MATTHEW E. SITZER MD
NPI 1871641860
Internal Medicine - Gastroenterology in San Diego, CA
About Matthew E. Sitzer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MATTHEW E. SITZER MD (NPI 1871641860) is an individual gastroenterology provider in San Diego, California, licensed in California (G62045) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of University Of California, San Diego School Of Medicine (1986).
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
Matthew E. Sitzer 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 Matthew Sitzer reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92120
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
Twin Bridges, CA 95735
- Reassigned Medicare billing, California enrollment
- 126 clinicians in this Medicare group
South Lake Tahoe, CA 96150
- Reassigned Medicare billing, California enrollment
- 148 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 92120 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.
SAN DIEGO, CA 92120
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 Matthew Sitzer's NPI number?
The NPI number for Matthew Sitzer is 1871641860. It was assigned to this individual provider in the NPPES registry on January 8, 2007.
Where is Matthew Sitzer located?
Matthew Sitzer practices at 4647 Zion Ave, San Diego, CA 92120. The listed phone number is (619) 528-5000.
What is Matthew Sitzer's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Matthew Sitzer enrolled in Medicare?
Yes. Matthew Sitzer 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 Matthew Sitzer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Matthew Sitzer reassigns Medicare benefits to 3 organizations: Southern California Permanente Medical Group (San Diego, CA), Barton Healthcare System (Twin Bridges, CA) and Barton Medical Foundation (South Lake Tahoe, 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 Matthew Sitzer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Matthew Sitzer accept?
Health plans from Molina Healthcare list Matthew Sitzer 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.
When was this NPI record last updated?
The NPPES record for Matthew Sitzer was last updated on December 1, 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.
# Matthew E. Sitzer, MD · NPI 1871641860
Gastroenterology physician in San Diego, California. Individual provider, active in the CMS NPPES registry since January 8, 2007.
## Identity
- **NPI:** 1871641860 (Entity type: Individual)
- **Enumerated:** January 8, 2007
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** G62045 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4647 ZION AVE, San Diego, CA 92120-2507
- **Phone:** (619) 528-5000
## 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): Southern California Permanente Medical Group (NPI 1225060742, San Diego, CA); Barton Healthcare System (NPI 1114033529, Twin Bridges, CA); Barton Medical Foundation (NPI 1750950499, South Lake Tahoe, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Diego School Of Medicine, class of 1986
## Record status
- **NPPES last updated:** December 1, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1871641860) · Data from the CMS NPPES public registry.