Sam Yang, MD
NPI 1811049034 · Ophthalmology Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sam Yang, MD is a Ophthalmology Physician provider in Walnut Creek, CA (NPI 1811049034).
Provider details
- NPI number
- 1811049034
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A75699 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 179 | 81 |
| Timolol Maleate | 91 | 56 |
| Atropine Sulfate | 59 | 50 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 56 | 19 |
| Ofloxacin | 51 | 50 |
| Latanoprost | 38 | 16 |
| Brimonidine Tartrate | 29 | 18 |
| Diclofenac Sodium | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$167 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-17
- Last updated
- 2021-12-13
Frequently asked questions
- What is Sam Yang's NPI number?
- Sam Yang's National Provider Identifier (NPI) is 1811049034, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sam Yang's specialty?
- Sam Yang is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Sam Yang located?
- Sam Yang's practice location on file with NPPES is 320 Lennon Ln, Walnut Creek, CA 94598-2419.
- What is Sam Yang's phone number?
- The practice phone number listed in the NPPES registry for Sam Yang is (925) 906-2000.
- Does Sam Yang accept Medicare?
- Sam Yang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sam Yang's NPI active?
- Yes — Sam Yang's NPI (1811049034) is active in the NPPES registry as of the last update on 2021-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.