JOHN STILLSON MD
NPI 1902556202
Family Medicine in Chula Vista, CA
About John Stillson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN STILLSON MD (NPI 1902556202) is an individual family medicine provider in Chula Vista, California, licensed in California (A202111) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS, is affiliated with Hamilton General Hospital, and maintains a secondary practice location in Chula Vista.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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
John Stillson 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
9Medicare enrollment records show John Stillson reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chula Vista, CA 91910
- Reassigned Medicare billing, California enrollment
- 3 clinicians in this Medicare group
Chula Vista, CA 91910
- Reassigned Medicare billing, California enrollment
- 4 clinicians in this Medicare group
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 218 clinicians in this Medicare group
Brawley, CA 92227
- Reassigned Medicare billing, California enrollment
- 2 clinicians in this Medicare group
Los Angeles, CA 90023
- Reassigned Medicare billing, California enrollment
- 30 clinicians in this Medicare group
Lubbock, TX 79401
- Reassigned Medicare billing, Texas enrollment
- 1,439 clinicians in this Medicare group
Lubbock, TX 79401
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: Concord Medical Group PLLC
- 1,338 clinicians in this Medicare group
Goldthwaite, TX 76844
- Reassigned Medicare billing, Texas enrollment
- Also billed through NPI 1326037607 (Texas)
- 41 clinicians in this Medicare group
Tuscaloosa, AL 35401
- Reassigned Medicare billing, Alabama enrollment
- 124 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.
Hamilton General Hospital
Critical Access Hospitals · Hamilton, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91910 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Stillson's NPI number?
The NPI number for John Stillson is 1902556202. It was assigned to this individual provider in the NPPES registry on March 28, 2022.
Where is John Stillson located?
John Stillson practices at 340 4th Ave Ste 2, Chula Vista, CA 91910. The listed phone number is (619) 422-8338.
What is John Stillson's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is John Stillson enrolled in Medicare?
Yes. John Stillson 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 Stillson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Stillson reassigns Medicare benefits to 9 organizations: Southern California Health Providers Medical Grp Inc (Chula Vista, CA), Gregory J Wiener M D Professional Corporation (Chula Vista, CA), On Call Specialists Medical Group Of San Diego, Inc. (San Diego, CA), Patrick Sweet MD PC (Brawley, CA), East La Emergency Physicians, Inc. (Los Angeles, CA) and 4 more organizations, listed in the Medicare section above. 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 Stillson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Stillson accept?
Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 1 other insurer list John Stillson 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 John Stillson affiliated with any hospitals?
According to CMS data, John Stillson is affiliated with Hamilton General Hospital.
When was this NPI record last updated?
The NPPES record for John Stillson was last updated on November 5, 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 Stillson, MD · NPI 1902556202
Family Medicine physician in Chula Vista, California. Individual provider, active in the CMS NPPES registry since March 28, 2022.
## Identity
- **NPI:** 1902556202 (Entity type: Individual)
- **Enumerated:** March 28, 2022
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** A202111 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 340 4TH AVE STE 2, Chula Vista, CA 91910-3883
- **Phone:** (619) 422-8338
## 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:** 9 organizations under Medicare reassignment (form CMS-855R): Southern California Health Providers Medical Grp Inc (NPI 1851368161, Chula Vista, CA); Gregory J Wiener M D Professional Corporation (NPI 1376728287, Chula Vista, CA); On Call Specialists Medical Group Of San Diego, Inc. (NPI 1962175836, San Diego, CA); Patrick Sweet MD PC (NPI 1306406251, Brawley, CA); East La Emergency Physicians, Inc. (NPI 1588198055, Los Angeles, CA); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Indiana University School Of Medicine, class of 2022
## Record status
- **NPPES last updated:** November 5, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1902556202) · Data from the CMS NPPES public registry.