NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1437138955 MD, ECNU
Verify on CMS → Wesley Fairfield, MD, ECNU
Endocrinology, Diabetes & Metabolism 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 7,852 in Endocrinology, Diabetes & Metabolism 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
923
Medicare Part D claims · 236 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Wesley Fairfield, MD, ECNU filed 923 Medicare Part D claims in 2023 as a Endocrinology, Diabetes & Metabolism Physician in Portland, Maine.
- 923
- Part D claims, 2023
- 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.
Wesley Fairfield, MD, ECNU's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
923 Top 25% higher than 75% of 1,370,886 prescribers
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)
Wesley Fairfield, MD, ECNU 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 Wesley Fairfield, MD, ECNU?
Quality data not reportedPrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
923 65% vs specialty avg
Specialty distribution in Maine
How Endocrinology, Diabetes & Metabolism 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 Endocrinology, Diabetes & Metabolism 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).
Wesley Fairfield, MD, ECNU appears in the CMS NPPES registry as a Endocrinology, Diabetes & Metabolism Physician provider holding MD, ECNU credentials at 144 STATE ST FL 4, Portland, ME, 04101, with a listed phone of (207) 400-8500. NPI 1437138955 was issued on 01/12/2006.
Medicare Part D records for calendar year 2023 show 923 prescription claims written by this provider, covering 236 Medicare beneficiaries and totaling roughly $698K in drug spend.
Endocrinology, Diabetes & Metabolism Physician is a mid-sized specialty nationwide, with 7,852 enrolled providers across 54 states and an average of 2,639 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
Provider Details
| NPI | 1437138955 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | MD, ECNU |
| Gender | Male |
| NPI Issued | 01/12/2006 |
Hospital and facility affiliations
Facilities where Wesley Fairfield, MD, ECNU 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).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
923
Total Claims
$698K
Total Drug Cost
236
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,424
- Total Day Supply
- 71,810
- Generic Drug Cost
- $32K
Patient Demographics
- Average Patient Age
- 69.5 years
- Avg HCC Risk Score
- 1.12
- Gender Split
- 72% female / 28% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Wesley Fairfield, MD, ECNU prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
352 claims
- Methimazole 122
Methimazole
122 claims
- Alendronate Sodium 63
Alendronate Sodium
63 claims
- Synthroid 60
Synthroid
60 claims
- Levoxyl 44
Levoxyl
44 claims
- Prednisone 35
Prednisone
35 claims
- Hydrocortisone 23
Hydrocortisone
23 claims
- Isturisa 22
Isturisa
22 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 352 |
| Methimazole | 122 |
| Alendronate Sodium | 63 |
| Synthroid Levothyroxine Sodium | 60 |
| Levoxyl Levothyroxine Sodium | 44 |
| Prednisone | 35 |
| Hydrocortisone | 23 |
| Isturisa Osilodrostat Phosphate | 22 |
| Testosterone | 20 |
| Teriparatide | 18 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Endocrinology, Diabetes & Metabolism Physician in ME →
All providers in Maine →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Wesley Fairfield, MD, ECNU fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
7,852
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider
Wesley Fairfield, MD, ECNU's 923 claims are below the specialty average of 2,639.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Maine
Other clinicians with the same primary specialty enrolled in Maine, drawn from the same CMS NPPES roster as Fairfield.
Dr. Shazia Ahmad
M.D.
Bangor, ME
Dr. Jayachidambaram Ambalavanan
MD
Scarborough, ME
Dr. Robert Bing-You
MD
Scarborough, ME
Dr. Emily Demetriou
MD
Scarborough, ME
Dr. Abtin Farahmand
MD
Scarborough, ME
Compare Endocrinology, Diabetes & Metabolism Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Maine medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Endocrinology, Diabetes & Metabolism Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Wesley Fairfield, MD, ECNU's specialty? ▼
Wesley Fairfield, MD, ECNU specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Portland, Maine. Credentials: MD, ECNU.
How much does Wesley Fairfield, MD, ECNU prescribe under Medicare Part D? ▼
In 2023, Wesley Fairfield, MD, ECNU wrote 923 Medicare Part D claims totaling $698K in drug costs for 236 beneficiaries.
Where is Wesley Fairfield, MD, ECNU located? ▼
Wesley Fairfield, MD, ECNU is located at 144 STATE ST FL 4, Portland, ME, 04101. Phone: (207) 400-8500.
What is Wesley Fairfield, MD, ECNU's NPI number? ▼
Wesley Fairfield, MD, ECNU's National Provider Identifier (NPI) is 1437138955, issued on 01/12/2006.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 7,852 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,639 Medicare Part D claims per year.
What drugs does Wesley Fairfield, MD, ECNU prescribe most often? ▼
Based on 2023 Medicare Part D data, Wesley Fairfield, MD, ECNU's most frequently prescribed drugs include Levothyroxine Sodium, Methimazole, Alendronate Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Wesley Fairfield, MD, ECNU accept Medicare? ▼
Wesley Fairfield, MD, ECNU appears in CMS Medicare data with 923 Part D claims and 236 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Wesley Fairfield, MD, ECNU's credentials? ▼
Wesley Fairfield, MD, ECNU's NPI is 1437138955 with credentials MD, ECNU. 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
Compiled from official public sources by the PlainDoctor editorial team.