IVAN DEDRICK GAVIN HAMILTON M.D.
NPI 1669421202
Internal Medicine in San Francisco, CA
About Ivan Dedrick Gavin Hamilton M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
IVAN DEDRICK GAVIN HAMILTON M.D. (NPI 1669421202) is an individual internal medicine provider in San Francisco, California, licensed in California (A104632) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Georgetown University School Of Medicine (2002).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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
Ivan Dedrick Gavin Hamilton 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
3Medicare enrollment records show Ivan Hamilton reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94109
- Reassigned Medicare billing, California enrollment
- 962 clinicians in this Medicare group
Oakland, CA 94609
- Reassigned Medicare billing, California enrollment
- 187 clinicians in this Medicare group
Modesto, CA 95350
- Reassigned Medicare billing, California enrollment
- 176 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.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94115 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 FRANCISCO, CA 94115
SAN FRANCISCO, CA 94115
SAN FRANCISCO, CA 94115
SAN FRANCISCO, CA 94115
SAN FRANCISCO, CA 94115
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 Ivan Hamilton's NPI number?
The NPI number for Ivan Hamilton is 1669421202. It was assigned to this individual provider in the NPPES registry on May 10, 2006.
Where is Ivan Hamilton located?
Ivan Hamilton practices at 2351 Clay St Suite 308, San Francisco, CA 94115. The listed phone number is (415) 600-3458.
What is Ivan Hamilton's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Ivan Hamilton enrolled in Medicare?
Yes. Ivan Hamilton 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 Ivan Hamilton's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ivan Hamilton reassigns Medicare benefits to 3 organizations: Galen Inpatient Physicians Inc (San Francisco, CA), La Clinica De La Raza Inc (Oakland, CA) and Hospitalists Of Modesto Medical Group Inc (Modesto, 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 Ivan Hamilton'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 Ivan Hamilton was last updated on May 28, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Ivan Dedrick Gavin Hamilton, M.D. · NPI 1669421202
Internal Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since May 10, 2006.
## Identity
- **NPI:** 1669421202 (Entity type: Individual)
- **Enumerated:** May 10, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A104632 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2351 CLAY ST, SUITE 308, San Francisco, CA 94115-1931
- **Phone:** (415) 600-3458 · **Fax:** (415) 600-3451
## 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): Galen Inpatient Physicians Inc (NPI 1730313933, San Francisco, CA); La Clinica De La Raza Inc (NPI 1346262292, Oakland, CA); Hospitalists Of Modesto Medical Group Inc (NPI 1821190711, Modesto, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Georgetown University School Of Medicine, class of 2002
## Record status
- **NPPES last updated:** May 28, 2021
- **Other identifiers:** Other AV608Z (CA); Medicaid 1669421202 (CA); Medicaid 408417900 (MD)
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Source: [NPI Profile](https://npiprofile.com/npi/1669421202) · Data from the CMS NPPES public registry.