DR. MARUT K THONGCHAROEN
NPI 1710132980
Internal Medicine in San Leandro, CA
About Dr. Marut K Thongcharoen NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARUT K THONGCHAROEN (NPI 1710132980) is an individual internal medicine provider in San Leandro, California, licensed in California (C00141591) and active in the NPI registry since December 2008. He is enrolled in Medicare PECOS and is a graduate of Other (2005).
NPPES Registry Identity
Specialties & Licenses 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. Marut K Thongcharoen 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 Marut Thongcharoen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94109
- Reassigned Medicare billing, California enrollment
- 213 clinicians in this Medicare group
Colton, CA 92324
- Reassigned Medicare billing, California enrollment
- 338 clinicians in this Medicare group
Tinton Falls, NJ 07701
- Reassigned Medicare billing, New York enrollment
- 52 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 94577 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.
Other Providers at the Same Location NPPES 16
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN LEANDRO, CA 94577
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 Marut Thongcharoen's NPI number?
The NPI number for Marut Thongcharoen is 1710132980. It was assigned to this individual provider in the NPPES registry on December 1, 2008.
Where is Marut Thongcharoen located?
Marut Thongcharoen practices at 2800 Benedict Dr, San Leandro, CA 94577. The listed phone number is (510) 357-8300.
What is Marut Thongcharoen's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Marut Thongcharoen enrolled in Medicare?
Yes. Marut Thongcharoen 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 Marut Thongcharoen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marut Thongcharoen reassigns Medicare benefits to 3 organizations: Pacific Inpatient Medical Group (San Francisco, CA), Quantum Healthcare Medical Associates Inc. (Colton, CA) and Newburgh Physician Services PC (Tinton Falls, NJ). 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 Marut Thongcharoen'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 Marut Thongcharoen was last updated on April 9, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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. Marut K Thongcharoen · NPI 1710132980
Internal Medicine physician in San Leandro, California. Individual provider, active in the CMS NPPES registry since December 1, 2008.
## Identity
- **NPI:** 1710132980 (Entity type: Individual)
- **Enumerated:** December 1, 2008
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** C00141591 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2800 BENEDICT DR, San Leandro, CA 94577-6840
- **Phone:** (510) 357-8300 · **Fax:** (510) 620-3924
## 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): Pacific Inpatient Medical Group (NPI 1447447248, San Francisco, CA); Quantum Healthcare Medical Associates Inc. (NPI 1568490597, Colton, CA); Newburgh Physician Services PC (NPI 1205268364, Tinton Falls, NJ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2005
## Record status
- **NPPES last updated:** April 9, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1710132980) · Data from the CMS NPPES public registry.