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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

MR. MARSHALL FRANCIS SINBACK JR. PA-C
NPI 1174523393
Physician Assistant - Surgical in Martinsburg, WV

Active since July 29, 2005
510 BUTLER AVE, MARTINSBURG VA MEDICAL CENTER, MARTINSBURG, WV 25401(304) 263-0811(304) 262-1397 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

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

About Mr. Marshall Francis Sinback Jr. Pa-c NPPES

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

MR. MARSHALL FRANCIS SINBACK JR. PA-C (NPI 1174523393) is an individual surgical provider in Martinsburg, West Virginia, licensed in Virginia (0110002091) and active in the NPI registry since July 2005.

NPPES Registry Identity

NPI1174523393
Entity TypeIndividualMale
Primary Taxonomy363AS0400X
Provider Legal NameMR. MARSHALL FRANCIS SINBACK JR.Credential: PA-C
Location Address510 BUTLER AVE, MARTINSBURG VA MEDICAL CENTERMartinsburg, WV 25401-9990
Mailing Address3029 Saratoga DrWinchester, VA 22601-2697 · (540) 678-3808
Phone(304) 263-0811
Fax(304) 262-1397
Sole ProprietorNo
Enumeration DateJuly 29, 2005
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1174523393 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician Assistant · SurgicalPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363AS0400X
Licenses✔ Licensed in VA · 0110002091✔ Licensed in MA · 1346
Also ListedPhysician AssistantTaxonomy 363A00000X · License 0110002091 (VA), 1346 (MA)
510 BUTLER AVE, Martinsburg, WV 25401
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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.

JEANEASE LESLIE LMSW
Social Worker
510 BUTLER AVE
MARTINSBURG, WV 25401
Berkeley County (304) 263-0811
DR. MARSHA A MILLS PH.D.
Psychologist (Clinical)
510 BUTLER AVE, MENTAL HEALTH SERVICE
MARTINSBURG, WV 25401
Berkeley County (304) 263-0811
MS. BETH ANN ZNANIECKI PA-C
Physician Assistant (Medical)
510 BUTLER AVE, MARTINSBURG VETERANS ADMINISTRATION MEDICAL CENTER
MARTINSBURG, WV 25401
Berkeley County (304) 263-0811
ANGELA J HOFFMAN MSW
Social Worker (Clinical)
510 BUTLER AVE
MARTINSBURG, WV 25401
Berkeley County (304) 263-0811
DR. SUSILA RAJAKUMAR M.D.
Internal Medicine
510 BUTLER AVE
MARTINSBURG, WV 25401
Berkeley County (304) 263-0811
MS. LAURA MICHELE IRWIN R.PH,PHARM.D, CPS
Pharmacist (Pharmacotherapy)
510 BUTLER AVE
MARTINSBURG, WV 25401
Berkeley County (304) 263-0741
ANNEMARIE SULLIVAN PRICE RD
Dietitian, Registered
510 BUTLER AVE
MARTINSBURG, WV 25401
Berkeley County (304) 263-0811
VAMC MARTINSBURG
Social Worker (Clinical)
510 BUTLER AVE
MARTINSBURG, WV 25401
Berkeley County (304) 263-0811

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 Marshall Sinback's NPI number?

The NPI number for Marshall Sinback is 1174523393. It was assigned to this individual provider in the NPPES registry on July 29, 2005.

Where is Marshall Sinback located?

Marshall Sinback practices at 510 Butler Ave Martinsburg VA Medical Center, Martinsburg, WV 25401. The listed phone number is (304) 263-0811.

What is Marshall Sinback's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Surgical, with taxonomy code 363AS0400X.

When was this NPI record last updated?

The NPPES record for Marshall Sinback was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.