Ai Chien, M.D.
NPI 1316301138 · Occupational Medicine Physician · San Francisco, CA
Ai Chien, M.D. is a Occupational Medicine Physician provider in San Francisco, CA (NPI 1316301138).
Provider details
- NPI number
- 1316301138
- Entity type
- Individual
- Primary specialty
- Occupational Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A150820 (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
10 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.
Practice location
Mailing address
Additional practice locations (1)
- 1411 E 31st StOakland, CA 94602-1018Phone: (510) 437-4800
Registry dates
- Enumerated
- 2016-04-07
- Last updated
- 2021-04-08
- Certified
- 2021-03-18
Frequently asked questions
- What is Ai Chien's NPI number?
- Ai Chien's National Provider Identifier (NPI) is 1316301138, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ai Chien's specialty?
- Ai Chien is listed in the NPPES registry with a primary specialty of Occupational Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ai Chien located?
- Ai Chien's practice location on file with NPPES is Castro & Duboce Streets, San Francisco, CA 94114.
- What is Ai Chien's phone number?
- The practice phone number listed in the NPPES registry for Ai Chien is (415) 600-5200.
- Is Ai Chien's NPI active?
- Yes — Ai Chien's NPI (1316301138) is active in the NPPES registry as of the last update on 2021-04-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.