NPI registry status
Active
2026 NPPES data Student in an Organized Health Care Education/Training Program NPI 1306074687 D.O.
Verify on CMS → Dien Ton-That, D.O.
Student in an Organized Health Care Education/Training Program in Orange, 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 331,761 in Student in an Organized Health Care Education/Training Program, 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
373
Medicare Part D claims · 136 beneficiaries · Student in an Organized Health Care Education/Training Program avg: 459
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Dien Ton-That, D.O. filed 373 Medicare Part D claims in 2023 as a Student in an Organized Health Care Education/Training Program in Orange, California.
- 373
- 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.
Dien Ton-That, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
373 Top 43% higher than 57% 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 Dien Ton-That, D.O.?
Quality data not reportedPrimary specialty
Student in an Organized Health Care Education/Training Program
Medicare Part D claims
373 19% vs specialty avg
Specialty distribution in California
How Student in an Organized Health Care Education/Training Program 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 Student in an Organized Health Care Education/Training Program. 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).
Dien Ton-That, D.O. appears in the CMS NPPES registry as a Student in an Organized Health Care Education/Training Program provider holding D.O. credentials at 101 THE CITY DR S, Orange, CA, 92868, with a listed phone of (714) 456-5691. NPI 1306074687 was issued on 06/25/2009.
Medicare Part D records for calendar year 2023 show 373 prescription claims written by this provider, covering 136 Medicare beneficiaries and totaling roughly $19K in drug spend, with an opioid prescribing rate of 4.3%.
Student in an Organized Health Care Education/Training Program is a high-volume specialty nationwide, with 331,761 enrolled providers across 55 states and an average of 459 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 | 1306074687 |
|---|---|
| Specialty | Student in an Organized Health Care Education/Training Program |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 06/25/2009 |
Hospital and facility affiliations
Facilities where Dien Ton-That, D.O. 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
Ontario, 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 Dien Ton-That, D.O.. To verify Dien Ton-That, D.O.'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.
373
Total Claims
$19K
Total Drug Cost
136
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 693
- Total Day Supply
- 17,713
- Generic Drug Cost
- $6K
- Opioid Claims
- 16 (4.3% rate)
- Antibiotic Claims
- 86
Patient Demographics
- Average Patient Age
- 76.5 years
- Avg HCC Risk Score
- 2.65
- Gender Split
- 55% female / 45% male
- Age Distribution
- <65: 11, 65-74: 44, 75-84: 52, 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 Dien Ton-That, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Cefpodoxime Proxetil
Cefpodoxime Proxetil
42 claims
- Azithromycin
Azithromycin
21 claims
- Atorvastatin Calcium
Atorvastatin Calcium
19 claims
- Pantoprazole Sodium 16
Pantoprazole Sodium
16 claims
- Furosemide 14
Furosemide
14 claims
- Pradaxa 13
Pradaxa
13 claims
- Clopidogrel 12
Clopidogrel
12 claims
- Bisoprolol Fumarate 11
Bisoprolol Fumarate
11 claims
| Drug | Claims |
|---|---|
| Cefpodoxime Proxetil | 42 |
| Azithromycin | 21 |
| Atorvastatin Calcium | 19 |
| Pantoprazole Sodium | 16 |
| Furosemide | 14 |
| Pradaxa Dabigatran Etexilate Mesylate | 13 |
| Clopidogrel Clopidogrel Bisulfate | 12 |
| Bisoprolol Fumarate | 11 |
| Hydralazine Hcl | 11 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Student in an Organized Health Care Education/Training Program in CA →
All providers in California →
Compare specialties →
Student in an Organized Health Care Education/Training Program Overview
How Dien Ton-That, D.O. fits within the Student in an Organized Health Care Education/Training Program landscape nationally.
331,761
Student in an Organized Health Care Education/Training Program Providers in US
55
States with Student in an Organized Health Care Education/Training Program
459
Avg Claims per Provider
Dien Ton-That, D.O.'s 373 claims are below the specialty average of 459.
Nearby Student in an Organized Health Care Education/Training Program Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Ton-That.
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 Student in an Organized Health Care Education/Training Program 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 Dien Ton-That, D.O.'s specialty? ▼
Dien Ton-That, D.O. specializes in Student in an Organized Health Care Education/Training Program and practices in Orange, California. Credentials: D.O..
How much does Dien Ton-That, D.O. prescribe under Medicare Part D? ▼
In 2023, Dien Ton-That, D.O. wrote 373 Medicare Part D claims totaling $19K in drug costs for 136 beneficiaries.
Where is Dien Ton-That, D.O. located? ▼
Dien Ton-That, D.O. is located at 101 THE CITY DR S, Orange, CA, 92868. Phone: (714) 456-5691.
What is Dien Ton-That, D.O.'s NPI number? ▼
Dien Ton-That, D.O.'s National Provider Identifier (NPI) is 1306074687, issued on 06/25/2009.
Does Dien Ton-That, D.O. prescribe opioids? ▼
Yes, Dien Ton-That, D.O. had 16 opioid claims in 2023 with an opioid prescribing rate of 4.3%.
How many Student in an Organized Health Care Education/Training Program providers are there in the US? ▼
There are 331,761 Student in an Organized Health Care Education/Training Program providers across 55 states in the US. The average Student in an Organized Health Care Education/Training Program provider writes 459 Medicare Part D claims per year.
What drugs does Dien Ton-That, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, Dien Ton-That, D.O.'s most frequently prescribed drugs include Cefpodoxime Proxetil, Azithromycin, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Dien Ton-That, D.O. accept Medicare? ▼
Dien Ton-That, D.O. appears in CMS Medicare data with 373 Part D claims and 136 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Dien Ton-That, D.O.'s credentials? ▼
Dien Ton-That, D.O.'s NPI is 1306074687 with credentials D.O.. 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
Compiled from official public sources by the PlainDoctor editorial team.