DR. AMY C TREWELLA MD
NPI 1376513119
Family Medicine in San Marcos, CA
About Dr. Amy C Trewella Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. AMY C TREWELLA MD (NPI 1376513119) is an individual family medicine provider in San Marcos, California, licensed in California (A99176) and active in the NPI registry since January 2006. She is enrolled in Medicare PECOS and is a graduate of Creighton University School Of Medicine (2005).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Other Identifiers 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. Amy C Trewella 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
2Medicare enrollment records show Amy Trewella reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Escondido, CA 92029
- Reassigned Medicare billing, California enrollment
- 144 clinicians in this Medicare group
Los Angeles, CA 90048
- Reassigned Medicare billing, California enrollment
- 2,118 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 92069 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 15
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Amy Trewella's NPI number?
The NPI number for Amy Trewella is 1376513119. It was assigned to this individual provider in the NPPES registry on January 24, 2006. The provider is also known as Dr. Amy C Trewella - Velazquez MD.
Where is Amy Trewella located?
Amy Trewella practices at 277 Rancheros Dr Suite 100, San Marcos, CA 92069. The listed phone number is (760) 291-6700.
What is Amy Trewella's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Amy Trewella enrolled in Medicare?
Yes. Amy Trewella 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 Amy Trewella's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Amy Trewella reassigns Medicare benefits to 2 organizations: Arch Health Partners (Escondido, CA) and Cedars-Sinai Medical Care Foundation (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 Amy Trewella'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 Amy Trewella was last updated on August 9, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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. Amy C Trewella, MD · NPI 1376513119
Family Medicine physician in San Marcos, California. Individual provider, active in the CMS NPPES registry since January 24, 2006.
## Identity
- **NPI:** 1376513119 (Entity type: Individual)
- **Enumerated:** January 24, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** A99176 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 277 RANCHEROS DR, SUITE 100, San Marcos, CA 92069-2959
- **Phone:** (760) 291-6700 · **Fax:** (760) 471-0513
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Arch Health Partners (NPI 1295329787, Escondido, CA); Cedars-Sinai Medical Care Foundation (NPI 1316984388, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Creighton University School Of Medicine, class of 2005
## Record status
- **NPPES last updated:** August 9, 2012
- **Other identifiers:** Other A 99176 (CA); Other GG379Z (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1376513119) · Data from the CMS NPPES public registry.