DR. JOHN W ADAMSON MD
NPI 1477504801
Internal Medicine - Hematology in San Diego, CA
About Dr. John W Adamson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN W ADAMSON MD (NPI 1477504801) is an individual hematology provider in San Diego, California, licensed in California (A20742) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of University Of California, Geffen School Of Medicine (1962).
NPPES Registry Identity
Specialties & Licenses
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. John W Adamson 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 Reassignment
Medicare enrollment records show John Adamson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 1,051 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 5
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 92122 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 92122
SAN DIEGO, CA 92122
SAN DIEGO, CA 92122
SAN DIEGO, CA 92122
SAN DIEGO, CA 92122
SAN DIEGO, CA 92122
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 Adamson's NPI number?
The NPI number for John Adamson is 1477504801. It was assigned to this individual provider in the NPPES registry on May 12, 2006.
Where is John Adamson located?
John Adamson practices at 8929 University Center Ln Suite 201, San Diego, CA 92122. The listed phone number is (858) 405-2272.
What is John Adamson's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology, with taxonomy code 207RH0000X.
Is John Adamson enrolled in Medicare?
Yes. John Adamson 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 organization bills Medicare for John Adamson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Adamson reassigns Medicare benefits to Regents Of The University Of California (San Diego, CA). The 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 Adamson'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 Adamson was last updated on November 12, 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.
# Dr. John W Adamson, MD · NPI 1477504801
Hematology physician in San Diego, California. Individual provider, active in the CMS NPPES registry since May 12, 2006.
## Identity
- **NPI:** 1477504801 (Entity type: Individual)
- **Enumerated:** May 12, 2006
- **Primary specialty:** Internal Medicine - Hematology · taxonomy 207RH0000X
- **State license:** A20742 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 8929 UNIVERSITY CENTER LN, SUITE 201, San Diego, CA 92122-1006
- **Phone:** (858) 405-2272 · **Fax:** (858) 550-9032
## 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:** Regents Of The University Of California (NPI 1487772380, San Diego, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Geffen School Of Medicine, class of 1962
## Record status
- **NPPES last updated:** November 12, 2025
- **Other identifiers:** Other 007000215T; Medicaid 32601800 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1477504801) · Data from the CMS NPPES public registry.