NANCY WEN-HSING TIBBS MD
NPI 1386736015
Internal Medicine in Stanford, CA
About Nancy Wen-hsing Tibbs Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NANCY WEN-HSING TIBBS MD (NPI 1386736015) is an individual internal medicine provider in Stanford, California, licensed in California (A63344) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS and is a graduate of Harvard Medical School (1996).
NPPES Registry Identity
Specialties & Licenses
Other Names 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
Nancy Wen-hsing Tibbs 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
3Medicare enrollment records show Nancy Tibbs reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stanford, CA 94305
- Reassigned Medicare billing, California enrollment
- 4,258 clinicians in this Medicare group
Palo Alto, CA 94304
- Reassigned Medicare billing, California enrollment
- 3,617 clinicians in this Medicare group
Palo Alto, CA 94301
- Reassigned Medicare billing, California enrollment
- 4,479 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 2
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 94305 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
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 Nancy Tibbs's NPI number?
The NPI number for Nancy Tibbs is 1386736015. It was assigned to this individual provider in the NPPES registry on September 29, 2006. The provider is also known as Nancy Tseng MD.
Where is Nancy Tibbs located?
Nancy Tibbs practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-4000.
What is Nancy Tibbs's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Nancy Tibbs enrolled in Medicare?
Yes. Nancy Tibbs 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 Nancy Tibbs's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nancy Tibbs reassigns Medicare benefits to 3 organizations: Stanford Health Care (Stanford, CA), Lpch Medical Group Div Of Lucile (Palo Alto, CA) and Sutter Bay Medical Foundation (Palo Alto, CA). 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 Nancy Tibbs'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 Nancy Tibbs was last updated on April 23, 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.
# Nancy Wen-Hsing Tibbs, MD · NPI 1386736015
Internal Medicine physician in Stanford, California. Individual provider, active in the CMS NPPES registry since September 29, 2006.
## Identity
- **NPI:** 1386736015 (Entity type: Individual)
- **Enumerated:** September 29, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A63344 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 PASTEUR DR, Stanford, CA 94305-2200
- **Phone:** (650) 723-4000
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Stanford Health Care (NPI 1437292927, Stanford, CA); Lpch Medical Group Div Of Lucile (NPI 1417907940, Palo Alto, CA); Sutter Bay Medical Foundation (NPI 1013950807, Palo Alto, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 1996
## Record status
- **NPPES last updated:** April 23, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1386736015) · Data from the CMS NPPES public registry.