JOEL GREY, PA-C
Physician Assistant in DAVIS, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.
What the federal data shows
JOEL GREY, PA-C filed 873 Medicare Part D claims in 2023 as a Physician Assistant in DAVIS, California, prescribing 83% generic.
- 873
- Part D claims, 2023
- 83%
- generic prescribing
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.
JOEL GREY, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023 — across all CMS prescribers nationally
873 Top 27% higher than 73% 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 JOEL GREY, PA-C?
Quality data not reportedPrimary specialty
Medicare Part D claims
Specialty distribution in California
How Physician Assistant compares to other specialties among California providers
Physician Assistant share within California
Physician Assistant is one of the more visible NUCC categories in California
Each bar reflects the share of in-state providers whose primary NUCC taxonomy matches the specialty. Long tail of ~690 NUCC codes folded into "Other" to keep the comparison legible.
Specialty board-certification context
Estimated specialty board-certified rate — Physician Assistant (ABMS / AOA reference)
- Est. board-certified rate
- 78%
- Physician Assistant ABMS/AOA estimate
Est. board-certified rate (Physician Assistant) — ABMS / AOA estimate
Verify credentials
- Verify via ABMS free public lookup
- Verify via AOA osteopathic boards
- Specialty volume Physician Assistant US NPIs
Specialty board-certified rate — Physician Assistant estimate
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus Maintenance of Certification cycles. CMS does not publish a per-provider board-certification field; the figure shown is the specialty-level estimated rate from ABMS / AOA reference data.
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).
JOEL GREY, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 635 ANDERSON RD STE 10, DAVIS, CA, 95616, with a listed phone of (530) 758-1122. NPI 1285989988 was issued on 07/18/2012. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GREY most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.
Medicare Part D records for calendar year 2023 show 873 prescription claims written by this provider, covering 244 Medicare beneficiaries and totaling roughly $114K in drug spend, split 17% brand-name and 83% generic by claim count, with an opioid prescribing rate of 7.0%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.
Physician Assistant is a high-volume specialty nationwide, with 149,975 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 | 1285989988 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA-C |
| Gender | Male |
| NPI Issued | 07/18/2012 |
Verify this provider's license
PlainDoctor pulls this profile from the CMS NPPES public registry. Confirm JOEL GREY, PA-C's current license status, disciplinary history, and board certifications with the Medical Board of California in California before relying on this page for a clinical or care decision.
How we sourced this profile
Hospital and facility affiliations
Facilities where JOEL GREY, 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.
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 — California MBC 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 ~150K California medical licensees in 2023 — they are NOT specific to JOEL GREY, PA-C. To verify JOEL GREY, PA-C's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
17% brand-name claims vs 83% generic, on 873 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.
Prescribing Breakdown
- 30-Day Fills
- 1,524
- Total Day Supply
- 41,602
- Brand vs Generic
- 17% brand / 83% generic
- Brand Drug Cost
- $97K
- Generic Drug Cost
- $17K
- Opioid Claims
- 61 (7.0% rate)
- Antibiotic Claims
- 43
Patient Demographics
- Average Patient Age
- 75.1 years
- Avg HCC Risk Score
- 1.06
- Gender Split
- 62% female / 38% male
- Age Distribution
- <65: 22, 65-74: 80, 75-84: 109, 85+: 33
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What JOEL GREY, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
43 claims
- Losartan Potassium
Losartan Potassium
36 claims
- Amlodipine Besylate
Amlodipine Besylate
29 claims
- Atorvastatin Calcium
Atorvastatin Calcium
27 claims
- Lorazepam
Lorazepam
24 claims
- Eliquis
Eliquis
23 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
22 claims
- Zolpidem Tartrate
Zolpidem Tartrate
22 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 43 |
| Losartan Potassium | 36 |
| Amlodipine Besylate | 29 |
| Atorvastatin Calcium | 27 |
| Lorazepam | 24 |
| Eliquis Apixaban | 23 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 22 |
| Zolpidem Tartrate | 22 |
| Valacyclovir Valacyclovir Hcl | 21 |
| Lisinopril | 20 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How JOEL GREY, PA-C fits within the Physician Assistant landscape nationally.
JOEL GREY, PA-C's 873 claims are above the specialty average of 790.
Nearby Physician Assistant Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as GREY.
Compare Physician Assistant nationally: see state-by-state distribution →
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Frequently Asked Questions
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Does JOEL GREY, PA-C prescribe opioids? ▼
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Data Sources
- 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