Alec Chang, D.O.
NPI 1013259415 · Psychiatry Physician · Greenbrae, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alec Chang, D.O. is a Psychiatry Physician provider in Greenbrae, CA (NPI 1013259415).
Provider details
- NPI number
- 1013259415
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
13 yrs in NPPES registry
- Profile completeness38% of score
83% 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)
- 401 W 2nd StSuite 216Reno, NV 89503-5345Phone: (775) 682-8469
Registry dates
- Enumerated
- 2013-03-23
- Last updated
- 2022-07-21
Frequently asked questions
- What is Alec Chang's NPI number?
- Alec Chang's National Provider Identifier (NPI) is 1013259415, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alec Chang's specialty?
- Alec Chang is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Alec Chang located?
- Alec Chang's practice location on file with NPPES is 250 Bon Air Rd, Greenbrae, CA 94904-1702.
- What is Alec Chang's phone number?
- The practice phone number listed in the NPPES registry for Alec Chang is (415) 473-6835.
- Does Alec Chang accept Medicare?
- Alec Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alec Chang's NPI active?
- Yes — Alec Chang's NPI (1013259415) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.