2026 NPPES data General Practice Physician NPI 1346280401 M.D.
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FREDERICK THOMAS, M.D.

General Practice Physician in LOS ANGELES, 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
4K
Medicare Part D claims · 179 beneficiaries · General Practice Physician avg: 3K
Generic prescribing
84%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$94.96
4 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

FREDERICK THOMAS, M.D. filed 4,262 Medicare Part D claims in 2023 as a General Practice Physician in LOS ANGELES, California, prescribing 84% generic.

4K
Part D claims, 2023
84%
generic prescribing
$94.96
industry payments (Sunshine Act)

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.

FREDERICK THOMAS, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

4,262 Top 8% higher than 92% 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%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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)

FREDERICK THOMAS, M.D. 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 FREDERICK THOMAS, M.D.?

Quality data not reported

NPI registry status

Active

Issued 06/07/2006

NPI 1346280401

Primary specialty

General Practice Physician

Mid-sized

16,677 US NPIs in this specialty

Medicare Part D claims

4,262 48% vs specialty avg

2023 prescription claims

Specialty avg: 2,872

Specialty distribution in California

How General Practice Physician compares to other specialties among California providers

California providers

General Practice Physician share within California

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

Specialty board-certification context

Estimated specialty board-certified rate — General Practice Physician (ABMS / AOA reference)

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

Est. board-certified rate (General Practice Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (General Practice 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).

FREDERICK THOMAS, M.D. appears in the CMS NPPES registry as a General Practice Physician provider holding M.D. credentials at 2500 W FLORENCE AVE, LOS ANGELES, CA, 90043, with a listed phone of (323) 778-6600. NPI 1346280401 was issued on 06/07/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what THOMAS 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 4,262 prescription claims written by this provider, covering 179 Medicare beneficiaries and totaling roughly $575K in drug spend, split 16% brand-name and 84% generic by claim count, with an opioid prescribing rate of 0.6%. 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.

General Practice Physician is a mid-sized specialty nationwide, with 16,677 enrolled providers across 56 states and an average of 2,872 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 W FLORENCE AVE
LOS ANGELES, CA 90043

Provider Details

NPI 1346280401
Specialty General Practice Physician
Credentials M.D.
Gender Male
NPI Issued 06/07/2006

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 FREDERICK THOMAS, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$95

Largest payer

Dexcom, Inc.

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 — 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 FREDERICK THOMAS, M.D.. To verify FREDERICK THOMAS, M.D.'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

FREDERICK THOMAS, M.D. — brand share 16.0%
Specialty average (est.)

16% brand-name claims vs 84% generic, on 4,262 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.

4,262
Total Claims
$575K
Total Drug Cost
179
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
8,542
Total Day Supply
248,276
Brand vs Generic
16% brand / 84% generic
Brand Drug Cost
$486K
Generic Drug Cost
$85K
Opioid Claims
27 (0.6% rate)
Antibiotic Claims
41

Patient Demographics

Average Patient Age
67.4 years
Avg HCC Risk Score
1.43
Gender Split
40% female / 60% male
Age Distribution
<65: 36, 65-74: 119, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What FREDERICK THOMAS, M.D. 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
Atorvastatin Calcium
341
Diclofenac Sodium
225
Metformin Hcl
211
Lisinopril
157
Amlodipine Besylate
155
Gabapentin
152
Omeprazole
117
Albuterol Sulfate Hfa
Albuterol Sulfate
108
Hydrochlorothiazide
96
Benazepril Hcl
86

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

General Practice Physician Overview

How FREDERICK THOMAS, M.D. fits within the General Practice Physician landscape nationally.

16,677
General Practice Physician Providers in US
56
States with General Practice Physician
2,872
Avg Claims per Provider

FREDERICK THOMAS, M.D.'s 4,262 claims are above the specialty average of 2,872.

Nearby General Practice Physician Providers in California

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

Compare General Practice Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is FREDERICK THOMAS, M.D.'s specialty?
FREDERICK THOMAS, M.D. specializes in General Practice Physician and practices in LOS ANGELES, California. Credentials: M.D..
How much does FREDERICK THOMAS, M.D. prescribe under Medicare Part D?
In 2023, FREDERICK THOMAS, M.D. wrote 4,262 Medicare Part D claims totaling $575K in drug costs for 179 beneficiaries.
Where is FREDERICK THOMAS, M.D. located?
FREDERICK THOMAS, M.D. is located at 2500 W FLORENCE AVE, LOS ANGELES, CA, 90043. Phone: (323) 778-6600.
What is FREDERICK THOMAS, M.D.'s NPI number?
FREDERICK THOMAS, M.D.'s National Provider Identifier (NPI) is 1346280401, issued on 06/07/2006.
Does FREDERICK THOMAS, M.D. prescribe more brand-name or generic drugs?
FREDERICK THOMAS, M.D.'s prescribing is 16% brand-name and 84% generic drugs by claim count, with $486K in brand drug costs.
Does FREDERICK THOMAS, M.D. prescribe opioids?
Yes, FREDERICK THOMAS, M.D. had 27 opioid claims in 2023 with an opioid prescribing rate of 0.6%.
How many General Practice Physician providers are there in the US?
There are 16,677 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,872 Medicare Part D claims per year.
What drugs does FREDERICK THOMAS, M.D. prescribe most often?
Based on 2023 Medicare Part D data, FREDERICK THOMAS, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Diclofenac Sodium, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does FREDERICK THOMAS, M.D. accept Medicare?
FREDERICK THOMAS, M.D. appears in CMS Medicare data with 4,262 Part D claims and 179 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify FREDERICK THOMAS, M.D.'s credentials?
FREDERICK THOMAS, M.D.'s NPI is 1346280401 with credentials M.D.. 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