NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1386897817 M.D.
Verify on CMS → Matthew Parker, M.D.
Internal Medicine Physician in Worcester, 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 172,737 in Internal 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
1K
Medicare Part D claims · 256 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
97/100
▲ 14 pts above national avg 83.5 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Matthew Parker, M.D. reported a CMS MIPS final score of 97/100 - above the 83.5 national average - and filed 1,386 Medicare Part D claims in 2023.
- 97/100
- MIPS score · +14 vs avg
- 1K
- Part D claims, 2023
- 87%
- 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.
Federal trust snapshot
What official records show about Matthew Parker, M.D.
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1386897817), first enumerated 10/28/2008.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,386 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 97/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Matthew Parker, M.D.'s individual license status. Verify directly with the state medical board.
Source: BORIM annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1386897817 · Internal Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · MIPS-ELITE · RX-MID · BOOK-MID · PHOTO-FINISH
- NPI-10 1386897817
- ENUM-MID 2008
- TAX-MEGA 173K Internal Medicine
- MIPS-ELITE 97/100
- RX-MID 1,386
- BOOK-MID 7,862 in Massachusetts
- PHOTO-FINISH Adarsha Bajracharya · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Parker · this pr…
Parker · this provider
97 MIPS pts
- Raphael Jesin · …
Raphael Jesin
97 MIPS pts
- Adarsha Bajracha…
Adarsha Bajracharya
97 MIPS pts
- Breta Boots · near
Breta Boots
97 MIPS pts
- Timothy Cashman …
Timothy Cashman
97 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Matthew Parker, M.D.'s MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
97 ≥ 84th percentile 84% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Matthew Parker, M.D. sits
This provider among internal medicine physician peers
Across the 34,612 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Matthew Parker, M.D. writes more Part D claims than 61% of them and scores higher on MIPS quality than 84% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one internal medicine physician peer from a representative sample of 60; the gold marker is Matthew Parker, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Matthew Parker, M.D. 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).
What does the federal data show about Matthew Parker, M.D.?
High performer (top quartile)Primary specialty
Internal Medicine Physician
Medicare Part D claims
1,386 49% vs specialty avg
MIPS final score
97/100 13.5 pts vs avg
Specialty distribution in Massachusetts
How Internal Medicine Physician compares to other specialties among Massachusetts providers
Medicare quality performance, MIPS
Matthew Parker, M.D.'s 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 97/100
- vs 83.5 national avg · 2023 performance year
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 | 1386897817 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 10/28/2008 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
97.0218
Final Score
Measured-score avg: 83.5
78.0983
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Matthew Parker, 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.
Umass Memorial Medical Group Inc
Worcester, 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 Parker, M.D.. To verify Matthew Parker, M.D.'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.
Brand vs generic prescribing mix · Typical
Matthew Parker, M.D. - brand share 13.0%
Internal Medicine Physician average
13% brand-name claims vs 87% generic, on 1,386 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.
1,386
Total Claims
$257K
Total Drug Cost
256
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,734
- Total Day Supply
- 111,328
- Brand vs Generic
- 13% brand / 87% generic
- Brand Drug Cost
- $218K
- Generic Drug Cost
- $38K
Patient Demographics
- Average Patient Age
- 75.5 years
- Avg HCC Risk Score
- 1.72
- Gender Split
- 41% female / 59% male
- Age Distribution
- <65: 16, 65-74: 96, 75-84: 108, 85+: 36
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Matthew Parker, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Metoprolol Succinate
Metoprolol Succinate
192 claims
- Amlodipine Besylate
Amlodipine Besylate
145 claims
- Atorvastatin Calcium
Atorvastatin Calcium
143 claims
- Carvedilol
Carvedilol
86 claims
- Lisinopril 71
Lisinopril
71 claims
- Eliquis 63
Eliquis
63 claims
- Spironolactone 56
Spironolactone
56 claims
- Furosemide 47
Furosemide
47 claims
| Drug | Claims |
|---|---|
| Metoprolol Succinate | 192 |
| Amlodipine Besylate | 145 |
| Atorvastatin Calcium | 143 |
| Carvedilol | 86 |
| Lisinopril | 71 |
| Eliquis Apixaban | 63 |
| Spironolactone | 56 |
| Furosemide | 47 |
| Losartan Potassium | 46 |
| Isosorbide Mononitrate Er Isosorbide Mononitrate | 41 |
* 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 Matthew Parker, M.D. fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Matthew Parker, M.D.'s 1,386 claims are below the specialty average of 2,716.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Parker, both outside Massachusetts so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (97 here).
Same NPPES enumeration year (2008)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Internal Medicine Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Parker.
One of 7,862 Internal Medicine Physician providers enrolled in Massachusetts, 5 are shown here.
Dr. Nawal Aamir
MD
Worcester, MA
Zainab Abbas
Worcester, MA
Dr. Nooshin Abbasi
MD MPH
Newton, MA
Dr. Lauren Abbate
MD
Boston, MA
Dr. Bassima Abdallah
MD
Boston, MA
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Matthew Parker, M.D.'s specialty? ▼
Matthew Parker, M.D. specializes in Internal Medicine Physician and practices in Worcester, Massachusetts. Credentials: M.D..
How much does Matthew Parker, M.D. prescribe under Medicare Part D? ▼
In 2023, Matthew Parker, M.D. wrote 1,386 Medicare Part D claims totaling $257K in drug costs for 256 beneficiaries.
What is Matthew Parker, M.D.'s Medicare quality score? ▼
Matthew Parker, M.D. has a CMS MIPS Final Score of 97/100 (Quality: 78.1). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Matthew Parker, M.D. located? ▼
Matthew Parker, M.D. is located at 55 LAKE AVE N, Worcester, MA, 01655. Phone: (508) 334-3452.
What is Matthew Parker, M.D.'s NPI number? ▼
Matthew Parker, M.D.'s National Provider Identifier (NPI) is 1386897817, issued on 10/28/2008.
Does Matthew Parker, M.D. prescribe more brand-name or generic drugs? ▼
Matthew Parker, M.D.'s prescribing is 13% brand-name and 87% generic drugs by claim count, with $218K in brand drug costs.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 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 Matthew Parker, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Matthew Parker, M.D.'s most frequently prescribed drugs include Metoprolol Succinate, Amlodipine Besylate, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Matthew Parker, M.D. accept Medicare? ▼
Matthew Parker, M.D. appears in CMS Medicare data with 1,386 Part D claims and 256 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Matthew Parker, M.D.'s credentials? ▼
Matthew Parker, M.D.'s NPI is 1386897817 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.
- 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
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.