NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1245341445 M.D.
Verify on CMS → Long Thao, M.D.
Family Medicine Physician in Merced, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in Family Medicine Physician, 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
2K
Medicare Part D claims · 226 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
83%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$177.73
4 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Long Thao, M.D. filed 2,373 Medicare Part D claims in 2023 as a Family Medicine Physician in Merced, California, prescribing 83% generic.
- 2K
- Part D claims, 2023
- 83%
- generic prescribing
- $177.73
- 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.
Long Thao, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,373 Top 14% higher than 86% 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
◑
Board-eligible specialty (heuristic, not verified)
Long Thao, 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 Long Thao, M.D.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
2,373 31% vs specialty avg
Specialty distribution in California
How Family Medicine Physician compares to other specialties among California 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 Family Medicine Physician. 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).
Long Thao, M.D. appears in the CMS NPPES registry as a Family Medicine Physician provider holding M.D. credentials at 700 W OLIVE AVE, Merced, CA, 95348, with a listed phone of (209) 384-8426. NPI 1245341445 was issued on 08/31/2006.
Medicare Part D records for calendar year 2023 show 2,373 prescription claims written by this provider, covering 226 Medicare beneficiaries and totaling roughly $327K in drug spend, split 15% brand-name and 83% generic by claim count, with an opioid prescribing rate of 0.5%.
Family Medicine Physician is a high-volume specialty nationwide, with 147,760 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
Provider Details
| NPI | 1245341445 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/31/2006 |
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 Long Thao, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$178
Largest payer
AstraZeneca Pharmaceuticals LP
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 Long Thao, M.D.. To verify Long Thao, 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
Long Thao, M.D. - brand share 15.0%
Family Medicine Physician average
15% brand-name claims vs 83% generic, on 2,373 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.
2,373
Total Claims
$327K
Total Drug Cost
226
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,597
- Total Day Supply
- 162,635
- Brand vs Generic
- 15% brand / 83% generic
- Brand Drug Cost
- $251K
- Generic Drug Cost
- $74K
- Opioid Claims
- 13 (0.5% rate)
- Antibiotic Claims
- 57
Patient Demographics
- Average Patient Age
- 73.5 years
- Avg HCC Risk Score
- 1.46
- Gender Split
- 53% female / 47% male
- Age Distribution
- <65: 26, 65-74: 94, 75-84: 77, 85+: 29
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Long Thao, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
275 claims
- Amlodipine Besylate
Amlodipine Besylate
195 claims
- Gabapentin
Gabapentin
121 claims
- Metformin Hcl
Metformin Hcl
110 claims
- Losartan Potassium 90
Losartan Potassium
90 claims
- Lisinopril 70
Lisinopril
70 claims
- Furosemide 67
Furosemide
67 claims
- Carvedilol 62
Carvedilol
62 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 275 |
| Amlodipine Besylate | 195 |
| Gabapentin | 121 |
| Metformin Hcl | 110 |
| Losartan Potassium | 90 |
| Lisinopril | 70 |
| Furosemide | 67 |
| Carvedilol | 62 |
| Hydrochlorothiazide | 62 |
| Levothyroxine Sodium | 58 |
* 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 Long Thao, M.D. fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Long Thao, M.D.'s 2,373 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 Thao.
Dr. Omer Aba-Omer
MD
Santa Monica, CA
Dr. Michelle Ababa
MD
Wilmington, CA
Dr. Anna Tzeitel Abalos
MD
Roseville, CA
Dr. Adan Abarca
MD
Anaheim, CA
Dr. Lorraine Abate
M.D.
Sacramento, CA
Compare Family Medicine Physician 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 California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Family Medicine Physician 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.
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Frequently Asked Questions
What is Long Thao, M.D.'s specialty? ▼
Long Thao, M.D. specializes in Family Medicine Physician and practices in Merced, California. Credentials: M.D..
How much does Long Thao, M.D. prescribe under Medicare Part D? ▼
In 2023, Long Thao, M.D. wrote 2,373 Medicare Part D claims totaling $327K in drug costs for 226 beneficiaries.
Where is Long Thao, M.D. located? ▼
Long Thao, M.D. is located at 700 W OLIVE AVE, Merced, CA, 95348. Phone: (209) 384-8426.
What is Long Thao, M.D.'s NPI number? ▼
Long Thao, M.D.'s National Provider Identifier (NPI) is 1245341445, issued on 08/31/2006.
Does Long Thao, M.D. prescribe more brand-name or generic drugs? ▼
Long Thao, M.D.'s prescribing is 15% brand-name and 83% generic drugs by claim count, with $251K in brand drug costs.
Does Long Thao, M.D. prescribe opioids? ▼
Yes, Long Thao, M.D. had 13 opioid claims in 2023 with an opioid prescribing rate of 0.5%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 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 Long Thao, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Long Thao, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Long Thao, M.D. accept Medicare? ▼
Long Thao, M.D. appears in CMS Medicare data with 2,373 Part D claims and 226 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Long Thao, M.D.'s credentials? ▼
Long Thao, M.D.'s NPI is 1245341445 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
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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.