2026 NPPES data Internal Medicine Physician NPI 1508928060 MD
Verify on CMS →

CATHERINE DUBEAU, MD

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
5K
Medicare Part D claims · 412 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
69.4014/100
▼ 14 pts below national avg 83.1 · [object Object]
What the federal data reveals: CATHERINE DUBEAU, MD is a Internal Medicine Physician ([object Object]) practicing in PORTLAND, Maine with a Medicare Part D prescribing footprint of 5K claims across 412 beneficiaries — 12% brand-name prescribing . Their CMS MIPS Final Score of 69.4014/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: CATHERINE DUBEAU, MD reported a CMS MIPS final score of 69.4014 out of 100, below the 83.1 national average, and filed 4,883 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

CATHERINE DUBEAU, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

CATHERINE DUBEAU, MD at a glance

Below national average

NPI registry status

Active

Issued 12/14/2006

NPI 1508928060

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

4,883 80% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

MIPS final score

69.4014/100 13.698599999999999% pts

Mid-tier band

vs 83.1 national avg

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

Medicare quality performance — MIPS

CATHERINE DUBEAU, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average

Below national average
MIPS Final Score
69.4014/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Internal Medicine Physician) — 69.4014/100 vs national avg 83.1

0%100%National avg83%69.4%
MIPS final score (Internal Medicine Physician) — 69.4014/100 vs national avg 83.1

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).

CATHERINE DUBEAU, MD is a Internal Medicine Physician provider practicing in PORTLAND, Maine, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1508928060. 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.

CATHERINE DUBEAU, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 66 BRAMHALL ST FL 1, PORTLAND, ME, 04102, with a listed phone of (207) 662-3157. NPI 1508928060 was issued on 12/14/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DUBEAU 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 4,883 prescription claims written by this provider, covering 412 Medicare beneficiaries and totaling roughly $445K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 1.6%. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 69.4014/100 for the 2023 performance year (Quality 55.6429, Cost 42.3618), compared with the national average of 83.1.

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

66 BRAMHALL ST FL 1
PORTLAND, ME 04102

Provider Details

NPI 1508928060
Specialty Internal Medicine Physician
Credentials MD
Gender Female
NPI Issued 12/14/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

69.4014
Final Score
Avg: 83.1
55.6429
Quality
42.3618
Cost
100
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where CATHERINE DUBEAU, MD 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.

MAINEHEALTH
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

CATHERINE DUBEAU, MD — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 4,883 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.

4,883
Total Claims
$445K
Total Drug Cost
412
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
11,596
Total Day Supply
337,414
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$326K
Generic Drug Cost
$117K
Opioid Claims
79 (1.6% rate)
Antibiotic Claims
46

Patient Demographics

Average Patient Age
80.6 years
Avg HCC Risk Score
1.41
Gender Split
74% female / 26% 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
Atorvastatin Calcium
335
Levothyroxine Sodium
331
Losartan Potassium
270
Amlodipine Besylate
241
Lisinopril
239
Omeprazole
173
Metoprolol Succinate
169
Furosemide
137
Eliquis
Apixaban
125
Pantoprazole Sodium
106

* 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 CATHERINE DUBEAU, MD 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

CATHERINE DUBEAU, MD's 4,883 claims are above 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 DUBEAU.

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

Frequently Asked Questions

What is CATHERINE DUBEAU, MD's specialty?
CATHERINE DUBEAU, MD specializes in Internal Medicine Physician and practices in PORTLAND, Maine. Credentials: MD.
How much does CATHERINE DUBEAU, MD prescribe under Medicare Part D?
In 2023, CATHERINE DUBEAU, MD wrote 4,883 Medicare Part D claims totaling $445K in drug costs for 412 beneficiaries.
What is CATHERINE DUBEAU, MD's Medicare quality score?
CATHERINE DUBEAU, MD has a CMS MIPS Final Score of 69.4014/100 (Quality: 55.6429, Cost: 42.3618). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is CATHERINE DUBEAU, MD located?
CATHERINE DUBEAU, MD is located at 66 BRAMHALL ST FL 1, PORTLAND, ME, 04102. Phone: (207) 662-3157.
What is CATHERINE DUBEAU, MD's NPI number?
CATHERINE DUBEAU, MD's National Provider Identifier (NPI) is 1508928060, issued on 12/14/2006.
Does CATHERINE DUBEAU, MD prescribe more brand-name or generic drugs?
CATHERINE DUBEAU, MD's prescribing is 12% brand-name and 88% generic drugs by claim count, with $326K in brand drug costs.
Does CATHERINE DUBEAU, MD prescribe opioids?
Yes, CATHERINE DUBEAU, MD had 79 opioid claims in 2023 with an opioid prescribing rate of 1.6%.
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 CATHERINE DUBEAU, MD prescribe most often?
Based on 2023 Medicare Part D data, CATHERINE DUBEAU, MD's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CATHERINE DUBEAU, MD accept Medicare?
CATHERINE DUBEAU, MD appears in CMS Medicare data with 4,883 Part D claims and 412 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CATHERINE DUBEAU, MD's credentials?
CATHERINE DUBEAU, MD's NPI is 1508928060 with credentials MD. 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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