DR. JOHN M. CARETHERS M.D.
NPI 1518048990
Internal Medicine - Gastroenterology in La Jolla, CA
About Dr. John M. Carethers M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN M. CARETHERS M.D. (NPI 1518048990) is an individual gastroenterology provider in La Jolla, California, licensed in California (G081894) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of Wayne State University School Of Medicine (1985).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 3
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. John M. Carethers M.d. 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 John Carethers reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 1,051 clinicians in this Medicare group
Traverse City, MI 49684
- Reassigned Medicare billing, Michigan enrollment
- 2,377 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 92037 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.
LA JOLLA, CA 92037
LA JOLLA, CA 92037
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 Carethers's NPI number?
The NPI number for John Carethers is 1518048990. It was assigned to this individual provider in the NPPES registry on October 18, 2006.
Where is John Carethers located?
John Carethers practices at 9350 Campus Point Dr, La Jolla, CA 92037. The listed phone number is (800) 926-8273.
What is John Carethers's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is John Carethers enrolled in Medicare?
Yes. John Carethers 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 Carethers's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Carethers reassigns Medicare benefits to 2 organizations: Regents Of The University Of California (San Diego, CA) and Regents Of The University Of Michigan (Traverse City, MI). 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 Carethers'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 Carethers was last updated on June 28, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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. John M. Carethers, M.D. · NPI 1518048990
Gastroenterology physician in La Jolla, California. Individual provider, active in the CMS NPPES registry since October 18, 2006.
## Identity
- **NPI:** 1518048990 (Entity type: Individual)
- **Enumerated:** October 18, 2006
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** G081894 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 9350 CAMPUS POINT DR, La Jolla, CA 92037-1300
- **Phone:** (800) 926-8273
## 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): Regents Of The University Of California (NPI 1487772380, San Diego, CA); Regents Of The University Of Michigan (NPI 1992081640, Traverse City, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Wayne State University School Of Medicine, class of 1985
## Record status
- **NPPES last updated:** June 28, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1518048990) · Data from the CMS NPPES public registry.