NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1558773994 M.D.
Verify on CMS → Evan Barnathan, M.D.
Family Medicine Physician in Portland, Maine.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in Family 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
868
Medicare Part D claims · 189 beneficiaries · Family Medicine Physician avg: 3K
What the federal data shows
Evan Barnathan, M.D. filed 868 Medicare Part D claims in 2023 as a Family Medicine Physician in Portland, Maine.
- 868
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥73rd
- pct by Part D claim volume (lower-bound band)
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.
CMS NPPES provider registry desk
NPI 1558773994 · Family Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1558773994
- ENUM-MID 2014
- TAX-MEGA 148K Family Medicine
- RX-LIGHT 868
- BOOK-LIGHT 1,159 in Maine
- PHOTO-ENUM Trevor Harrington · 2014
Evan Barnathan, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
868 ≥ 73rd percentile 73% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Evan Barnathan, 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 Evan Barnathan, M.D.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
868 75% vs specialty avg
Specialty distribution in Maine
How Family Medicine Physician compares to other specialties among Maine 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 Family 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).
Practice Address
Provider Details
| NPI | 1558773994 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 05/20/2014 |
Hospital and facility affiliations
Facilities where Evan Barnathan, 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.
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).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
868
Total Claims
$137K
Total Drug Cost
189
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,951
- Total Day Supply
- 56,526
- Generic Drug Cost
- $18K
- Opioid Claims
- 21 (2.4% rate)
- Antibiotic Claims
- 15
Patient Demographics
- Average Patient Age
- 66.4 years
- Avg HCC Risk Score
- 1.50
- Gender Split
- 43% female / 57% male
- Age Distribution
- <65: 61, 65-74: 83, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Evan Barnathan, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
77 claims
- Atorvastatin Calcium
Atorvastatin Calcium
74 claims
- Amlodipine Besylate 30
Amlodipine Besylate
30 claims
- Lisinopril 29
Lisinopril
29 claims
- Losartan Potassium 25
Losartan Potassium
25 claims
- Sertraline Hcl 24
Sertraline Hcl
24 claims
- Albuterol Sulfate … 23
Albuterol Sulfate Hfa
23 claims
- Pantoprazole Sodium 22
Pantoprazole Sodium
22 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 77 |
| Atorvastatin Calcium | 74 |
| Amlodipine Besylate | 30 |
| Lisinopril | 29 |
| Losartan Potassium | 25 |
| Sertraline Hcl | 24 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 23 |
| Pantoprazole Sodium | 22 |
| Metformin Hcl | 19 |
| Omeprazole | 18 |
* 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 Evan Barnathan, M.D. fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Evan Barnathan, M.D.'s 868 claims are below the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Barnathan, both outside Maine so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2014)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Maine
Other clinicians with the same primary specialty enrolled in Maine, drawn from the same CMS NPPES roster as Barnathan.
One of 1,159 Family Medicine Physician providers enrolled in Maine, 5 are shown here.
Dr. Jeffrey Aalberg
MD
Falmouth, ME
Dr. Elizabeth Abbas
DO
Farmington, ME
Dr. Robert Abrams
M.D.
Lubec, ME
Dr. Andrea Abrell
DO
Augusta, ME
Dr. Katie Adams
MD
Lincoln, ME
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Evan Barnathan, M.D.'s specialty? ▼
Evan Barnathan, M.D. specializes in Family Medicine Physician and practices in Portland, Maine. Credentials: M.D..
How much does Evan Barnathan, M.D. prescribe under Medicare Part D? ▼
In 2023, Evan Barnathan, M.D. wrote 868 Medicare Part D claims totaling $137K in drug costs for 189 beneficiaries.
Where is Evan Barnathan, M.D. located? ▼
Evan Barnathan, M.D. is located at 22 BRAMHALL ST, Portland, ME, 04102. Phone: (207) 662-0111.
What is Evan Barnathan, M.D.'s NPI number? ▼
Evan Barnathan, M.D.'s National Provider Identifier (NPI) is 1558773994, issued on 05/20/2014.
Does Evan Barnathan, M.D. prescribe opioids? ▼
Yes, Evan Barnathan, M.D. had 21 opioid claims in 2023 with an opioid prescribing rate of 2.4%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 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 Evan Barnathan, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Evan Barnathan, M.D.'s most frequently prescribed drugs include Levothyroxine Sodium, Atorvastatin Calcium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Evan Barnathan, M.D. accept Medicare? ▼
Evan Barnathan, M.D. appears in CMS Medicare data with 868 Part D claims and 189 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Evan Barnathan, M.D.'s credentials? ▼
Evan Barnathan, M.D.'s NPI is 1558773994 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
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
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.