Chien Shien Yang, MD
NPI 1780025692 · Psychiatry Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Provider details
- NPI number
- 1780025692
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A146578 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Divalproex Sodiumbrand: Divalproex Sodium Er | 138 | 11 |
| Risperidone | 123 | — |
| Benztropine Mesylate | 109 | 13 |
| Sertraline Hcl | 106 | 15 |
| Olanzapine | 101 | 14 |
| Trazodone Hcl | 100 | 16 |
| Haloperidol | 89 | — |
| Quetiapine Fumarate |
Practice location
Mailing address
Additional practice locations (1)
- 3880 S Bascom Ave Ste 216San Jose, CA 95124-2675Phone: (415) 655-0952
Registry dates
- Enumerated
- 2013-07-09
- Last updated
- 2025-12-19
- Certified
- 2025-12-19
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.