical

PETER AROSEMENA, M.D. — brand share 22.0%
Specialty average (est.)

22% brand-name claims vs 78% generic, on 5,551 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.

5,551
Total Claims
$313K
Total Drug Cost
184
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
5,583
Total Day Supply
154,983
Brand vs Generic
22% brand / 78% generic
Brand Drug Cost
$267K
Generic Drug Cost
$39K
Opioid Claims
70 (1.3% rate)
Antibiotic Claims
53

Patient Demographics

Average Patient Age
70.3 years
Avg HCC Risk Score
1.21
Gender Split
53% female / 47% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Lisinopril
329
Atorvastatin Calcium
309
Losartan Potassium
279
Gabapentin
248
Omeprazole
219
Synthroid
Levothyroxine Sodium
208
Simvastatin
182
Amlodipine Besylate
150
Potassium Chloride
146
Tamsulosin Hcl
125

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

Family Medicine Physician Overview

How PETER AROSEMENA, M.D. fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

PETER AROSEMENA, M.D.'s 5,551 claims are above the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Montana

Other clinicians with the same primary specialty enrolled in Montana, drawn from the same CMS NPPES roster as AROSEMENA.

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

Frequently Asked Questions

What is PETER AROSEMENA, M.D.'s specialty?
PETER AROSEMENA, M.D. specializes in Family Medicine Physician and practices in POPLAR, Montana. Credentials: M.D..
How much does PETER AROSEMENA, M.D. prescribe under Medicare Part D?
In 2023, PETER AROSEMENA, M.D. wrote 5,551 Medicare Part D claims totaling $313K in drug costs for 184 beneficiaries.
Where is PETER AROSEMENA, M.D. located?
PETER AROSEMENA, M.D. is located at 107 H. ST. EAST, POPLAR, MT, 59255. Phone: (406) 768-3491.
What is PETER AROSEMENA, M.D.'s NPI number?
PETER AROSEMENA, M.D.'s National Provider Identifier (NPI) is 1265532907, issued on 09/23/2006.
Does PETER AROSEMENA, M.D. prescribe more brand-name or generic drugs?
PETER AROSEMENA, M.D.'s prescribing is 22% brand-name and 78% generic drugs by claim count, with $267K in brand drug costs.
Does PETER AROSEMENA, M.D. prescribe opioids?
Yes, PETER AROSEMENA, M.D. had 70 opioid claims in 2023 with an opioid prescribing rate of 1.3%.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does PETER AROSEMENA, M.D. prescribe most often?
Based on 2023 Medicare Part D data, PETER AROSEMENA, M.D.'s most frequently prescribed drugs include Lisinopril, Atorvastatin Calcium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does PETER AROSEMENA, M.D. accept Medicare?
PETER AROSEMENA, M.D. appears in CMS Medicare data with 5,551 Part D claims and 184 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify PETER AROSEMENA, M.D.'s credentials?
PETER AROSEMENA, M.D.'s NPI is 1265532907 with credentials M.D.. 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