TIFFANY HILLMEN LAI FNP
NPI 1295000578
Nurse Practitioner - Family in Walnut Creek, CA
About Tiffany Hillmen Lai Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TIFFANY HILLMEN LAI FNP (NPI 1295000578) is an individual family provider in Walnut Creek, California, licensed in California (21668) and active in the NPI registry since March 2012. She is enrolled in Medicare PECOS and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses
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
Tiffany Hillmen Lai Fnp 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 Reassignment
Medicare enrollment records show Tiffany Lai reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Francisco, CA 94111
- Reassigned Medicare billing, California enrollment
- 291 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.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94598 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 14
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Tiffany Lai's NPI number?
The NPI number for Tiffany Lai is 1295000578. It was assigned to this individual provider in the NPPES registry on March 20, 2012.
Where is Tiffany Lai located?
Tiffany Lai practices at 2337 Oak Grove Rd, Walnut Creek, CA 94598. The listed phone number is (888) 663-6331.
What is Tiffany Lai's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Tiffany Lai enrolled in Medicare?
Yes. Tiffany Lai 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 Tiffany Lai's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tiffany Lai reassigns Medicare benefits to One Medical Group, Inc. (San Francisco, 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 Tiffany Lai'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 Tiffany Lai was last updated on March 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months 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.
# Tiffany Hillmen Lai, FNP · NPI 1295000578
Family physician in Walnut Creek, California. Individual provider, active in the CMS NPPES registry since March 20, 2012.
## Identity
- **NPI:** 1295000578 (Entity type: Individual)
- **Enumerated:** March 20, 2012
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 21668 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2337 OAK GROVE RD, Walnut Creek, CA 94598-3506
- **Phone:** (888) 663-6331 · **Fax:** (415) 252-7176
## 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:** One Medical Group, Inc. (NPI 1467781641, San Francisco, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** March 17, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1295000578) · Data from the CMS NPPES public registry.