FAN ZHANG MD
NPI 1619051695
Internal Medicine - Medical Oncology in Santa Rosa, CA
About Fan Zhang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
FAN ZHANG MD (NPI 1619051695) is an individual medical oncology provider in Santa Rosa, California, licensed in California (81734) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Great Plains Health, and is a graduate of Other (1986).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
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
Fan Zhang 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 Reassignments
4Medicare enrollment records show Fan Zhang reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Santa Rosa, CA 95403
- Reassigned Medicare billing, California enrollment
- 132 clinicians in this Medicare group
Vallejo, CA 94589
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
North Platte, NE 69101
- Reassigned Medicare billing, Nebraska enrollment
- 365 clinicians in this Medicare group
Anchorage, AK 99508
- Reassigned Medicare billing, Texas enrollment
- 1,373 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
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Great Plains Health
Acute Care Hospitals · North Platte, NEPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 95403 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.
SANTA ROSA, CA 95403
SANTA ROSA, CA 95403
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 Fan Zhang's NPI number?
The NPI number for Fan Zhang is 1619051695. It was assigned to this individual provider in the NPPES registry on October 25, 2006.
Where is Fan Zhang located?
Fan Zhang practices at 401 Bicentennial Way, Santa Rosa, CA 95403. The listed phone number is (707) 571-4000.
What is Fan Zhang's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Fan Zhang enrolled in Medicare?
Yes. Fan Zhang 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 Fan Zhang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Fan Zhang reassigns Medicare benefits to 4 organizations: Sutter Bay Hospitals (Santa Rosa, CA), Permanente Medical Group Inc (Vallejo, CA), North Platte Nebraska Hospital Corporation (North Platte, NE) and Alaska Native Tribal Health Consortium (Anchorage, AK). 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 Fan Zhang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Fan Zhang affiliated with any hospitals?
According to CMS data, Fan Zhang is affiliated with Great Plains Health.
When was this NPI record last updated?
The NPPES record for Fan Zhang was last updated on March 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Fan Zhang, MD · NPI 1619051695
Medical Oncology physician in Santa Rosa, California. Individual provider, active in the CMS NPPES registry since October 25, 2006.
## Identity
- **NPI:** 1619051695 (Entity type: Individual)
- **Enumerated:** October 25, 2006
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** 81734 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 401 BICENTENNIAL WAY, Santa Rosa, CA 95403-2149
- **Phone:** (707) 571-4000
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Sutter Bay Hospitals (NPI 1740413798, Santa Rosa, CA); Permanente Medical Group Inc (NPI 1336222397, Vallejo, CA); North Platte Nebraska Hospital Corporation (NPI 1134355332, North Platte, NE); Alaska Native Tribal Health Consortium (NPI 1437189339, Anchorage, AK) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1986
## Record status
- **NPPES last updated:** March 5, 2026
- **Other identifiers:** Medicaid 00A817340 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1619051695) · Data from the CMS NPPES public registry.