Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ILANA WITHOP NP
NPI 1154374361
Nurse Practitioner in San Francisco, CA

Q: What is Ilana Withop's NPI number?

The NPI number for Ilana Withop is 1154374361. It was assigned to this individual provider in the NPPES registry on May 18, 2006.

Q: What is Ilana Withop's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Q: When was this NPI record last updated?

The NPPES record for Ilana Withop was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 41 days 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.

Active since May 18, 2006

400 PARNASSUS AVE, SAN FRANCISCO, CA 94143(415) 353-2771(415) 353-2657 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

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About Ilana Withop Np NPPES

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

ILANA WITHOP NP (NPI 1154374361) is an individual nurse practitioner in San Francisco, California, licensed in California (NP 11701) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1154374361

Entity TypeIndividualFemale

Primary Taxonomy363L00000X

Provider Legal NameILANA WITHOPCredential: NP

Location Address400 PARNASSUS AVESan Francisco, CA 94143-2202

Mailing Address1635 Divisadero St, Ste 625, Box 1821San Francisco, CA 94143-0001 · (415) 476-4029 · Fax (415) 476-4150

Phone(415) 353-2771

Fax(415) 353-2657

Sole ProprietorNo

Enumeration DateMay 18, 2006

Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration

✔ NPI 1154374361 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

License✔ Licensed in CA · NP 11701

Definition

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Also ListedRegistered NurseTaxonomy 163W00000X · License NP 11701 (CA)

400 PARNASSUS AVE, San Francisco, CA 94143

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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.

DR. ALEJANDRA GABRIELA DE ALBA CAMPOMANES MD, MPH

Ophthalmology

400 PARNASSUS AVE
SAN FRANCISCO, CA 94143

San Francisco County (415) 353-2560

DR. MARISSA A BOECK M.D.

Surgery (Surgical Critical Care)

400 PARNASSUS AVE
SAN FRANCISCO, CA 94143

San Francisco County (415) 353-2161

DR. JACQUELINE EVA WEINSTEIN M.D.

Otolaryngology (Pediatric Otolaryngology)

400 PARNASSUS AVE
SAN FRANCISCO, CA 94143

San Francisco County (415) 476-1000

TIFFANY PONG ROSS PA-C

Physician Assistant

400 PARNASSUS AVE, 3RD FLOOR, SUITE 311
SAN FRANCISCO, CA 94143

San Francisco County (415) 353-2739

SHINTARO TATEBE MSPT

Physical Therapist

400 PARNASSUS AVE, A-68
SAN FRANCISCO, CA 94143

San Francisco County (415) 353-8574

DR. YVONNE W WU MD

Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)

400 PARNASSUS AVE
SAN FRANCISCO, CA 94143

San Francisco County (415) 353-2813

DR. DAVID S. BRADFORD MD

Orthopaedic Surgery

400 PARNASSUS AVE
SAN FRANCISCO, CA 94143

San Francisco County (415) 353-2739

DR. SANG-MO KANG MD

Surgery

400 PARNASSUS AVE
SAN FRANCISCO, CA 94143

San Francisco County (415) 476-1551

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 Ilana Withop's NPI number?

The NPI number for Ilana Withop is 1154374361. It was assigned to this individual provider in the NPPES registry on May 18, 2006.

Where is Ilana Withop located?

Ilana Withop practices at 400 Parnassus Ave, San Francisco, CA 94143. The listed phone number is (415) 353-2771.

What is Ilana Withop's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

When was this NPI record last updated?

The NPPES record for Ilana Withop was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 41 days 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.