NPI registry status
Active
2026 NPPES data Surgical Physician Assistant NPI 1164841102 PA-C
Verify on CMS → Gregory Clark, PA-C
Surgical Physician Assistant in Indianapolis, Indiana.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,119 in Surgical 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
109
Medicare Part D claims · 25 beneficiaries · Surgical Physician Assistant avg: 316
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Gregory Clark, PA-C filed 109 Medicare Part D claims in 2023 as a Surgical Physician Assistant in Indianapolis, Indiana.
- 109
- 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.
Gregory Clark, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
109 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 Gregory Clark, PA-C?
Quality data not reportedPrimary specialty
Surgical Physician Assistant
Medicare Part D claims
109 66% vs specialty avg
Specialty distribution in Indiana
How Surgical Physician Assistant compares to other specialties among Indiana 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 Surgical 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).
Gregory Clark, PA-C appears in the CMS NPPES registry as a Surgical Physician Assistant provider holding PA-C credentials at 8433 HARCOURT RD STE 100, Indianapolis, IN, 46260, with a listed phone of (317) 583-7600. NPI 1164841102 was issued on 04/07/2014.
Medicare Part D records for calendar year 2023 show 109 prescription claims written by this provider, covering 25 Medicare beneficiaries and totaling roughly $3K in drug spend.
Surgical Physician Assistant is a mid-sized specialty nationwide, with 16,119 enrolled providers across 54 states and an average of 316 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 | 1164841102 |
|---|---|
| Specialty | Surgical Physician Assistant |
| Credentials | PA-C |
| Gender | Male |
| NPI Issued | 04/07/2014 |
Hospital and facility affiliations
Facilities where Gregory Clark, 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.
Wake Forest University Health Sciences
High Point, NC
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.
109
Total Claims
$3K
Total Drug Cost
25
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 215
- Total Day Supply
- 5,890
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 72.2 years
- Avg HCC Risk Score
- 1.19
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Metoprolol Succinate | 13 |
| Atorvastatin Calcium | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Surgical Physician Assistant Overview
How Gregory Clark, PA-C fits within the Surgical Physician Assistant landscape nationally.
16,119
Surgical Physician Assistant Providers in US
54
States with Surgical Physician Assistant
316
Avg Claims per Provider
Gregory Clark, PA-C's 109 claims are below the specialty average of 316.
Nearby Surgical Physician Assistant Providers in Indiana
Other clinicians with the same primary specialty enrolled in Indiana, drawn from the same CMS NPPES roster as Clark.
Dr. Sarah Adams
PA
Indianapolis, IN
Dr. Joshua Allen
PA-C
Chesterton, IN
Davina Ananias
Indianapolis, IN
Jessica Ansara
Carmel, IN
Dr. Jessica Ash
PA-C
Carmel, IN
Compare Surgical 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 Indiana medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Surgical 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
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How to Find a Doctor
Step-by-step guide to choosing a provider
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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 Indiana
Frequently Asked Questions
What is Gregory Clark, PA-C's specialty? ▼
Gregory Clark, PA-C specializes in Surgical Physician Assistant and practices in Indianapolis, Indiana. Credentials: PA-C.
How much does Gregory Clark, PA-C prescribe under Medicare Part D? ▼
In 2023, Gregory Clark, PA-C wrote 109 Medicare Part D claims totaling $3K in drug costs for 25 beneficiaries.
Where is Gregory Clark, PA-C located? ▼
Gregory Clark, PA-C is located at 8433 HARCOURT RD STE 100, Indianapolis, IN, 46260. Phone: (317) 583-7600.
What is Gregory Clark, PA-C's NPI number? ▼
Gregory Clark, PA-C's National Provider Identifier (NPI) is 1164841102, issued on 04/07/2014.
How many Surgical Physician Assistant providers are there in the US? ▼
There are 16,119 Surgical Physician Assistant providers across 54 states in the US. The average Surgical Physician Assistant provider writes 316 Medicare Part D claims per year.
What drugs does Gregory Clark, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Gregory Clark, PA-C's most frequently prescribed drugs include Metoprolol Succinate, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gregory Clark, PA-C accept Medicare? ▼
Gregory Clark, PA-C appears in CMS Medicare data with 109 Part D claims and 25 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Clark, PA-C's credentials? ▼
Gregory Clark, PA-C's NPI is 1164841102 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.