Yih Chang, M.D.
NPI 1174506380 · Internal Medicine Physician · Fremont, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Yih Chang, M.D. is a Internal Medicine Physician provider in Fremont, CA (NPI 1174506380).
Provider details
- NPI number
- 1174506380
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- G69040 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2005-11-22
- Last updated
- 2016-04-11
Frequently asked questions
- What is Yih Chang's NPI number?
- Yih Chang's National Provider Identifier (NPI) is 1174506380, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Yih Chang's specialty?
- Yih Chang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Yih Chang located?
- Yih Chang's practice location on file with NPPES is 2147 Mowry Ave, Fremont, CA 94538-1724.
- What is Yih Chang's phone number?
- The practice phone number listed in the NPPES registry for Yih Chang is (510) 648-2087.
- Does Yih Chang accept Medicare?
- Yih Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Yih Chang's NPI active?
- Yes — Yih Chang's NPI (1174506380) is active in the NPPES registry as of the last update on 2016-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.