William I. Han, M.D. Inc
NPI 1831381664 · Clinic/Center · Fountain Valley, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William I. Han, M.D. Inc is a Clinic/Center organization in Fountain Valley, CA (NPI 1831381664).
Provider details
- NPI number
- 1831381664
- Entity type
- Organization
- Primary specialty
- Clinic/CenterAmbulatory Health Care Facilities
- Organization subpart
- No
- Authorized official
- William Han, President(714) 444-3030
- License
- A38218 (CA)
Specialties & taxonomies
Ambulatory Health Care Facilities
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
- 2007-08-15
- Last updated
- 2012-04-11
Frequently asked questions
- What is William I. Han, M.D. Inc's NPI number?
- William I. Han, M.D. Inc's National Provider Identifier (NPI) is 1831381664, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is William I. Han, M.D. Inc?
- William I. Han, M.D. Inc is classified in the NPPES registry as Clinic/Center (Ambulatory Health Care Facilities).
- Where is William I. Han, M.D. Inc located?
- William I. Han, M.D. Inc's practice location on file with NPPES is 17150 Euclid St, Fountain Valley, CA 92708-4092.
- What is William I. Han, M.D. Inc's phone number?
- The practice phone number listed in the NPPES registry for William I. Han, M.D. Inc is (714) 444-3030.
- Does William I. Han, M.D. Inc accept Medicare?
- William I. Han, M.D. Inc is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for William I. Han, M.D. Inc?
- The authorized official listed on William I. Han, M.D. Inc's NPPES record is William Han, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is William I. Han, M.D. Inc's NPI active?
- Yes — William I. Han, M.D. Inc's NPI (1831381664) is active in the NPPES registry as of the last update on 2012-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.