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DR. WILLIAM I HAN M.D.
NPI 1043300114
Obstetrics & Gynecology - Urogynecology and Reconstructive Pelvic Surgery in Fountain Valley, CA

Active since October 12, 2006PECOS EnrolledAccepts Medicare Assignment
17150 EUCLID ST STE 220, FOUNTAIN VALLEY, CA 92708(714) 444-3030(949) 419-2515 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 21, 2022, Mar 17, 2018, Aug 8, 2017 (3 updates tracked since 2017).

About Dr. William I Han M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM I HAN M.D. (NPI 1043300114) is an individual urogynecology and reconstructive pelvic surgery provider in Fountain Valley, California, licensed in California (A38218) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Fountain Valley, and is a graduate of Other (1975).

NPPES Registry Identity

NPI1043300114
Entity TypeIndividualMale
Primary Taxonomy207VF0040X
Provider Legal NameDR. WILLIAM I HANCredential: M.D.
Location Address17150 EUCLID ST STE 220Fountain Valley, CA 92708-4092
Mailing Address17150 Euclid St Ste 220Fountain Valley, CA 92708-4092 · (714) 444-3030 · Fax (949) 419-2515
Phone(714) 444-3030
Fax(949) 419-2515
Sole ProprietorYes
Medical School CMSOtherGraduated 1975
Enumeration DateOctober 12, 2006
Last NPPES UpdateJuly 21, 20223 updates tracked since enumeration
✔ NPI 1043300114 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · Urogynecology and Reconstructive Pelvic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207VF0040X
License✔ Licensed in CA · A38218
Definition
A subspecialist in Urogynecology and Reconstructive Pelvic Surgery is a physician in Urology or Obstetrics and Gynecology who, by virtue of education and training, is prepared to provide consultation and comprehensive management of women with complex benign pelvic conditions, lower urinary tract disorders, and pelvic floor dysfunction. Comprehensive management includes those diagnostic and therapeutic procedures necessary for the total care of the patient with these conditions and complications resulting from them.
17150 EUCLID ST STE 220, Fountain Valley, CA 92708
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Secondary Practice Location 1

Location 111160 Warner Ave Ste 303Fountain Valley, CA 92708-4055 · Phone (714) 444-3030

Other Identifiers 1

Medicaid00A382180CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. William I Han M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5890864904
PECOS Enrollment IDI20080515000307
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show William Han reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

William I. Han, M.D. Inc
Same address
Clinic/Center
17150 EUCLID ST, SUITE 220
Fountain Valley, CA 92708
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: William I Han MD Inc
NPI 1831381664 (714) 444-3030

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92708 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DARYOOSH SAMIMI MD INC
Obstetrics & Gynecology
17150 EUCLID ST STE 220
FOUNTAIN VALLEY, CA 92708
Orange County (714) 546-3898

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Han's NPI number?

The NPI number for William Han is 1043300114. It was assigned to this individual provider in the NPPES registry on October 12, 2006.

Where is William Han located?

William Han practices at 17150 Euclid St Ste 220, Fountain Valley, CA 92708. The listed phone number is (714) 444-3030.

What is William Han's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Urogynecology and Reconstructive Pelvic Surgery, with taxonomy code 207VF0040X.

Is William Han enrolled in Medicare?

Yes. William Han is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for William Han's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Han reassigns Medicare benefits to William I. Han, M.D. Inc (Fountain Valley, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Han's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Han was last updated on July 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.