2026 NPPES data Medical Physician Assistant NPI 1750539391 PA-C
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TARQUIN WILLIAMS, PA-C

Medical Physician Assistant in CATHEDRAL CITY, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
773
Medicare Part D claims · 514 beneficiaries · Medical Physician Assistant avg: 1K

What the federal data shows

TARQUIN WILLIAMS, PA-C filed 773 Medicare Part D claims in 2023 as a Medical Physician Assistant in CATHEDRAL CITY, California.

773
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.

TARQUIN WILLIAMS, PA-C's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

773 Top 29% higher than 71% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). This entry sits in this band. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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 TARQUIN WILLIAMS, PA-C?

Quality data not reported

NPI registry status

Active

Issued 09/08/2008

NPI 1750539391

Primary specialty

Medical Physician Assistant

Mid-sized

40,527 US NPIs in this specialty

Medicare Part D claims

773 28% vs specialty avg

2023 prescription claims

Specialty avg: 1,077

Specialty distribution in California

How Medical Physician Assistant compares to other specialties among California providers

California providers

Medical Physician Assistant share within California

1. Medical Physician Assistant42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Medical Physician Assistant share within California

Specialty board-certification context

Estimated specialty board-certified rate — Medical Physician Assistant (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Medical Physician Assistant ABMS/AOA estimate

Est. board-certified rate (Medical Physician Assistant) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Medical Physician Assistant) — ABMS / AOA estimate

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).

TARQUIN WILLIAMS, PA-C appears in the CMS NPPES registry as a Medical Physician Assistant provider holding PA-C credentials at 69175 RAMON RD BLDG A, CATHEDRAL CITY, CA, 92234, with a listed phone of (760) 321-6776. NPI 1750539391 was issued on 09/08/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WILLIAMS 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 773 prescription claims written by this provider, covering 514 Medicare beneficiaries and totaling roughly $13K in drug spend, with an opioid prescribing rate of 6.6%. 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.

Medical Physician Assistant is a mid-sized specialty nationwide, with 40,527 enrolled providers across 55 states and an average of 1,077 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

69175 RAMON RD BLDG A
CATHEDRAL CITY, CA 92234

Provider Details

NPI 1750539391
Specialty Medical Physician Assistant
Credentials PA-C
Gender Male
NPI Issued 09/08/2008

Hospital and facility affiliations

Facilities where TARQUIN WILLIAMS, 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.

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP
RIVERSIDE, CA

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 TARQUIN WILLIAMS, PA-C. To verify TARQUIN WILLIAMS, PA-C's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

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.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

773
Total Claims
$13K
Total Drug Cost
514
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
787
Total Day Supply
8,908
Generic Drug Cost
$7K
Opioid Claims
51 (6.6% rate)
Antibiotic Claims
298

Patient Demographics

Average Patient Age
72.3 years
Avg HCC Risk Score
1.11
Gender Split
60% female / 40% male
Age Distribution
<65: 49, 65-74: 270, 75-84: 163, 85+: 32

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What TARQUIN WILLIAMS, PA-C prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Prednisone
99
Azithromycin
56
Doxycycline Monohydrate
52
Meloxicam
46
Cephalexin
45
Cefadroxil
40
Ibuprofen
39
Acetaminophen-Codeine
Acetaminophen With Codeine
35
Albuterol Sulfate Hfa
Albuterol Sulfate
32
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
28

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Medical Physician Assistant Overview

How TARQUIN WILLIAMS, PA-C fits within the Medical Physician Assistant landscape nationally.

40,527
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider

TARQUIN WILLIAMS, PA-C's 773 claims are below the specialty average of 1,077.

Nearby Medical Physician Assistant Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as WILLIAMS.

Compare Medical Physician Assistant nationally: see state-by-state distribution →

Frequently Asked Questions

What is TARQUIN WILLIAMS, PA-C's specialty?
TARQUIN WILLIAMS, PA-C specializes in Medical Physician Assistant and practices in CATHEDRAL CITY, California. Credentials: PA-C.
How much does TARQUIN WILLIAMS, PA-C prescribe under Medicare Part D?
In 2023, TARQUIN WILLIAMS, PA-C wrote 773 Medicare Part D claims totaling $13K in drug costs for 514 beneficiaries.
Where is TARQUIN WILLIAMS, PA-C located?
TARQUIN WILLIAMS, PA-C is located at 69175 RAMON RD BLDG A, CATHEDRAL CITY, CA, 92234. Phone: (760) 321-6776.
What is TARQUIN WILLIAMS, PA-C's NPI number?
TARQUIN WILLIAMS, PA-C's National Provider Identifier (NPI) is 1750539391, issued on 09/08/2008.
Does TARQUIN WILLIAMS, PA-C prescribe opioids?
Yes, TARQUIN WILLIAMS, PA-C had 51 opioid claims in 2023 with an opioid prescribing rate of 6.6%.
How many Medical Physician Assistant providers are there in the US?
There are 40,527 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,077 Medicare Part D claims per year.
What drugs does TARQUIN WILLIAMS, PA-C prescribe most often?
Based on 2023 Medicare Part D data, TARQUIN WILLIAMS, PA-C's most frequently prescribed drugs include Prednisone, Azithromycin, Doxycycline Monohydrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does TARQUIN WILLIAMS, PA-C accept Medicare?
TARQUIN WILLIAMS, PA-C appears in CMS Medicare data with 773 Part D claims and 514 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify TARQUIN WILLIAMS, PA-C's credentials?
TARQUIN WILLIAMS, PA-C's NPI is 1750539391 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

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