Hong-An Jan, M.D.
NPI 1255332979 · Specialist · Garden Grove, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hong-An Jan, M.D. is a Specialist provider in Garden Grove, CA (NPI 1255332979).
Provider details
- NPI number
- 1255332979
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A31743 (CA)
Specialties & taxonomies
Other Service Providers
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
- 2005-08-03
- Last updated
- 2012-10-05
Frequently asked questions
- What is Hong-An Jan's NPI number?
- Hong-An Jan's National Provider Identifier (NPI) is 1255332979, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hong-An Jan's specialty?
- Hong-An Jan is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Hong-An Jan located?
- Hong-An Jan's practice location on file with NPPES is 12555 Garden Grove Blvd, Garden Grove, CA 92843-1902.
- What is Hong-An Jan's phone number?
- The practice phone number listed in the NPPES registry for Hong-An Jan is (714) 538-1288.
- Does Hong-An Jan accept Medicare?
- Hong-An Jan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hong-An Jan's NPI active?
- Yes — Hong-An Jan's NPI (1255332979) is active in the NPPES registry as of the last update on 2012-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.