MARVIN SO MD, MPH
NPI 1245961879
Family Medicine in Boston, MA
About Marvin So Md, Mph NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARVIN SO MD, MPH (NPI 1245961879) is an individual family medicine provider in Boston, Massachusetts, licensed in Massachusetts (1025088) and active in the NPI registry since June 2022. He is enrolled in Medicare PECOS, is affiliated with Boston Medical Center, and is a graduate of Other (2022).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
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 So Md, Mph 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 So reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
East Boston, MA 02128
- Reassigned Medicare billing, Massachusetts enrollment
- 577 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Boston Medical Center
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02128 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
EAST BOSTON, MA 02128
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 So's NPI number?
The NPI number for Marvin So is 1245961879. It was assigned to this individual provider in the NPPES registry on June 23, 2022.
Where is Marvin So located?
Marvin So practices at 20 Maverick Sq, Boston, MA 02128. The listed phone number is (617) 569-5800.
What is Marvin So's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Marvin So enrolled in Medicare?
Yes. Marvin 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 organization bills Medicare for Marvin So's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marvin So reassigns Medicare benefits to Internal Medical Associates-Ebnhc (East Boston, MA). 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 So's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marvin So accept?
Health plans from Anthem Blue Cross and Blue Shield list Marvin So as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Marvin So affiliated with any hospitals?
According to CMS data, Marvin So is affiliated with Boston Medical Center.
When was this NPI record last updated?
The NPPES record for Marvin So was last updated on September 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Marvin So, MD, MPH · NPI 1245961879
Family Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since June 23, 2022.
## Identity
- **NPI:** 1245961879 (Entity type: Individual)
- **Enumerated:** June 23, 2022
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 1025088 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 20 MAVERICK SQ, Boston, MA 02128-2335
- **Phone:** (617) 569-5800 · **Fax:** (617) 568-4585
## 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:** Internal Medical Associates-Ebnhc (NPI 1558481879, East Boston, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** September 30, 2025
---
Source: [NPI Profile](https://npiprofile.com/npi/1245961879) · Data from the CMS NPPES public registry.