STEVEN GRANT DEEKS MD
NPI 1073604666
Internal Medicine - Medical Oncology in San Francisco, CA
About Steven Grant Deeks Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEVEN GRANT DEEKS MD (NPI 1073604666) is an individual medical oncology provider in San Francisco, California, licensed in California (G73895) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in San Francisco.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 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 (PECOS)
Steven Grant Deeks Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
5Medicare enrollment records show Steven Deeks reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 2,112 clinicians in this Medicare group
San Francisco, CA 94116
- Reassigned Medicare billing, California enrollment
- 1,573 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1326013442 (California), NPI 1366417933 (California)
- 637 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 94143 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 FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
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 Steven Deeks's NPI number?
The NPI number for Steven Deeks is 1073604666. It was assigned to this individual provider in the NPPES registry on September 27, 2006.
Where is Steven Deeks located?
Steven Deeks practices at 513 Parnassus Ave, San Francisco, CA 94143. The listed phone number is (415) 476-9362.
What is Steven Deeks's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Steven Deeks enrolled in Medicare?
Yes. Steven Deeks is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Steven Deeks's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steven Deeks reassigns Medicare benefits to 5 organizations: Ucsf Medical Group Business Services (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Regents Of The University Of California (San Francisco, CA), City & County Of San Francisco (San Francisco, CA) and University Of California Sfgh Medical Group (San Francisco, 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 Steven Deeks'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 Steven Deeks was last updated on April 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Steven Grant Deeks, MD · NPI 1073604666
Medical Oncology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since September 27, 2006.
## Identity
- **NPI:** 1073604666 (Entity type: Individual)
- **Enumerated:** September 27, 2006
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** G73895 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 513 PARNASSUS AVE, San Francisco, CA 94143-2205
- **Phone:** (415) 476-9362
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); University Of California San Francisco (NPI 1164512851, San Francisco, CA); Regents Of The University Of California (NPI 1376613943, San Francisco, CA); City & County Of San Francisco (NPI 1528083300, San Francisco, CA); University Of California Sfgh Medical Group (NPI 1356696215, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 28, 2026
- **Other identifiers:** Medicaid 00G738950 (CA); Other 010050556 (CA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1073604666) · Data from the CMS NPPES public registry.