SANDRA MARY WARREN PA-C
NPI 1578890646
Physician Assistant - Medical in Owings Mills, MD

Q: What is Sandra Warren's NPI number?

The NPI number for Sandra Warren is 1578890646. It was assigned to this individual provider in the NPPES registry on November 11, 2009. The provider is also known as Sandra Mary Zellhofer PA.

Q: What is Sandra Warren's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

Q: When was this NPI record last updated?

The NPPES record for Sandra Warren was last updated on October 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.

Active since November 11, 2009

9199 REISTERSTOWN RD STE 203B, OWINGS MILLS, MD 21117(410) 441-3922(410) 441-3923 Get Directions Write a Review

NPPES record last updated: October 6, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Oct 6, 2025, Jul 30, 2021, Dec 15, 2020 and 1 more (4 updates tracked since 2017).

On this page

About Sandra Mary Warren Pa-c NPPES

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

SANDRA MARY WARREN PA-C (NPI 1578890646) is an individual medical provider in Owings Mills, Maryland, licensed in Maryland (C0004198) and active in the NPI registry since November 2009.

NPPES Registry Identity

NPI1578890646

Entity TypeIndividualFemale

Primary Taxonomy363AM0700X

Provider Legal NameSANDRA MARY WARRENCredential: PA-C

Location Address9199 REISTERSTOWN RD STE 203BOwings Mills, MD 21117-4593

Mailing Address9199 Reisterstown Rd Ste 203bOwings Mills, MD 21117-4593 · (410) 441-3922 · Fax (410) 441-3923

Phone(410) 441-3922

Fax(410) 441-3923

Sole ProprietorNo

Enumeration DateNovember 11, 2009

Last NPPES UpdateOctober 6, 20254 updates tracked since enumeration

NPPES CertifiedOctober 6, 2025

✔ NPI 1578890646 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician Assistant · MedicalPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363AM0700X

License✔ Licensed in MD · C0004198

9199 REISTERSTOWN RD STE 203B, Owings Mills, MD 21117

Open in Google Maps ↗

Other Names 1

Former Name (1)Sandra Mary Zellhofer Pa

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 Sandra Warren's NPI number?

The NPI number for Sandra Warren is 1578890646. It was assigned to this individual provider in the NPPES registry on November 11, 2009. The provider is also known as Sandra Mary Zellhofer PA.

Where is Sandra Warren located?

Sandra Warren practices at 9199 Reisterstown Rd Ste 203B, Owings Mills, MD 21117. The listed phone number is (410) 441-3922.

What is Sandra Warren's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

When was this NPI record last updated?

The NPPES record for Sandra Warren was last updated on October 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.