NPI registry status
Active
2026 NPPES data Optometrist NPI 1881753598 OD
Verify on CMS → William Tse, OD
Optometrist in Anaheim, 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 60,484 in Optometrist, 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
39
Medicare Part D claims · 19 beneficiaries · Optometrist avg: 257
Generic prescribing
51%
generic claims · 49% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
William Tse, OD filed 39 Medicare Part D claims in 2023 as an Optometrist in Anaheim, California, prescribing 51% generic.
- 39
- Part D claims, 2023
- 51%
- generic prescribing
- ≥0th
- 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.
CMS NPPES provider registry desk
NPI 1881753598 · Optometrist
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-TRACE · BOOK-MID · PHOTO-ENUM
- NPI-10 1881753598
- ENUM-LEGACY 2006
- TAX-MEGA 60K Optometrist
- RX-TRACE 39
- BOOK-MID 8,067 in California
- PHOTO-ENUM Frank Morreale · 2006
William Tse, OD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
39 ≥ 0th percentile 0% 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
What does the federal data show about William Tse, OD?
Quality data not reportedPrimary specialty
Optometrist
Medicare Part D claims
39 85% vs specialty avg
Specialty distribution in California
How Optometrist 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 Optometrist. 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).
Practice Address
Provider Details
| NPI | 1881753598 |
|---|---|
| Specialty | Optometrist |
| Credentials | OD |
| Gender | Male |
| NPI Issued | 12/08/2006 |
Hospital and facility affiliations
Facilities where William Tse, OD 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
La Palma, 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 William Tse, OD. To verify William Tse, OD'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 · Above average
William Tse, OD - brand share 49.0%
Optometrist average
49% brand-name claims vs 51% generic, on 39 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.
39
Total Claims
$4K
Total Drug Cost
19
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 54
- Total Day Supply
- 1,415
- Brand vs Generic
- 49% brand / 51% generic
- Brand Drug Cost
- $3K
- Generic Drug Cost
- $388
Patient Demographics
- Average Patient Age
- 71.1 years
- Avg HCC Risk Score
- 0.86
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Cyclosporine | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Optometrist Overview
How William Tse, OD fits within the Optometrist landscape nationally.
60,484
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider
William Tse, OD's 39 claims are below the specialty average of 257.
Nationwide Optometrist peers with similar MIPS or enrollment year
Two federal-record peer sets for Tse, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Optometrist Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Tse.
One of 8,067 Optometrist providers enrolled in California, 5 are shown here.
Dr. Douglas Aaseby
O.D.
El Dorado Hills, CA
Dr. Saloumeh Abadi
OD
Santa Monica, CA
Davoud Abbasi
Fillmore, CA
Dr. Christopher Abbott
O.D.
Santee, CA
Dr. Sara Abboud
OD
Albany, CA
Compare Optometrist nationally: see state-by-state distribution →
Frequently Asked Questions
What is William Tse, OD's specialty? ▼
William Tse, OD specializes in Optometrist and practices in Anaheim, California. Credentials: OD.
How much does William Tse, OD prescribe under Medicare Part D? ▼
In 2023, William Tse, OD wrote 39 Medicare Part D claims totaling $4K in drug costs for 19 beneficiaries.
Where is William Tse, OD located? ▼
William Tse, OD is located at 441 N LAKEVIEW AVE, Anaheim, CA, 92807. Phone: (888) 988-2800.
What is William Tse, OD's NPI number? ▼
William Tse, OD's National Provider Identifier (NPI) is 1881753598, issued on 12/08/2006.
Does William Tse, OD prescribe more brand-name or generic drugs? ▼
William Tse, OD's prescribing is 49% brand-name and 51% generic drugs by claim count, with $3K in brand drug costs.
How many Optometrist providers are there in the US? ▼
There are 60,484 Optometrist providers across 56 states in the US. The average Optometrist provider writes 257 Medicare Part D claims per year.
What drugs does William Tse, OD prescribe most often? ▼
Based on 2023 Medicare Part D data, William Tse, OD's most frequently prescribed drugs include Cyclosporine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Tse, OD accept Medicare? ▼
William Tse, OD appears in CMS Medicare data with 39 Part D claims and 19 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Tse, OD's credentials? ▼
William Tse, OD's NPI is 1881753598 with credentials OD. 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.