MARVIN L. TAN MD
NPI 1942377817
Pediatrics - Developmental - Behavioral Pediatrics in Bellflower, CA
About Marvin L. Tan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARVIN L. TAN MD (NPI 1942377817) is an individual developmental - behavioral pediatrics provider in Bellflower, California, licensed in California (G74523) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of University Of California, Irvine, California College Of Medicine (1990).
NPPES Registry Identity
Specialties & Licenses
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
Marvin L. Tan 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 Reassignment
Medicare enrollment records show Marvin Tan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Bellflower, CA 90706
- Reassigned Medicare billing, California enrollment
- 13,921 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.
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.
BELLFLOWER, CA 90706
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 Marvin Tan's NPI number?
The NPI number for Marvin Tan is 1942377817. It was assigned to this individual provider in the NPPES registry on November 29, 2006.
Where is Marvin Tan located?
Marvin Tan practices at 9400 Rosecrans Ave, Bellflower, CA 90706. The listed phone number is (562) 461-3000.
What is Marvin Tan's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Developmental - Behavioral Pediatrics, with taxonomy code 2080P0006X.
Is Marvin Tan enrolled in Medicare?
Yes. Marvin Tan 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 organization bills Medicare for Marvin Tan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marvin Tan reassigns Medicare benefits to Southern California Permanente Medical Group (Bellflower, CA). The 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 Marvin Tan'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 Marvin Tan was last updated on November 30, 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.
# Marvin L. Tan, MD · NPI 1942377817
Developmental - Behavioral Pediatrics physician in Bellflower, California. Individual provider, active in the CMS NPPES registry since November 29, 2006.
## Identity
- **NPI:** 1942377817 (Entity type: Individual)
- **Enumerated:** November 29, 2006
- **Primary specialty:** Pediatrics - Developmental - Behavioral Pediatrics · taxonomy 2080P0006X
- **State license:** G74523 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 9400 ROSECRANS AVE, Bellflower, CA 90706-2246
- **Phone:** (562) 461-3000
## 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:** Southern California Permanente Medical Group (NPI 1043242555, Bellflower, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Irvine, California College Of Medicine, class of 1990
## Record status
- **NPPES last updated:** November 30, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1942377817) · Data from the CMS NPPES public registry.