2026 NPPES data Hospitalist Physician NPI 1134206352 DO
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ROBERT FRASER, DO

Hospitalist Physician in PORTLAND, Maine. 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
11K
Medicare Part D claims · 710 beneficiaries · Hospitalist Physician avg: 888
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: ROBERT FRASER, DO is a Hospitalist Physician ([object Object]) practicing in PORTLAND, Maine with a Medicare Part D prescribing footprint of 11K claims across 710 beneficiaries — 14% brand-name prescribing .

What stands out: ROBERT FRASER, DO filed 10,605 Medicare Part D claims in 2023 across PORTLAND, Maine. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

ROBERT FRASER, DO 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).

ROBERT FRASER, DO at a glance

Quality data not reported

NPI registry status

Active

Issued 11/01/2006

NPI 1134206352

Primary specialty

Hospitalist Physician

Mid-sized

16,825 US NPIs in this specialty

Medicare Part D claims

10,605 1094% vs specialty avg

2023 prescription claims

Specialty avg: 888

Specialty distribution in Maine

How Hospitalist Physician compares to other specialties among Maine providers

Maine providers

Hospitalist Physician share within Maine

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

Specialty board-certification context

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

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

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

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

ROBERT FRASER, DO is a Hospitalist Physician provider practicing in PORTLAND, Maine, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: DO. NPI: 1134206352. 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.

ROBERT FRASER, DO appears in the CMS NPPES registry as a Hospitalist Physician provider holding DO credentials at 84 MARGINAL WAY, PORTLAND, ME, 04101, with a listed phone of (207) 774-5816. NPI 1134206352 was issued on 11/01/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FRASER 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 10,605 prescription claims written by this provider, covering 710 Medicare beneficiaries and totaling roughly $1.4 million in drug spend, split 14% brand-name and 86% generic by claim count, with an opioid prescribing rate of 2.4%. 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.

Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 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

84 MARGINAL WAY
PORTLAND, ME 04101

Provider Details

NPI 1134206352
Specialty Hospitalist Physician
Credentials DO
Gender Male
NPI Issued 11/01/2006

Hospital and facility affiliations

Facilities where ROBERT FRASER, DO 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.

INTERMED PA
SOUTH PORTLAND, ME

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

ROBERT FRASER, DO — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 10,605 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.

10,605
Total Claims
$1.4M
Total Drug Cost
710
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
25,447
Total Day Supply
743,147
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$1.2M
Generic Drug Cost
$192K
Opioid Claims
259 (2.4% rate)
Antibiotic Claims
184

Patient Demographics

Average Patient Age
74.2 years
Avg HCC Risk Score
1.03
Gender Split
39% female / 61% male
Age Distribution
<65: 17, 65-74: 375, 75-84: 256, 85+: 62

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
934
Amlodipine Besylate
530
Losartan Potassium
507
Rosuvastatin Calcium
454
Levothyroxine Sodium
351
Lisinopril
333
Omeprazole
243
Metoprolol Succinate
224
Metformin Hcl Er
Metformin Hcl
215
Tamsulosin Hcl
211

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

Hospitalist Physician Overview

How ROBERT FRASER, DO fits within the Hospitalist Physician landscape nationally.

16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider

ROBERT FRASER, DO's 10,605 claims are above the specialty average of 888.

Nearby Hospitalist Physician Providers in Maine

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

Compare Hospitalist Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ROBERT FRASER, DO's specialty?
ROBERT FRASER, DO specializes in Hospitalist Physician and practices in PORTLAND, Maine. Credentials: DO.
How much does ROBERT FRASER, DO prescribe under Medicare Part D?
In 2023, ROBERT FRASER, DO wrote 10,605 Medicare Part D claims totaling $1.4M in drug costs for 710 beneficiaries.
Where is ROBERT FRASER, DO located?
ROBERT FRASER, DO is located at 84 MARGINAL WAY, PORTLAND, ME, 04101. Phone: (207) 774-5816.
What is ROBERT FRASER, DO's NPI number?
ROBERT FRASER, DO's National Provider Identifier (NPI) is 1134206352, issued on 11/01/2006.
Does ROBERT FRASER, DO prescribe more brand-name or generic drugs?
ROBERT FRASER, DO's prescribing is 14% brand-name and 86% generic drugs by claim count, with $1.2M in brand drug costs.
Does ROBERT FRASER, DO prescribe opioids?
Yes, ROBERT FRASER, DO had 259 opioid claims in 2023 with an opioid prescribing rate of 2.4%.
How many Hospitalist Physician providers are there in the US?
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does ROBERT FRASER, DO prescribe most often?
Based on 2023 Medicare Part D data, ROBERT FRASER, DO's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ROBERT FRASER, DO accept Medicare?
ROBERT FRASER, DO appears in CMS Medicare data with 10,605 Part D claims and 710 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ROBERT FRASER, DO's credentials?
ROBERT FRASER, DO's NPI is 1134206352 with credentials DO. 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