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JAMES ROY VASSER M.D.
NPI 1417085960
Pathology - Cytopathology in Vallejo, CA

Active since February 28, 2007
300 HOSPITAL DR, DEPARTMENT OF PATHOLOGY, VALLEJO, CA 94589(707) 554-5331(707) 642-1095 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About James Roy Vasser M.d. NPPES

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

JAMES ROY VASSER M.D. (NPI 1417085960) is an individual cytopathology provider in Vallejo, California, licensed in California (A42628) and active in the NPI registry since February 2007.

NPPES Registry Identity

NPI1417085960
Entity TypeIndividualMale
Primary Taxonomy207ZC0500X
Provider Legal NameJAMES ROY VASSERCredential: M.D.
Location Address300 HOSPITAL DR, DEPARTMENT OF PATHOLOGYVallejo, CA 94589-2574
Mailing Address300 Hospital Drive, Department Of PathologyVallejo, CA 94589 · (707) 554-5331 · Fax (707) 642-1095
Phone(707) 554-5331
Fax(707) 642-1095
Sole ProprietorNo
Enumeration DateFebruary 28, 2007
Last NPPES UpdateSeptember 11, 2025
✔ NPI 1417085960 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPathology · CytopathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZC0500X
License✔ Licensed in CA · A42628
Definition
A cytopathologist is an anatomic pathologist trained in the diagnosis of human disease by means of the study of cells obtained from body secretions and fluids, by scraping, washing, or sponging the surface of a lesion, or by the aspiration of a tumor mass or body organ with a fine needle. A major aspect of a cytopathologist's practice is the interpretation of Papanicolaou-stained smears of cells from the female reproductive systems, the Pap test. However, the cytopathologist's expertise is applied to the diagnosis of cells from all systems and areas of the body. He/she is a consultant to all medical specialists.
Also ListedPathology · Anatomic Pathology & Clinical PathologyTaxonomy 207ZP0102X · License A42628 (CA)
300 HOSPITAL DR, Vallejo, CA 94589
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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.

SHIRLEY HOVIS CRNA
Registered Nurse
300 HOSPITAL DR, SUTTER SOLANO MEDICAL CENTER
VALLEJO, CA 94589
Napa County (707) 554-5226
HIEU MINH PHAN PHARMD
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
300 HOSPITAL DR
VALLEJO, CA 94589
Napa County (707) 554-5050
MORGAN HILL EMERGENCY MEDICAL GROUP
Emergency Medicine
300 HOSPITAL DR
VALLEJO, CA 94589
Napa County (707) 554-4444
JAMES R. KRASNO, M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
300 HOSPITAL DR
VALLEJO, CA 94589
Napa County (707) 554-5331
JULIO S ESPINOSA JR. CRNA
Registered Nurse
300 HOSPITAL DR, SUTTER SOLANO MEDICAL CENTER
VALLEJO, CA 94589
Napa County (707) 554-5726
BAY IMAGING CONSULTANTS MEDICAL GROUP INC
Radiology (Diagnostic Radiology)
300 HOSPITAL DR
VALLEJO, CA 94589
Napa County (925) 296-7156
ANTONY MATHEW M.D.
Emergency Medicine
300 HOSPITAL DR
VALLEJO, CA 94589
Napa County (925) 225-5837
DANIELLE L. FISHER PA-C
Emergency Medicine
300 HOSPITAL DR, SUTTER SOLANO MEDICAL CENTER
VALLEJO, CA 94589
Napa County (707) 554-4444

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 James Vasser's NPI number?

The NPI number for James Vasser is 1417085960. It was assigned to this individual provider in the NPPES registry on February 28, 2007.

Where is James Vasser located?

James Vasser practices at 300 Hospital Dr Department Of Pathology, Vallejo, CA 94589. The listed phone number is (707) 554-5331.

What is James Vasser's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Cytopathology, with taxonomy code 207ZC0500X.

When was this NPI record last updated?

The NPPES record for James Vasser was last updated on September 11, 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.