NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1528411311 PA-C
Verify on CMS → William Felts, PA-C
Physician Assistant 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 150,974 in Physician Assistant, 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
131
Medicare Part D claims · 107 beneficiaries · Physician Assistant avg: 790
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
William Felts, PA-C filed 131 Medicare Part D claims in 2023 as a Physician Assistant in Worcester, Massachusetts.
- 131
- Part D claims, 2023
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.
William Felts, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
131 35th percentile higher than 35% 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
What does the federal data show about William Felts, PA-C?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
131 83% vs specialty avg
Specialty distribution in Massachusetts
How Physician Assistant 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 Physician Assistant. 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).
William Felts, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 123 SUMMER ST, Worcester, MA, 01608, with a listed phone of (781) 280-1695. NPI 1528411311 was issued on 07/18/2016.
Medicare Part D records for calendar year 2023 show 131 prescription claims written by this provider, covering 107 Medicare beneficiaries and totaling roughly $1K in drug spend, with an opioid prescribing rate of 14.5%.
Physician Assistant is a high-volume specialty nationwide, with 150,974 enrolled providers across 56 states and an average of 790 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 | 1528411311 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA-C |
| Gender | Male |
| NPI Issued | 07/18/2016 |
Hospital and facility affiliations
Facilities where William Felts, PA-C 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.
According to CMS billing records, William Felts, PA-C is affiliated with 4 Medicare-billing facilities across 2 states.
Atlantic Advanced Urgent Care
Mountain Lakes, NJ
Dimerhealth Medical Practice
Houston, TX
Hackettstown Emergency Medical Associates, LLC
Hackettstown, NJ
Newton Emergency Medical Associates LLC
Newton, NJ
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 William Felts, PA-C. To verify William Felts, PA-C'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.
131
Total Claims
$1K
Total Drug Cost
107
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 131
- Total Day Supply
- 995
- Generic Drug Cost
- $1K
- Opioid Claims
- 19 (14.5% rate)
- Antibiotic Claims
- 66
Patient Demographics
- Average Patient Age
- 71.4 years
- Avg HCC Risk Score
- 1.46
- Gender Split
- 64% female / 36% 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 |
|---|---|
| Cephalexin | 22 |
| Oxycodone Hcl | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How William Felts, PA-C fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
William Felts, PA-C's 131 claims are below the specialty average of 790.
Nearby Physician Assistant Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Felts.
Dr. Erin Abdallah
PA-C
Swansea, MA
Dr. Alexa Aboshar
PA-C
Tewksbury, MA
Dr. Bhraana Abraham
PA
Boston, MA
Dr. Keidelyn Abreu
PA
Lawrence, MA
Dr. Cheryl Acampora
PA
South Weymouth, MA
Compare Physician Assistant 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 Massachusetts medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Physician Assistant 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Massachusetts
Frequently Asked Questions
What is William Felts, PA-C's specialty? ▼
William Felts, PA-C specializes in Physician Assistant and practices in Worcester, Massachusetts. Credentials: PA-C.
How much does William Felts, PA-C prescribe under Medicare Part D? ▼
In 2023, William Felts, PA-C wrote 131 Medicare Part D claims totaling $1K in drug costs for 107 beneficiaries.
Where is William Felts, PA-C located? ▼
William Felts, PA-C is located at 123 SUMMER ST, Worcester, MA, 01608. Phone: (781) 280-1695.
What is William Felts, PA-C's NPI number? ▼
William Felts, PA-C's National Provider Identifier (NPI) is 1528411311, issued on 07/18/2016.
Does William Felts, PA-C prescribe opioids? ▼
Yes, William Felts, PA-C had 19 opioid claims in 2023 with an opioid prescribing rate of 14.5%.
How many Physician Assistant providers are there in the US? ▼
There are 150,974 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does William Felts, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, William Felts, PA-C's most frequently prescribed drugs include Cephalexin, Oxycodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Felts, PA-C accept Medicare? ▼
William Felts, PA-C appears in CMS Medicare data with 131 Part D claims and 107 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Felts, PA-C's credentials? ▼
William Felts, PA-C's NPI is 1528411311 with credentials PA-C. 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.
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.