DR. ZINA SEMENOVSKAYA MD
NPI 1255560181
Emergency Medicine in Palo Alto, CA
About Dr. Zina Semenovskaya Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ZINA SEMENOVSKAYA MD (NPI 1255560181) is an individual emergency medicine provider in Palo Alto, California, licensed in California (A125620) and active in the NPI registry since July 2009. She is enrolled in Medicare PECOS and is a graduate of Js Weill Medical College, Cornell University (2009).
NPPES Registry Identity
Specialties & Licenses
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. Zina Semenovskaya 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
8Medicare enrollment records show Zina Semenovskaya reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Redwood City, CA 94062
- Reassigned Medicare billing, California enrollment
- 2,323 clinicians in this Medicare group
Newark, CA 94560
- Reassigned Medicare billing, California enrollment
- 900 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 842 clinicians in this Medicare group
San Ramon, CA 94583
- Reassigned Medicare billing, California enrollment
- 168 clinicians in this Medicare group
Quincy, CA 95971
- Reassigned Medicare billing, California enrollment
- 48 clinicians in this Medicare group
Delano, CA 93215
- Reassigned Medicare billing, California enrollment
- 301 clinicians in this Medicare group
New York, NY 10029
- Reassigned Medicare billing, New York enrollment
- 1,067 clinicians in this Medicare group
Brooklyn, NY 11212
- Reassigned Medicare billing, New York enrollment
- 782 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 94304 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
PALO ALTO, CA 94304
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 Zina Semenovskaya's NPI number?
The NPI number for Zina Semenovskaya is 1255560181. It was assigned to this individual provider in the NPPES registry on July 13, 2009.
Where is Zina Semenovskaya located?
Zina Semenovskaya practices at 300 Pasteur Dr, Palo Alto, CA 94304. The listed phone number is (718) 836-6600.
What is Zina Semenovskaya's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Zina Semenovskaya enrolled in Medicare?
Yes. Zina Semenovskaya 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 Zina Semenovskaya's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Zina Semenovskaya reassigns Medicare benefits to 8 organizations: Cep America - California (Redwood City, CA), Alameda Health System (Newark, CA), University Of California Sfgh Medical Group (San Francisco, CA), San Francisco Physicians International Medical Group, Inc (San Ramon, CA), Chavez Emergency Physicians Medical Group, Inc. (Quincy, CA) and 3 more organizations, listed in the Medicare section above. 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 Zina Semenovskaya'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 Zina Semenovskaya was last updated on July 3, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Dr. Zina Semenovskaya, MD · NPI 1255560181
Emergency Medicine physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since July 13, 2009.
## Identity
- **NPI:** 1255560181 (Entity type: Individual)
- **Enumerated:** July 13, 2009
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A125620 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 PASTEUR DR, Palo Alto, CA 94304-2203
- **Phone:** (718) 836-6600
## 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:** 8 organizations under Medicare reassignment (form CMS-855R): Cep America - California (NPI 1487609996, Redwood City, CA); Alameda Health System (NPI 1497956288, Newark, CA); University Of California Sfgh Medical Group (NPI 1174598296, San Francisco, CA); San Francisco Physicians International Medical Group, Inc (NPI 1841220720, San Ramon, CA); Chavez Emergency Physicians Medical Group, Inc. (NPI 1689045015, Quincy, CA); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Js Weill Medical College, Cornell University, class of 2009
## Record status
- **NPPES last updated:** July 3, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1255560181) · Data from the CMS NPPES public registry.