2026 NPPES data Family Medicine Physician NPI 1477736965
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NEARY ARPAJIRAKUL

Family Medicine Physician in MARTINEZ, 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
415
Medicare Part D claims · 210 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
80%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

NEARY ARPAJIRAKUL filed 415 Medicare Part D claims in 2023 as a Family Medicine Physician in MARTINEZ, California, prescribing 80% generic.

415
Part D claims, 2023
80%
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.

NEARY ARPAJIRAKUL's Medicare Part D volume vs every U.S. prescriber

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

415 Top 38% higher than 62% 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%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 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

Board-eligible specialty (heuristic — not verified)

NEARY ARPAJIRAKUL practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about NEARY ARPAJIRAKUL?

Quality data not reported

NPI registry status

Active

Issued 12/07/2007

NPI 1477736965

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

415 88% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in California

How Family Medicine Physician compares to other specialties among California providers

California providers

Family Medicine Physician share within California

1. Family Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Family Medicine Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Family Medicine Physician (ABMS / AOA reference)

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

Est. board-certified rate (Family Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Family Medicine Physician) — 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).

NEARY ARPAJIRAKUL appears in the CMS NPPES registry as a Family Medicine Physician provider at 2500 ALHAMBRA AVE, MARTINEZ, CA, 94553, with a listed phone of (925) 370-5110. NPI 1477736965 was issued on 12/07/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ARPAJIRAKUL 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 415 prescription claims written by this provider, covering 210 Medicare beneficiaries and totaling roughly $77K in drug spend, split 20% brand-name and 80% generic by claim count, with an opioid prescribing rate of 2.9%. 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.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

2500 ALHAMBRA AVE
MARTINEZ, CA 94553

Provider Details

NPI 1477736965
Specialty Family Medicine Physician
Gender Male
NPI Issued 12/07/2007

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 NEARY ARPAJIRAKUL. To verify NEARY ARPAJIRAKUL'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.

Brand vs generic prescribing mix · Typical

NEARY ARPAJIRAKUL — brand share 20.0%
Specialty average (est.)

20% brand-name claims vs 80% generic, on 415 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.

415
Total Claims
$77K
Total Drug Cost
210
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
767
Total Day Supply
19,831
Brand vs Generic
20% brand / 80% generic
Brand Drug Cost
$64K
Generic Drug Cost
$11K
Opioid Claims
12 (2.9% rate)
Antibiotic Claims
27

Patient Demographics

Average Patient Age
67.1 years
Avg HCC Risk Score
1.58
Gender Split
66% female / 34% male
Age Distribution
<65: 64, 65-74: 97, 75-84: 37, 85+: 12

Top Prescribed Drugs (Medicare Part D)

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

What NEARY ARPAJIRAKUL 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
Paxlovid (Eua)
Nirmatrelvir/Ritonavir
39
Atorvastatin Calcium
19
Furosemide
15
Ibuprofen
12
Levemir
Insulin Detemir
12
Losartan Potassium
11
Metformin Hcl
11

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

Family Medicine Physician Overview

How NEARY ARPAJIRAKUL fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

NEARY ARPAJIRAKUL's 415 claims are below the specialty average of 3,418.

Nearby Family Medicine Physician Providers in California

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

Compare Family Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is NEARY ARPAJIRAKUL's specialty?
NEARY ARPAJIRAKUL specializes in Family Medicine Physician and practices in MARTINEZ, California.
How much does NEARY ARPAJIRAKUL prescribe under Medicare Part D?
In 2023, NEARY ARPAJIRAKUL wrote 415 Medicare Part D claims totaling $77K in drug costs for 210 beneficiaries.
Where is NEARY ARPAJIRAKUL located?
NEARY ARPAJIRAKUL is located at 2500 ALHAMBRA AVE, MARTINEZ, CA, 94553. Phone: (925) 370-5110.
What is NEARY ARPAJIRAKUL's NPI number?
NEARY ARPAJIRAKUL's National Provider Identifier (NPI) is 1477736965, issued on 12/07/2007.
Does NEARY ARPAJIRAKUL prescribe more brand-name or generic drugs?
NEARY ARPAJIRAKUL's prescribing is 20% brand-name and 80% generic drugs by claim count, with $64K in brand drug costs.
Does NEARY ARPAJIRAKUL prescribe opioids?
Yes, NEARY ARPAJIRAKUL had 12 opioid claims in 2023 with an opioid prescribing rate of 2.9%.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does NEARY ARPAJIRAKUL prescribe most often?
Based on 2023 Medicare Part D data, NEARY ARPAJIRAKUL's most frequently prescribed drugs include Paxlovid (Eua), Atorvastatin Calcium, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does NEARY ARPAJIRAKUL accept Medicare?
NEARY ARPAJIRAKUL appears in CMS Medicare data with 415 Part D claims and 210 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify NEARY ARPAJIRAKUL's credentials?
NEARY ARPAJIRAKUL's NPI is 1477736965. 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