ELLEN JANE ZEMARKOWITZ LCSW
NPI 1053252957
Counselor - Mental Health in Palo Alto, CA
About Ellen Jane Zemarkowitz Lcsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ELLEN JANE ZEMARKOWITZ LCSW (NPI 1053252957) is an individual mental health provider in Palo Alto, California, licensed in California (89459) and active in the NPI registry since April 2026. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ellen Jane Zemarkowitz Lcsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
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.
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 Ellen Zemarkowitz's NPI number?
The NPI number for Ellen Zemarkowitz is 1053252957. It was assigned to this individual provider in the NPPES registry on April 3, 2026.
Where is Ellen Zemarkowitz located?
Ellen Zemarkowitz practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 497-8000.
What is Ellen Zemarkowitz's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.
Is Ellen Zemarkowitz enrolled in Medicare?
Yes. Ellen Zemarkowitz is registered in the Medicare PECOS enrollment system.
When was this NPI record last updated?
The NPPES record for Ellen Zemarkowitz was last updated on July 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Ellen Jane Zemarkowitz, LCSW · NPI 1053252957
Mental Health provider in Palo Alto, California. Individual provider, active in the CMS NPPES registry since April 3, 2026.
## Identity
- **NPI:** 1053252957 (Entity type: Individual)
- **Enumerated:** April 3, 2026
- **Primary specialty:** Counselor - Mental Health · taxonomy 101YM0800X
- **State license:** 89459 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 725 WELCH RD, Palo Alto, CA 94304-1601
- **Phone:** (650) 497-8000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
## Record status
- **NPPES last updated:** July 30, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1053252957) · Data from the CMS NPPES public registry.