DR. THEARITH SENG M.D.
NPI 1962797522
Family Medicine in Walnut Creek, CA
About Dr. Thearith Seng M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. THEARITH SENG M.D. (NPI 1962797522) is an individual family medicine provider in Walnut Creek, California, licensed in California (A124581) and active in the NPI registry since June 2011. He is enrolled in Medicare PECOS and is a graduate of University Of California, Geffen School Of Medicine (2011).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
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
Dr. Thearith Seng M.d. 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 Thearith Seng reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Walnut Creek, CA 94597
- Reassigned Medicare billing, California enrollment
- 650 clinicians in this Medicare group
Walnut Creek, CA 94598
- Reassigned Medicare billing, California enrollment
- 810 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 842 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94597 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WALNUT CREEK, CA 94597
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 Thearith Seng's NPI number?
The NPI number for Thearith Seng is 1962797522. It was assigned to this individual provider in the NPPES registry on June 12, 2011.
Where is Thearith Seng located?
Thearith Seng practices at 1450 Treat Blvd Suite 160, Walnut Creek, CA 94597. The listed phone number is (925) 296-9000.
What is Thearith Seng's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Thearith Seng enrolled in Medicare?
Yes. Thearith Seng 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 Thearith Seng's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Thearith Seng reassigns Medicare benefits to 3 organizations: John Muir Physician Network (Walnut Creek, CA), John Muir Trauma Physicians Billing Service (Walnut Creek, CA) and University Of California Sfgh Medical Group (San Francisco, 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 Thearith Seng'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 Thearith Seng was last updated on September 29, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Dr. Thearith Seng, M.D. · NPI 1962797522
Family Medicine physician in Walnut Creek, California. Individual provider, active in the CMS NPPES registry since June 12, 2011.
## Identity
- **NPI:** 1962797522 (Entity type: Individual)
- **Enumerated:** June 12, 2011
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** A124581 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1450 TREAT BLVD, SUITE 160, Walnut Creek, CA 94597-2168
- **Phone:** (925) 296-9000 · **Fax:** (925) 296-9071
## 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): John Muir Physician Network (NPI 1841407665, Walnut Creek, CA); John Muir Trauma Physicians Billing Service (NPI 1962551861, Walnut Creek, CA); University Of California Sfgh Medical Group (NPI 1174598296, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Geffen School Of Medicine, class of 2011
## Record status
- **NPPES last updated:** September 29, 2015
- **Other identifiers:** Medicare PIN CA137861 (CA); Other P01496487 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1962797522) · Data from the CMS NPPES public registry.