THERESA WIN
NPI 1538401856
Internal Medicine in San Bernardino, CA
About Theresa Win NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THERESA WIN (NPI 1538401856) is an individual internal medicine provider in San Bernardino, California, licensed in California (A138793) and active in the NPI registry since March 2013. She is enrolled in Medicare PECOS, maintains a secondary practice location in Fontana, and is a graduate of Other (2005).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Secondary Practice Location 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
Theresa Win 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 Theresa Win reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Bernardino, CA 92404
- Reassigned Medicare billing, California enrollment
- 1,216 clinicians in this Medicare group
Fontana, CA 92335
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1952333460 (California)
- 5,228 clinicians in this Medicare group
Norwalk, CA 90650
- Reassigned Medicare billing, California enrollment
- 755 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 92411 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.
Reported Quality Measures
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 BERNARDINO, CA 92411
SAN BERNARDINO, CA 92411
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 Theresa Win's NPI number?
The NPI number for Theresa Win is 1538401856. It was assigned to this individual provider in the NPPES registry on March 25, 2013. The provider is also known as Thae Mar.
Where is Theresa Win located?
Theresa Win practices at 1805 Medical Center Dr, San Bernardino, CA 92411. The listed phone number is (909) 887-6333.
What is Theresa Win's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Theresa Win enrolled in Medicare?
Yes. Theresa Win 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 Theresa Win's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Theresa Win reassigns Medicare benefits to 3 organizations: Inpatient Specialists Of California, PC (San Bernardino, CA), Southern California Permanente Medical Group (Fontana, CA) and Department Of State Hospitals (Norwalk, 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 Theresa Win'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 Theresa Win was last updated on December 23, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Theresa Win · NPI 1538401856
Internal Medicine physician in San Bernardino, California. Individual provider, active in the CMS NPPES registry since March 25, 2013.
## Identity
- **NPI:** 1538401856 (Entity type: Individual)
- **Enumerated:** March 25, 2013
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A138793 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1805 MEDICAL CENTER DR, San Bernardino, CA 92411
- **Phone:** (909) 887-6333
## 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): Inpatient Specialists Of California, PC (NPI 1952792475, San Bernardino, CA); Southern California Permanente Medical Group (NPI 1689606196, Fontana, CA); Department Of State Hospitals (NPI 1265406565, Norwalk, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2005
## Record status
- **NPPES last updated:** December 23, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1538401856) · Data from the CMS NPPES public registry.