NPI registry status
Active
2026 NPPES data Medical Physician Assistant NPI 1851544712 PA-C
Verify on CMS → Timothy Sayles, PA-C
Medical Physician Assistant in San Ramon, 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 40,580 in Medical Physician Assistant, 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
1K
Medicare Part D claims · 244 beneficiaries · Medical Physician Assistant avg: 1K
Industry payments
$32.25
1 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Timothy Sayles, PA-C filed 1,317 Medicare Part D claims in 2023 as a Medical Physician Assistant in San Ramon, California.
- 1K
- Part D claims, 2023
- $32.25
- 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.
Timothy Sayles, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,317 Top 21% higher than 79% 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 Timothy Sayles, PA-C?
Quality data not reportedPrimary specialty
Medical Physician Assistant
Medicare Part D claims
1,317 22% vs specialty avg
Specialty distribution in California
How Medical Physician Assistant 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 Medical Physician Assistant. 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).
Timothy Sayles, PA-C appears in the CMS NPPES registry as a Medical Physician Assistant provider holding PA-C credentials at 12677 ALCOSTA BLVD STE 175, San Ramon, CA, 94583, with a listed phone of (925) 856-5668. NPI 1851544712 was issued on 10/23/2008.
Medicare Part D records for calendar year 2023 show 1,317 prescription claims written by this provider, covering 244 Medicare beneficiaries and totaling roughly $87K in drug spend, with an opioid prescribing rate of 0.9%.
Medical Physician Assistant is a mid-sized specialty nationwide, with 40,580 enrolled providers across 55 states and an average of 1,077 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 | 1851544712 |
|---|---|
| Specialty | Medical Physician Assistant |
| Credentials | PA-C |
| Gender | Male |
| NPI Issued | 10/23/2008 |
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 Timothy Sayles, PA-C. Source: openpaymentsdata.cms.gov.
Total received
$32
Largest payer
GlaxoSmithKline, LLC.
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 Timothy Sayles, PA-C. To verify Timothy Sayles, PA-C'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.
1,317
Total Claims
$87K
Total Drug Cost
244
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,771
- Total Day Supply
- 79,447
- Generic Drug Cost
- $25K
- Opioid Claims
- 12 (0.9% rate)
- Antibiotic Claims
- 74
Patient Demographics
- Average Patient Age
- 73.8 years
- Avg HCC Risk Score
- 0.91
- Gender Split
- 43% female / 57% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Timothy Sayles, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
92 claims
- Lisinopril
Lisinopril
51 claims
- Escitalopram Oxalate 34
Escitalopram Oxalate
34 claims
- Amlodipine Besylate 32
Amlodipine Besylate
32 claims
- Zolpidem Tartrate 32
Zolpidem Tartrate
32 claims
- Levothyroxine Sodium 31
Levothyroxine Sodium
31 claims
- Azithromycin 30
Azithromycin
30 claims
- Gabapentin 29
Gabapentin
29 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 92 |
| Lisinopril | 51 |
| Escitalopram Oxalate | 34 |
| Amlodipine Besylate | 32 |
| Zolpidem Tartrate | 32 |
| Levothyroxine Sodium | 31 |
| Azithromycin | 30 |
| Gabapentin | 29 |
| Rosuvastatin Calcium | 28 |
| Simvastatin | 26 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Medical Physician Assistant Overview
How Timothy Sayles, PA-C fits within the Medical Physician Assistant landscape nationally.
40,580
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider
Timothy Sayles, PA-C's 1,317 claims are above the specialty average of 1,077.
Nearby Medical Physician Assistant Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Sayles.
Dr. Bridget Abajian
PA-C
Los Angeles, CA
Dr. Crispin Abbott
PHYSICIAN ASSISTANT
Thousand Oaks, CA
Dr. Abdol Hamid Abdali Hajiabadi
P.A.
Santa Ana, CA
Dr. Jilbert Abnoosian
PA
Lynwood, CA
Dr. Sakina Abowath
P.A.
Diamond Bar, CA
Compare Medical Physician Assistant 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 Medical Physician Assistant 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 Timothy Sayles, PA-C's specialty? ▼
Timothy Sayles, PA-C specializes in Medical Physician Assistant and practices in San Ramon, California. Credentials: PA-C.
How much does Timothy Sayles, PA-C prescribe under Medicare Part D? ▼
In 2023, Timothy Sayles, PA-C wrote 1,317 Medicare Part D claims totaling $87K in drug costs for 244 beneficiaries.
Where is Timothy Sayles, PA-C located? ▼
Timothy Sayles, PA-C is located at 12677 ALCOSTA BLVD STE 175, San Ramon, CA, 94583. Phone: (925) 856-5668.
What is Timothy Sayles, PA-C's NPI number? ▼
Timothy Sayles, PA-C's National Provider Identifier (NPI) is 1851544712, issued on 10/23/2008.
Does Timothy Sayles, PA-C prescribe opioids? ▼
Yes, Timothy Sayles, PA-C had 12 opioid claims in 2023 with an opioid prescribing rate of 0.9%.
How many Medical Physician Assistant providers are there in the US? ▼
There are 40,580 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,077 Medicare Part D claims per year.
What drugs does Timothy Sayles, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Timothy Sayles, PA-C's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Escitalopram Oxalate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Timothy Sayles, PA-C accept Medicare? ▼
Timothy Sayles, PA-C appears in CMS Medicare data with 1,317 Part D claims and 244 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Timothy Sayles, PA-C's credentials? ▼
Timothy Sayles, PA-C's NPI is 1851544712 with credentials PA-C. 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.