NPI registry status
Active
2026 NPPES data MOHS-Micrographic Surgery Physician NPI 1053468934 M.D.
Verify on CMS → Frank Zhan, M.D.
MOHS-Micrographic Surgery Physician in Mission Viejo, 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 1,107 in MOHS-Micrographic Surgery 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
3K
Medicare Part D claims · 887 beneficiaries · MOHS-Micrographic Surgery Physician avg: 607
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$328.93
16 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Frank Zhan, M.D. filed 2,914 Medicare Part D claims in 2023 as a MOHS-Micrographic Surgery Physician in Mission Viejo, California, prescribing 95% generic.
- 3K
- Part D claims, 2023
- 95%
- generic prescribing
- $328.93
- 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.
Frank Zhan, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,914 Top 12% higher than 88% 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)
Frank Zhan, 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 Frank Zhan, M.D.?
Quality data not reportedPrimary specialty
MOHS-Micrographic Surgery Physician
Medicare Part D claims
2,914 380% vs specialty avg
Specialty distribution in California
How MOHS-Micrographic Surgery 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 MOHS-Micrographic Surgery 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).
Frank Zhan, M.D. appears in the CMS NPPES registry as a MOHS-Micrographic Surgery Physician provider holding M.D. credentials at 26691 PLAZA STE 230, Mission Viejo, CA, 92691, with a listed phone of (949) 364-2904. NPI 1053468934 was issued on 01/04/2007.
Medicare Part D records for calendar year 2023 show 2,914 prescription claims written by this provider, covering 887 Medicare beneficiaries and totaling roughly $199K in drug spend, split 5% brand-name and 95% generic by claim count, with an opioid prescribing rate of 2.1%.
MOHS-Micrographic Surgery Physician is a narrow specialty nationwide, with 1,107 enrolled providers across 52 states and an average of 607 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 | 1053468934 |
|---|---|
| Specialty | MOHS-Micrographic Surgery Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 01/04/2007 |
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 Frank Zhan, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$329
Largest payer
Regeneron Healthcare Solutions, 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 Frank Zhan, M.D.. To verify Frank Zhan, 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 · Generic-heavy
Frank Zhan, M.D. - brand share 5.0%
MOHS-Micrographic Surgery Physician average
5% brand-name claims vs 95% generic, on 2,914 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.
2,914
Total Claims
$199K
Total Drug Cost
887
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,339
- Total Day Supply
- 90,430
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $99K
- Generic Drug Cost
- $100K
- Opioid Claims
- 61 (2.1% rate)
- Antibiotic Claims
- 125
Patient Demographics
- Average Patient Age
- 76.2 years
- Avg HCC Risk Score
- 1.71
- Gender Split
- 45% female / 55% male
- Age Distribution
- <65: 32, 65-74: 356, 75-84: 351, 85+: 148
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Frank Zhan, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Ketoconazole
Ketoconazole
623 claims
- Mupirocin
Mupirocin
391 claims
- Metronidazole 247
Metronidazole
247 claims
- Fluorouracil 186
Fluorouracil
186 claims
- Triamcinolone Acet… 177
Triamcinolone Acetonide
177 claims
- Fluocinonide 173
Fluocinonide
173 claims
- Ciclopirox 142
Ciclopirox
142 claims
- Clobetasol Propion… 131
Clobetasol Propionate
131 claims
| Drug | Claims |
|---|---|
| Ketoconazole | 623 |
| Mupirocin | 391 |
| Metronidazole | 247 |
| Fluorouracil | 186 |
| Triamcinolone Acetonide | 177 |
| Fluocinonide | 173 |
| Ciclopirox | 142 |
| Clobetasol Propionate | 131 |
| Clindamycin Phosphate | 119 |
| Cephalexin | 78 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More MOHS-Micrographic Surgery Physician in CA →
All providers in California →
Compare specialties →
MOHS-Micrographic Surgery Physician Overview
How Frank Zhan, M.D. fits within the MOHS-Micrographic Surgery Physician landscape nationally.
1,107
MOHS-Micrographic Surgery Physician Providers in US
52
States with MOHS-Micrographic Surgery Physician
607
Avg Claims per Provider
Frank Zhan, M.D.'s 2,914 claims are above the specialty average of 607.
Nearby MOHS-Micrographic Surgery Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Zhan.
Dr. Sam Abaza
M.D.
Diamond Bar, CA
Dr. Payam Abrishami
MD
Agoura Hills, CA
Dr. Vince Afsahi
M.D.
Tustin, CA
Dr. Kristen Aguirre
MD
Oceanside, CA
Dr. Ji Won Ahn
MD
Walnut Creek, CA
Compare MOHS-Micrographic Surgery 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 MOHS-Micrographic Surgery 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 Frank Zhan, M.D.'s specialty? ▼
Frank Zhan, M.D. specializes in MOHS-Micrographic Surgery Physician and practices in Mission Viejo, California. Credentials: M.D..
How much does Frank Zhan, M.D. prescribe under Medicare Part D? ▼
In 2023, Frank Zhan, M.D. wrote 2,914 Medicare Part D claims totaling $199K in drug costs for 887 beneficiaries.
Where is Frank Zhan, M.D. located? ▼
Frank Zhan, M.D. is located at 26691 PLAZA STE 230, Mission Viejo, CA, 92691. Phone: (949) 364-2904.
What is Frank Zhan, M.D.'s NPI number? ▼
Frank Zhan, M.D.'s National Provider Identifier (NPI) is 1053468934, issued on 01/04/2007.
Does Frank Zhan, M.D. prescribe more brand-name or generic drugs? ▼
Frank Zhan, M.D.'s prescribing is 5% brand-name and 95% generic drugs by claim count, with $99K in brand drug costs.
Does Frank Zhan, M.D. prescribe opioids? ▼
Yes, Frank Zhan, M.D. had 61 opioid claims in 2023 with an opioid prescribing rate of 2.1%.
How many MOHS-Micrographic Surgery Physician providers are there in the US? ▼
There are 1,107 MOHS-Micrographic Surgery Physician providers across 52 states in the US. The average MOHS-Micrographic Surgery Physician provider writes 607 Medicare Part D claims per year.
What drugs does Frank Zhan, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Frank Zhan, M.D.'s most frequently prescribed drugs include Ketoconazole, Mupirocin, Metronidazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Frank Zhan, M.D. accept Medicare? ▼
Frank Zhan, M.D. appears in CMS Medicare data with 2,914 Part D claims and 887 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Frank Zhan, M.D.'s credentials? ▼
Frank Zhan, M.D.'s NPI is 1053468934 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
Compiled from official public sources by the PlainDoctor editorial team.
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.