HANH-NGUYEN DO MD
NPI 1003907338
Obstetrics & Gynecology in Pleasanton, CA
About Hanh-nguyen Do Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HANH-NGUYEN DO MD (NPI 1003907338) is an individual obstetrics & gynecology provider in Pleasanton, California, licensed in California (A65840) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS, maintains a secondary practice location in Fremont, and is a graduate of University Of California, Geffen School Of Medicine (1996).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
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
Hanh-nguyen Do Md 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.
Medicare Billing Reassignments
5Medicare enrollment records show Hanh-nguyen Do reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fremont, CA 94538
- Reassigned Medicare billing, California enrollment
- 121 clinicians in this Medicare group
Newark, CA 94560
- Reassigned Medicare billing, California enrollment
- 435 clinicians in this Medicare group
Orinda, CA 94563
- Reassigned Medicare billing, California enrollment
- 4,479 clinicians in this Medicare group
Manteca, CA 95336
- Reassigned Medicare billing, California enrollment
- 488 clinicians in this Medicare group
Greenville, SC 29607
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Obhg California PC
- 711 clinicians in this Medicare group
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 94588 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PLEASANTON, CA 94588
PLEASANTON, CA 94588
PLEASANTON, CA 94588
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 Hanh-nguyen Do's NPI number?
The NPI number for Hanh-nguyen Do is 1003907338. It was assigned to this individual provider in the NPPES registry on September 28, 2006.
Where is Hanh-nguyen Do located?
Hanh-nguyen Do practices at 5725 W Las Positas Blvd, Pleasanton, CA 94588. The listed phone number is (258) 479-3000.
What is Hanh-nguyen Do's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Hanh-nguyen Do enrolled in Medicare?
Yes. Hanh-nguyen Do 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 organizations bill Medicare for Hanh-nguyen Do's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Hanh-nguyen Do reassigns Medicare benefits to 5 organizations: Washington Township Medical Foundation (Fremont, CA), University Healthcare Alliance (Newark, CA), Sutter Bay Medical Foundation (Orinda, CA), First Choice Physician Partners (Manteca, CA) and Obhg California, P.C. (Greenville, SC). Each 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 Hanh-nguyen Do'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 Hanh-nguyen Do was last updated on September 6, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Hanh-Nguyen Do, MD · NPI 1003907338
Obstetrics & Gynecology physician in Pleasanton, California. Individual provider, active in the CMS NPPES registry since September 28, 2006.
## Identity
- **NPI:** 1003907338 (Entity type: Individual)
- **Enumerated:** September 28, 2006
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** A65840 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 5725 W LAS POSITAS BLVD, Pleasanton, CA 94588-4054
- **Phone:** (258) 479-3000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Washington Township Medical Foundation (NPI 1346557014, Fremont, CA); University Healthcare Alliance (NPI 1760531198, Newark, CA); Sutter Bay Medical Foundation (NPI 1366898538, Orinda, CA); First Choice Physician Partners (NPI 1760724637, Manteca, CA); Obhg California, P.C. (NPI 1215258892, Greenville, SC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Geffen School Of Medicine, class of 1996
## Record status
- **NPPES last updated:** September 6, 2024
- **Other identifiers:** Medicaid 00A658400 (CA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1003907338) · Data from the CMS NPPES public registry.