WOON TECK YAP MD
NPI 1699166702
Internal Medicine in San Francisco, CA
About Woon Teck Yap Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WOON TECK YAP MD (NPI 1699166702) is an individual internal medicine provider in San Francisco, California, licensed in California (A152654) and active in the NPI registry since February 2015. He is enrolled in Medicare PECOS, is affiliated with St James Mercy Hospital, and maintains 8 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Secondary Practice Locations 8
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
Woon Teck Yap 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
6Medicare enrollment records show Woon Teck Yap reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94116
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Davis, CA 95616
- Reassigned Medicare billing, California enrollment
- 2,570 clinicians in this Medicare group
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1487772380 (California)
- 360 clinicians in this Medicare group
Rochester, NY 14642
- Reassigned Medicare billing, New York enrollment
- 198 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 4
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.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St James Mercy Hospital
Acute Care Hospitals · Hornell, NYNicholas H Noyes Memorial Hospital
Acute Care Hospitals · Dansville, NYStrong Memorial Hospital
Acute Care Hospitals · Rochester, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94143 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.
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
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 Woon Teck Yap's NPI number?
The NPI number for Woon Teck Yap is 1699166702. It was assigned to this individual provider in the NPPES registry on February 11, 2015. The provider is also known as Jonathan Woon Teck Yap.
Where is Woon Teck Yap located?
Woon Teck Yap practices at 505 Parnassus Ave Fl 3, San Francisco, CA 94143. The listed phone number is (415) 353-1968.
What is Woon Teck Yap's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Woon Teck Yap enrolled in Medicare?
Yes. Woon Teck Yap 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 Woon Teck Yap's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Woon Teck Yap reassigns Medicare benefits to 6 organizations: Ucsf Medical Group Business Services (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Permanente Medical Group Inc (San Francisco, CA), Regents Of The Univ Of Ca (Davis, CA), Regents Of The University Of California (San Diego, CA) and 1 more organization, listed in the Medicare section above. 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 Woon Teck Yap's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Woon Teck Yap affiliated with any hospitals?
According to CMS data, Woon Teck Yap is affiliated with St James Mercy Hospital, Nicholas H Noyes Memorial Hospital and Strong Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Woon Teck Yap was last updated on October 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 days 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.
# Woon Teck Yap, MD · NPI 1699166702
Internal Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since February 11, 2015.
## Identity
- **NPI:** 1699166702 (Entity type: Individual)
- **Enumerated:** February 11, 2015
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A152654 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 505 PARNASSUS AVE FL 3, San Francisco, CA 94143-2204
- **Phone:** (415) 353-1968
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); University Of California San Francisco (NPI 1164512851, San Francisco, CA); Permanente Medical Group Inc (NPI 1841373800, San Francisco, CA); Regents Of The Univ Of Ca (NPI 1053304071, Davis, CA); Regents Of The University Of California (NPI 1558463927, San Diego, CA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** October 5, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1699166702) · Data from the CMS NPPES public registry.