NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1326774563 PA-C
Verify on CMS → Gregory Sergeant, PA-C
Physician Assistant in N Chelmsford, 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
495
Medicare Part D claims · 166 beneficiaries · Physician Assistant avg: 790
Generic prescribing
93%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$255.9
2 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Gregory Sergeant, PA-C filed 495 Medicare Part D claims in 2023 as a Physician Assistant in N Chelmsford, Massachusetts, prescribing 93% generic.
- 495
- Part D claims, 2023
- 93%
- generic prescribing
- $255.9
- industry payments (Sunshine Act)
- ≥62nd
- 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 1326774563 · Physician Assistant
NPI-10 · ENUM-RECENT · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1326774563
- ENUM-RECENT 2022
- TAX-MEGA 151K Physician Assistant
- RX-LIGHT 495
- BOOK-LIGHT 4,313 in Massachusetts
- PHOTO-ENUM Taylor Mucci · 2022
Gregory Sergeant, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
495 ≥ 62nd percentile 62% 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
What does the federal data show about Gregory Sergeant, PA-C?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
495 37% 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).
Practice Address
Provider Details
| NPI | 1326774563 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA-C |
| Gender | Male |
| NPI Issued | 07/29/2022 |
Hospital and facility affiliations
Facilities where Gregory Sergeant, 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.
Orthopaedic Surgical Associates OF Lowell, P.C.
North Chelmsford, 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).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Gregory Sergeant, PA-C. Source: openpaymentsdata.cms.gov.
Total received
$256
Largest payer
Pacira Pharmaceuticals Incorporated
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
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 Gregory Sergeant, PA-C. To verify Gregory Sergeant, 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.
Brand vs generic prescribing mix · Generic-heavy
Gregory Sergeant, PA-C - brand share 7.0%
Physician Assistant average
7% brand-name claims vs 93% generic, on 495 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.
495
Total Claims
$7K
Total Drug Cost
166
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 528
- Total Day Supply
- 7,701
- Brand vs Generic
- 7% brand / 93% generic
- Brand Drug Cost
- $4K
- Generic Drug Cost
- $3K
- Opioid Claims
- 212 (42.8% rate)
- Antibiotic Claims
- 49
Patient Demographics
- Average Patient Age
- 69.9 years
- Avg HCC Risk Score
- 0.97
- Gender Split
- 68% female / 32% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Gregory Sergeant, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Oxycodone Hcl
Oxycodone Hcl
83 claims
- Tramadol Hcl
Tramadol Hcl
78 claims
- Gabapentin
Gabapentin
72 claims
- Hydromorphone Hcl
Hydromorphone Hcl
41 claims
- Celecoxib
Celecoxib
37 claims
- Alprazolam 29
Alprazolam
29 claims
- Amoxicillin 26
Amoxicillin
26 claims
- Meloxicam 18
Meloxicam
18 claims
| Drug | Claims |
|---|---|
| Oxycodone Hcl | 83 |
| Tramadol Hcl | 78 |
| Gabapentin | 72 |
| Hydromorphone Hcl | 41 |
| Celecoxib | 37 |
| Alprazolam | 29 |
| Amoxicillin | 26 |
| Meloxicam | 18 |
| Tizanidine Hcl | 18 |
| Clindamycin Hcl | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Gregory Sergeant, 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
Gregory Sergeant, PA-C's 495 claims are below the specialty average of 790.
Nationwide Physician Assistant peers with similar MIPS or enrollment year
Two federal-record peer sets for Sergeant, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2022)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Physician Assistant Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Sergeant.
One of 4,313 Physician Assistant providers enrolled in Massachusetts, 5 are shown here.
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 →
Frequently Asked Questions
What is Gregory Sergeant, PA-C's specialty? ▼
Gregory Sergeant, PA-C specializes in Physician Assistant and practices in N Chelmsford, Massachusetts. Credentials: PA-C.
How much does Gregory Sergeant, PA-C prescribe under Medicare Part D? ▼
In 2023, Gregory Sergeant, PA-C wrote 495 Medicare Part D claims totaling $7K in drug costs for 166 beneficiaries.
Where is Gregory Sergeant, PA-C located? ▼
Gregory Sergeant, PA-C is located at 14 RESEARCH PL, N Chelmsford, MA, 01863. Phone: (978) 454-0706.
What is Gregory Sergeant, PA-C's NPI number? ▼
Gregory Sergeant, PA-C's National Provider Identifier (NPI) is 1326774563, issued on 07/29/2022.
Does Gregory Sergeant, PA-C prescribe more brand-name or generic drugs? ▼
Gregory Sergeant, PA-C's prescribing is 7% brand-name and 93% generic drugs by claim count, with $4K in brand drug costs.
Does Gregory Sergeant, PA-C prescribe opioids? ▼
Yes, Gregory Sergeant, PA-C had 212 opioid claims in 2023 with an opioid prescribing rate of 42.8%.
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 Gregory Sergeant, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Gregory Sergeant, PA-C's most frequently prescribed drugs include Oxycodone Hcl, Tramadol Hcl, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gregory Sergeant, PA-C accept Medicare? ▼
Gregory Sergeant, PA-C appears in CMS Medicare data with 495 Part D claims and 166 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Sergeant, PA-C's credentials? ▼
Gregory Sergeant, PA-C's NPI is 1326774563 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
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.