NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1699932962 MD
Verify on CMS → Mehrdad Ayati, MD
Family Medicine Physician in Los Altos, 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
3K
Medicare Part D claims · 103 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
86%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$18.82
1 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Mehrdad Ayati, MD filed 2,906 Medicare Part D claims in 2023 as a Family Medicine Physician in Los Altos, California, prescribing 86% generic.
- 3K
- Part D claims, 2023
- 86%
- generic prescribing
- $18.82
- industry payments (Sunshine Act)
- ≥88th
- pct by Part D claim volume (lower-bound band)
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.
Mehrdad Ayati, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,906 ≥ 88th percentile 88% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Mehrdad Ayati, MD 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 Mehrdad Ayati, MD?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
2,906 15% 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).
Mehrdad Ayati, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 851 FREMONT AVE STE 103, Los Altos, CA, 94024, with a listed phone of (650) 808-0180. NPI 1699932962 was issued on 05/22/2008.
Medicare Part D records for calendar year 2023 show 2,906 prescription claims written by this provider, covering 103 Medicare beneficiaries and totaling roughly $277K in drug spend, split 13% brand-name and 86% generic by claim count, with an opioid prescribing rate of 4.2%.
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 | 1699932962 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 05/22/2008 |
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 Mehrdad Ayati, MD. Source: openpaymentsdata.cms.gov.
Total received
$19
Largest payer
Eisai 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 Mehrdad Ayati, MD. To verify Mehrdad Ayati, MD'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
Mehrdad Ayati, MD - brand share 13.0%
Family Medicine Physician average
13% brand-name claims vs 86% generic, on 2,906 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.
2,906
Total Claims
$277K
Total Drug Cost
103
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,900
- Total Day Supply
- 106,412
- Brand vs Generic
- 13% brand / 86% generic
- Brand Drug Cost
- $171K
- Generic Drug Cost
- $105K
- Opioid Claims
- 121 (4.2% rate)
- Antibiotic Claims
- 112
Patient Demographics
- Average Patient Age
- 83.1 years
- Avg HCC Risk Score
- 1.50
- Gender Split
- 67% female / 33% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mehrdad Ayati, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Escitalopram Oxalate
Escitalopram Oxalate
153 claims
- Gabapentin
Gabapentin
125 claims
- Trazodone Hcl
Trazodone Hcl
108 claims
- Quetiapine Fumarate
Quetiapine Fumarate
84 claims
- Citalopram Hbr
Citalopram Hbr
78 claims
- Donepezil Hcl
Donepezil Hcl
77 claims
- Memantine Hcl
Memantine Hcl
76 claims
- Levothyroxine Sodium
Levothyroxine Sodium
73 claims
| Drug | Claims |
|---|---|
| Escitalopram Oxalate | 153 |
| Gabapentin | 125 |
| Trazodone Hcl | 108 |
| Quetiapine Fumarate | 84 |
| Citalopram Hbr Citalopram Hydrobromide | 78 |
| Donepezil Hcl | 77 |
| Memantine Hcl | 76 |
| Levothyroxine Sodium | 73 |
| Eliquis Apixaban | 71 |
| Pantoprazole Sodium | 70 |
* 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 Mehrdad Ayati, MD 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
Mehrdad Ayati, MD's 2,906 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 Ayati.
One of 15,933 Family Medicine Physician providers enrolled in California, 5 are shown here.
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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How insurance networks affect your costs
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Frequently Asked Questions
What is Mehrdad Ayati, MD's specialty? ▼
Mehrdad Ayati, MD specializes in Family Medicine Physician and practices in Los Altos, California. Credentials: MD.
How much does Mehrdad Ayati, MD prescribe under Medicare Part D? ▼
In 2023, Mehrdad Ayati, MD wrote 2,906 Medicare Part D claims totaling $277K in drug costs for 103 beneficiaries.
Where is Mehrdad Ayati, MD located? ▼
Mehrdad Ayati, MD is located at 851 FREMONT AVE STE 103, Los Altos, CA, 94024. Phone: (650) 808-0180.
What is Mehrdad Ayati, MD's NPI number? ▼
Mehrdad Ayati, MD's National Provider Identifier (NPI) is 1699932962, issued on 05/22/2008.
Does Mehrdad Ayati, MD prescribe more brand-name or generic drugs? ▼
Mehrdad Ayati, MD's prescribing is 13% brand-name and 86% generic drugs by claim count, with $171K in brand drug costs.
Does Mehrdad Ayati, MD prescribe opioids? ▼
Yes, Mehrdad Ayati, MD had 121 opioid claims in 2023 with an opioid prescribing rate of 4.2%.
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 Mehrdad Ayati, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mehrdad Ayati, MD's most frequently prescribed drugs include Escitalopram Oxalate, Gabapentin, Trazodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mehrdad Ayati, MD accept Medicare? ▼
Mehrdad Ayati, MD appears in CMS Medicare data with 2,906 Part D claims and 103 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mehrdad Ayati, MD's credentials? ▼
Mehrdad Ayati, MD's NPI is 1699932962 with credentials MD. 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.