NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1538421938 DO
Verify on CMS → Matthew Libby, DO
Family Medicine Physician in Brewster, Massachusetts.
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
711
Medicare Part D claims · 154 beneficiaries · Family Medicine Physician avg: 3K
What the federal data shows
Matthew Libby, DO filed 711 Medicare Part D claims in 2023 as a Family Medicine Physician in Brewster, Massachusetts.
- 711
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥71st
- 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 1538421938 · Family Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1538421938
- ENUM-MID 2012
- TAX-MEGA 148K Family Medicine
- RX-LIGHT 711
- BOOK-LIGHT 2,196 in Massachusetts
- PHOTO-ENUM Trevor Wilde · 2012
Matthew Libby, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
711 ≥ 71st percentile 71% 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)
Matthew Libby, 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).
What does the federal data show about Matthew Libby, DO?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
711 79% vs specialty avg
Specialty distribution in Massachusetts
How Family Medicine Physician compares to other specialties among Massachusetts 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 | 1538421938 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 06/12/2012 |
Hospital and facility affiliations
Facilities where Matthew Libby, 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.
Duffy Health Center, Inc
Hyannis, MA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Massachusetts BORIM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Matthew Libby, DO. To verify Matthew Libby, DO's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
711
Total Claims
$57K
Total Drug Cost
154
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,788
- Total Day Supply
- 53,004
- Generic Drug Cost
- $16K
Patient Demographics
- Average Patient Age
- 72.8 years
- Avg HCC Risk Score
- 0.98
- Gender Split
- 49% female / 51% male
- Age Distribution
- <65: 12, 65-74: 84, 75-84: 46, 85+: 12
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Matthew Libby, DO prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
57 claims
- Lisinopril
Lisinopril
49 claims
- Amlodipine Besylate
Amlodipine Besylate
37 claims
- Omeprazole
Omeprazole
37 claims
- Levothyroxine Sodium
Levothyroxine Sodium
27 claims
- Sertraline Hcl
Sertraline Hcl
27 claims
- Tamsulosin Hcl
Tamsulosin Hcl
23 claims
- Losartan Potassium 22
Losartan Potassium
22 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 57 |
| Lisinopril | 49 |
| Amlodipine Besylate | 37 |
| Omeprazole | 37 |
| Levothyroxine Sodium | 27 |
| Sertraline Hcl | 27 |
| Tamsulosin Hcl | 23 |
| Losartan Potassium | 22 |
| Metoprolol Succinate | 22 |
| Simvastatin | 22 |
* 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 Matthew Libby, DO 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
Matthew Libby, DO's 711 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 Libby, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2012)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Libby.
One of 2,196 Family Medicine Physician providers enrolled in Massachusetts, 5 are shown here.
Dr. Salah Abass
M.D.
Methuen, MA
Dr. Sheila Abdallah
MD
Worcester, MA
Dr. Jonathan Abel
DO
Springfield, MA
Dr. Mohamed Abib
MD
Sturbridge, MA
Dr. Kevin Abraham
M.D.
Worcester, MA
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Matthew Libby, DO's specialty? ▼
Matthew Libby, DO specializes in Family Medicine Physician and practices in Brewster, Massachusetts. Credentials: DO.
How much does Matthew Libby, DO prescribe under Medicare Part D? ▼
In 2023, Matthew Libby, DO wrote 711 Medicare Part D claims totaling $57K in drug costs for 154 beneficiaries.
Where is Matthew Libby, DO located? ▼
Matthew Libby, DO is located at 125 UNDERPASS RD, Brewster, MA, 02631. Phone: (508) 625-6963.
What is Matthew Libby, DO's NPI number? ▼
Matthew Libby, DO's National Provider Identifier (NPI) is 1538421938, issued on 06/12/2012.
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 Matthew Libby, DO prescribe most often? ▼
Based on 2023 Medicare Part D data, Matthew Libby, DO's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Matthew Libby, DO accept Medicare? ▼
Matthew Libby, DO appears in CMS Medicare data with 711 Part D claims and 154 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Matthew Libby, DO's credentials? ▼
Matthew Libby, DO's NPI is 1538421938 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
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.