TAMMY S. HWANG NP
NPI 1639681513
Nurse Practitioner - Family in San Jose, CA
About Tammy S. Hwang Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TAMMY S. HWANG NP (NPI 1639681513) is an individual family provider in San Jose, California, licensed in California (95007792) and active in the NPI registry since October 2017. She is enrolled in Medicare PECOS, maintains 4 additional practice locations, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 4
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
Tammy S. Hwang Np 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
2Medicare enrollment records show Tammy Hwang reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Jose, CA 95125
- Reassigned Medicare billing, California enrollment
- 66 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 95124 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims
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 11
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN JOSE, CA 95124
SAN JOSE, CA 95124
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 Tammy Hwang's NPI number?
The NPI number for Tammy Hwang is 1639681513. It was assigned to this individual provider in the NPPES registry on October 31, 2017.
Where is Tammy Hwang located?
Tammy Hwang practices at 2506 Samaritan Ct, San Jose, CA 95124. The listed phone number is (408) 523-3870.
What is Tammy Hwang's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Tammy Hwang enrolled in Medicare?
Yes. Tammy Hwang 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 Tammy Hwang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tammy Hwang reassigns Medicare benefits to 2 organizations: Indian Health Center Of Santa Clara Valley (San Jose, 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 Tammy Hwang'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 Tammy Hwang was last updated on June 5, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Tammy S. Hwang, NP · NPI 1639681513
Family physician in San Jose, California. Individual provider, active in the CMS NPPES registry since October 31, 2017.
## Identity
- **NPI:** 1639681513 (Entity type: Individual)
- **Enumerated:** October 31, 2017
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 95007792 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2506 SAMARITAN CT, San Jose, CA 95124-4001
- **Phone:** (408) 523-3870
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Indian Health Center Of Santa Clara Valley (NPI 1164643862, San Jose, CA); Sutter Bay Medical Foundation (NPI 1013950807, Palo Alto, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** June 5, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1639681513) · Data from the CMS NPPES public registry.