NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1477767648 MD
Verify on CMS → Anna Kesler-Diaz, MD
Ophthalmology Physician in Santa Cruz, 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 22,082 in Ophthalmology 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
6K
Medicare Part D claims · 875 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
50%
generic claims · 50% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$107.19
1 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
Anna Kesler-Diaz, MD filed 5,522 Medicare Part D claims in 2023 as a Ophthalmology Physician in Santa Cruz, California, prescribing 50% generic.
- 6K
- Part D claims, 2023
- 50%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Anna Kesler-Diaz, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
5,522 Top 5% higher than 95% 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 certification likely (heuristic, not verified)
Anna Kesler-Diaz, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Anna Kesler-Diaz, MD?
Quality data not reportedPrimary specialty
Ophthalmology Physician
Medicare Part D claims
5,522 289% vs specialty avg
Specialty distribution in California
How Ophthalmology 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 Ophthalmology 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).
Anna Kesler-Diaz, MD appears in the CMS NPPES registry as an Ophthalmology Physician provider holding MD credentials at 2025 SOQUEL AVE, Santa Cruz, CA, 95062, with a listed phone of (831) 458-5640. NPI 1477767648 was issued on 05/09/2007.
Medicare Part D records for calendar year 2023 show 5,522 prescription claims written by this provider, covering 875 Medicare beneficiaries and totaling roughly $1.1 million in drug spend, split 50% brand-name and 50% generic by claim count.
Ophthalmology Physician is a mid-sized specialty nationwide, with 22,082 enrolled providers across 56 states and an average of 1,420 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 | 1477767648 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 05/09/2007 |
Hospital and facility affiliations
Facilities where Anna Kesler-Diaz, MD 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.
Sutter Bay Medical Foundation
Palo Alto, 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).
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 Anna Kesler-Diaz, MD. Source: openpaymentsdata.cms.gov.
Total received
$107
Largest payer
ABBVIE 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 Anna Kesler-Diaz, MD. To verify Anna Kesler-Diaz, 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 · Brand-heavy
Anna Kesler-Diaz, MD - brand share 50.0%
Ophthalmology Physician average
50% brand-name claims vs 50% generic, on 5,522 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.
5,522
Total Claims
$1.1M
Total Drug Cost
875
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 8,762
- Total Day Supply
- 237,701
- Brand vs Generic
- 50% brand / 50% generic
- Brand Drug Cost
- $910K
- Generic Drug Cost
- $186K
Patient Demographics
- Average Patient Age
- 77.1 years
- Avg HCC Risk Score
- 1.05
- Gender Split
- 63% female / 37% male
- Age Distribution
- <65: 17, 65-74: 314, 75-84: 423, 85+: 121
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Anna Kesler-Diaz, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Latanoprost
Latanoprost
1,139 claims
- Prednisolone Acetate
Prednisolone Acetate
598 claims
- Moxifloxacin 410
Moxifloxacin
410 claims
- Dorzolamide-Timolol 361
Dorzolamide-Timolol
361 claims
- Ketorolac Trometha… 361
Ketorolac Tromethamine
361 claims
- Timolol Maleate 294
Timolol Maleate
294 claims
- Brimonidine Tartrate 287
Brimonidine Tartrate
287 claims
- Rhopressa 251
Rhopressa
251 claims
| Drug | Claims |
|---|---|
| Latanoprost | 1,139 |
| Prednisolone Acetate | 598 |
| Moxifloxacin Moxifloxacin Hcl | 410 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 361 |
| Ketorolac Tromethamine | 361 |
| Timolol Maleate | 294 |
| Brimonidine Tartrate | 287 |
| Rhopressa Netarsudil Mesylate | 251 |
| Lumigan Bimatoprost | 241 |
| Restasis Cyclosporine | 157 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How Anna Kesler-Diaz, MD fits within the Ophthalmology Physician landscape nationally.
22,082
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider
Anna Kesler-Diaz, MD's 5,522 claims are above the specialty average of 1,420.
Nearby Ophthalmology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Kesler-Diaz.
Dr. Sam Abbassi
MD, MS
West Hills, CA
Dr. Richard Abbott
M.D.
San Francisco, CA
Dr. Nizar Abdelfattah
MD
Pasadena, CA
Dr. Parastou Abedi
MD
Aliso Viejo, CA
Dr. Shahla Abedi
MD
Aliso Viejo, CA
Compare Ophthalmology 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 Ophthalmology 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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Understanding Medicare Claims Data
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Frequently Asked Questions
What is Anna Kesler-Diaz, MD's specialty? ▼
Anna Kesler-Diaz, MD specializes in Ophthalmology Physician and practices in Santa Cruz, California. Credentials: MD.
How much does Anna Kesler-Diaz, MD prescribe under Medicare Part D? ▼
In 2023, Anna Kesler-Diaz, MD wrote 5,522 Medicare Part D claims totaling $1.1M in drug costs for 875 beneficiaries.
Where is Anna Kesler-Diaz, MD located? ▼
Anna Kesler-Diaz, MD is located at 2025 SOQUEL AVE, Santa Cruz, CA, 95062. Phone: (831) 458-5640.
What is Anna Kesler-Diaz, MD's NPI number? ▼
Anna Kesler-Diaz, MD's National Provider Identifier (NPI) is 1477767648, issued on 05/09/2007.
Does Anna Kesler-Diaz, MD prescribe more brand-name or generic drugs? ▼
Anna Kesler-Diaz, MD's prescribing is 50% brand-name and 50% generic drugs by claim count, with $910K in brand drug costs.
How many Ophthalmology Physician providers are there in the US? ▼
There are 22,082 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does Anna Kesler-Diaz, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Anna Kesler-Diaz, MD's most frequently prescribed drugs include Latanoprost, Prednisolone Acetate, Moxifloxacin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Anna Kesler-Diaz, MD accept Medicare? ▼
Anna Kesler-Diaz, MD appears in CMS Medicare data with 5,522 Part D claims and 875 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Anna Kesler-Diaz, MD's credentials? ▼
Anna Kesler-Diaz, MD's NPI is 1477767648 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
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.