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ANDREA HARZSTARK MD
NPI 1871766576
Internal Medicine - Hematology & Oncology in San Francisco, CA

Active since April 02, 2008PECOS Enrolled
1600 DIVISADERO ST, UROLOGIC ONCOLOGY, 3RD FLOOR, BOX 1711, SAN FRANCISCO, CA 94143(415) 353-7171 Get Directions Write a Review

NPPES record last updated: December 15, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Andrea Harzstark Md NPPES

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

ANDREA HARZSTARK MD (NPI 1871766576) is an individual hematology & oncology provider in San Francisco, California, licensed in California (A86175) and active in the NPI registry since April 2008. She is enrolled in Medicare PECOS and is a graduate of Stanford University School Of Medicine (2002).

NPPES Registry Identity

NPI1871766576
Entity TypeIndividualFemale
Primary Taxonomy207RH0003X
Provider Legal NameANDREA HARZSTARKCredential: MD
Location Address1600 DIVISADERO ST, UROLOGIC ONCOLOGY, 3RD FLOOR, BOX 1711San Francisco, CA 94143-3010
Mailing Address1600 Divisadero St, Urologic Oncology, 3rd Floor, Box 1711San Francisco, CA 94143-3010
Phone(415) 353-7171
Sole ProprietorNo
Medical School CMSStanford University School Of MedicineGraduated 2002
Enumeration DateApril 2, 2008
Last NPPES UpdateDecember 15, 2021
✔ NPI 1871766576 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in CA · A86175
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
1600 DIVISADERO ST, San Francisco, CA 94143
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Andrea Harzstark Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID9234203357
PECOS Enrollment IDI20260603002780
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 Andrea Harzstark reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Permanente Medical Group Inc
0.1 mi
Internal Medicine
2238 GEARY
San Francisco, CA 94116
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1841373800 (415) 833-2200
Hawaii Permanente Medical Group Inc
2,396 mi
Health Maintenance Organization
3288 MOANALUA RD
Honolulu, HI 96819
  • Reassigned Medicare billing, Hawaii enrollment
  • 1,187 clinicians in this Medicare group
NPI 1710945969 (808) 432-0000

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.

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.

MERLIN D LARSON MD
Anesthesiology
1600 DIVISADERO ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 885-7412
DEVIN ARTHUR OLLER MD
Internal Medicine
1600 DIVISADERO ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 353-7900
MELANIE I. ZUK-MOYA PTA
Physical Therapy Assistant
1600 DIVISADERO ST
SAN FRANCISCO, CA 94143
San Francisco County (646) 770-6621
HWA SOO HOANG MD
Psychiatry & Neurology (Psychiatry)
1600 DIVISADERO ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-7000
MEGHAN JAIRAM MD
Radiology (Diagnostic Radiology)
1600 DIVISADERO ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 885-7464
NAOMI JAY NP
Nurse Practitioner
1600 DIVISADERO ST, 4TH FLOOR
SAN FRANCISCO, CA 94143
San Francisco County (415) 353-7443
MEGAN SWANSON M.D.
Obstetrics & Gynecology
1600 DIVISADERO ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 206-4069
NIKI LOVICK LCGC
Genetic Counselor, MS
1600 DIVISADERO ST, 4TH FLOOR BOX 1774
SAN FRANCISCO, CA 94143
San Francisco County (415) 514-8778

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 Andrea Harzstark's NPI number?

The NPI number for Andrea Harzstark is 1871766576. It was assigned to this individual provider in the NPPES registry on April 2, 2008.

Where is Andrea Harzstark located?

Andrea Harzstark practices at 1600 Divisadero St Urologic Oncology, 3rd Floor, Box 1711, San Francisco, CA 94143. The listed phone number is (415) 353-7171.

What is Andrea Harzstark's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Andrea Harzstark enrolled in Medicare?

Yes. Andrea Harzstark is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Andrea Harzstark's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Andrea Harzstark reassigns Medicare benefits to 2 organizations: Permanente Medical Group Inc (San Francisco, CA) and Hawaii Permanente Medical Group Inc (Honolulu, HI). 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 Andrea Harzstark'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 Andrea Harzstark was last updated on December 15, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.