JOHN TERENCE TAN SO MD
NPI 1801924295
Internal Medicine in Downey, CA
About John Terence Tan So Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN TERENCE TAN SO MD (NPI 1801924295) is an individual internal medicine provider in Downey, California, licensed in California (A98802) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS and is a graduate of Other (1999).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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
John Terence Tan So 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 Reassignments
3Medicare enrollment records show John Terence So reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Cerritos, CA 90703
- Reassigned Medicare billing, California enrollment
- 235 clinicians in this Medicare group
Los Alamitos, CA 90720
- Reassigned Medicare billing, California enrollment
- 228 clinicians in this Medicare group
Los Angeles, CA 90015
- Reassigned Medicare billing, California enrollment
- 2,052 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 90241 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 19
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DOWNEY, CA 90241
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 John Terence So's NPI number?
The NPI number for John Terence So is 1801924295. It was assigned to this individual provider in the NPPES registry on February 28, 2007.
Where is John Terence So located?
John Terence So practices at 10441 Lakewood Blvd Ste Ab, Downey, CA 90241. The listed phone number is (562) 869-1070.
What is John Terence So's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is John Terence So enrolled in Medicare?
Yes. John Terence So 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 John Terence So's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Terence So reassigns Medicare benefits to 3 organizations: Albion Medical Partners Of California West P C (Cerritos, CA), Centers For Family Medicine Gp (Los Alamitos, CA) and Healthcare Partners Affiliates Medical Group (Los Angeles, 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 John Terence So'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 John Terence So was last updated on November 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# John Terence Tan So, MD · NPI 1801924295
Internal Medicine physician in Downey, California. Individual provider, active in the CMS NPPES registry since February 28, 2007.
## Identity
- **NPI:** 1801924295 (Entity type: Individual)
- **Enumerated:** February 28, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A98802 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 10441 LAKEWOOD BLVD STE AB, Downey, CA 90241-2744
- **Phone:** (562) 869-1070 · **Fax:** (562) 286-8777
## 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): Albion Medical Partners Of California West P C (NPI 1073110607, Cerritos, CA); Centers For Family Medicine Gp (NPI 1467598243, Los Alamitos, CA); Healthcare Partners Affiliates Medical Group (NPI 1659312593, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1999
## Record status
- **NPPES last updated:** November 29, 2025
- **Other identifiers:** Other A98802 (CA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1801924295) · Data from the CMS NPPES public registry.