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DR. STEPHEN ALAN SHERWIN M.D.
NPI 1437461431
Internal Medicine - Medical Oncology in San Francisco, CA

Active since July 07, 2010PECOS Enrolled
995 POTRERO AVENUE, BUILDING 80 WARD 84, SAN FRANCISCO, CA 94110(415) 476-4082 Get Directions Write a Review

NPPES record last updated: July 7, 2010. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Stephen Alan Sherwin M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. STEPHEN ALAN SHERWIN M.D. (NPI 1437461431) is an individual medical oncology provider in San Francisco, California, licensed in California (G41963) and active in the NPI registry since July 2010. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1437461431
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameDR. STEPHEN ALAN SHERWINCredential: M.D.
Location Address995 POTRERO AVENUE, BUILDING 80 WARD 84San Francisco, CA 94110
Mailing Address3508 Clay StSan Francisco, CA 94118-1839 · (415) 317-1230
Phone(415) 476-4082
Sole ProprietorYes
Enumeration DateJuly 7, 2010
✔ NPI 1437461431 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License✔ Licensed in CA · G41963
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
995 POTRERO AVENUE, San Francisco, CA 94110
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Stephen Alan Sherwin M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Stephen Sherwin reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

University Of California Sfgh Medical Group
Same address
Medical Oncology
995 POTRERO AVE, BLDG.80, RM 229
San Francisco, CA 94110
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1326013442 (California)
  • 637 clinicians in this Medicare group
NPI 1356696215 (415) 476-4082
City & County Of San Francisco
0.1 mi
General Acute Care Hospital
1001 POTRERO AVE, BUILDING 5, WARD 1B
San Francisco, CA 94110
  • Reassigned Medicare billing, California enrollment
  • 1,573 clinicians in this Medicare group
NPI 1083648810 (415) 759-4067

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 94110 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

MRS. MARY ANGELA SLAUGHTER RN
Registered Nurse (Psychiatric/Mental Health, Child & Adolescent)
995 POTRERO AVENUE, BUILDING 80 RM 239
SAN FRANCISCO, CA 94110
San Francisco County (415) 206-8386
DR. MARISA LYNN CRUZ M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
995 POTRERO AVENUE, BLDG. 90, WARD 92
SAN FRANCISCO, CA 94110
San Francisco County (628) 206-7749
DR. ROYCE C LIN MD
Internal Medicine
995 POTRERO AVENUE, BLDG 80 WARD 84
SAN FRANCISCO, CA 94110
San Francisco County (415) 476-4082
JUDITH ALDRIDGE LUCE MD
Internal Medicine (Medical Oncology)
995 POTRERO AVENUE, BLDG 80 WARD 84
SAN FRANCISCO, CA 94110
San Francisco County (415) 476-4082
CARLOS G MORA MOLINA LPCC
Counselor (Mental Health)
995 POTRERO AVENUE, BUILDING 80 2ND FLOOR
SAN FRANCISCO, CA 94110
San Francisco County (628) 206-3008
MRS. ELAINE MARTIN RN
Registered Nurse (Psychiatric/Mental Health, Child & Adolescent)
995 POTRERO AVENUE, BLDG 80 RM 239
SAN FRANCISCO, CA 94110
San Francisco County (415) 206-8386
SUSAN CRICHTON COFFEY MD
Internal Medicine
995 POTRERO AVENUE, BLDG 80 WARD 84
SAN FRANCISCO, CA 94110
San Francisco County (415) 476-4082
MAX ALLAN MCCLURE
Internal Medicine (Infectious Disease)
995 POTRERO AVENUE, BLDG. 80, WARD 86, FL. 6
SAN FRANCISCO, CA 94110
San Francisco County (628) 206-2400

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 Stephen Sherwin's NPI number?

The NPI number for Stephen Sherwin is 1437461431. It was assigned to this individual provider in the NPPES registry on July 7, 2010.

Where is Stephen Sherwin located?

Stephen Sherwin practices at 995 Potrero Avenue Building 80 Ward 84, San Francisco, CA 94110. The listed phone number is (415) 476-4082.

What is Stephen Sherwin's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Stephen Sherwin enrolled in Medicare?

Yes. Stephen Sherwin is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Stephen Sherwin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Sherwin reassigns Medicare benefits to 2 organizations: University Of California Sfgh Medical Group (San Francisco, CA) and City & County Of San Francisco (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 Stephen Sherwin'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 Stephen Sherwin was last updated on July 7, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.