2026 NPPES data Internal Medicine Physician NPI 1023051521 M.D.
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BRIAN MOORE, M.D.

Internal Medicine 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
145
Medicare Part D claims · 65 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

BRIAN MOORE, M.D. filed 145 Medicare Part D claims in 2023 as a Internal Medicine Physician in PORTLAND, Maine, prescribing 86% generic.

145
Part D claims, 2023
86%
generic prescribing
Likely
board-certified (heuristic)

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.

BRIAN MOORE, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

145 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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 certification likely (heuristic — not verified)

BRIAN MOORE, 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).

What does the federal data show about BRIAN MOORE, M.D.?

Quality data not reported

NPI registry status

Active

Issued 06/13/2006

NPI 1023051521

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

145 95% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Maine

How Internal Medicine Physician compares to other specialties among Maine providers

Maine providers

Internal Medicine Physician share within Maine

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

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 MOORE, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 144 STATE ST, PORTLAND, ME, 04101, with a listed phone of (207) 879-3000. NPI 1023051521 was issued on 06/13/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MOORE 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 145 prescription claims written by this provider, covering 65 Medicare beneficiaries and totaling roughly $10K in drug spend, split 14% brand-name and 86% 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

144 STATE ST
PORTLAND, ME 04101

Provider Details

NPI 1023051521
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 06/13/2006

Hospital and facility affiliations

Facilities where BRIAN MOORE, 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.

MERCY HOSPITAL
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

BRIAN MOORE, M.D. — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 145 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.

145
Total Claims
$10K
Total Drug Cost
65
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
149
Total Day Supply
2,506
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$7K
Generic Drug Cost
$4K
Antibiotic Claims
51

Patient Demographics

Average Patient Age
73.3 years
Avg HCC Risk Score
1.74
Gender Split
60% female / 40% 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
Prednisone
11

* 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 MOORE, M.D. 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 MOORE, M.D.'s 145 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Maine

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

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

Frequently Asked Questions

What is BRIAN MOORE, M.D.'s specialty?
BRIAN MOORE, M.D. specializes in Internal Medicine Physician and practices in PORTLAND, Maine. Credentials: M.D..
How much does BRIAN MOORE, M.D. prescribe under Medicare Part D?
In 2023, BRIAN MOORE, M.D. wrote 145 Medicare Part D claims totaling $10K in drug costs for 65 beneficiaries.
Where is BRIAN MOORE, M.D. located?
BRIAN MOORE, M.D. is located at 144 STATE ST, PORTLAND, ME, 04101. Phone: (207) 879-3000.
What is BRIAN MOORE, M.D.'s NPI number?
BRIAN MOORE, M.D.'s National Provider Identifier (NPI) is 1023051521, issued on 06/13/2006.
Does BRIAN MOORE, M.D. prescribe more brand-name or generic drugs?
BRIAN MOORE, M.D.'s prescribing is 14% brand-name and 86% generic drugs by claim count, with $7K 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 MOORE, M.D. prescribe most often?
Based on 2023 Medicare Part D data, BRIAN MOORE, M.D.'s most frequently prescribed drugs include Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does BRIAN MOORE, M.D. accept Medicare?
BRIAN MOORE, M.D. appears in CMS Medicare data with 145 Part D claims and 65 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify BRIAN MOORE, M.D.'s credentials?
BRIAN MOORE, M.D.'s NPI is 1023051521 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