JAMES ROY VASSER M.D.
NPI 1417085960
Pathology - Cytopathology in Vallejo, CA
NPI Status: Active since February 28, 2007
Contact Information
300 HOSPITAL DR
DEPARTMENT OF PATHOLOGY
VALLEJO, CA
ZIP 94589
Phone: (707) 554-5331
Fax: (707) 642-1095
- Individual
- Male
- Pathology
- Cytopathology
About JAMES VASSER
This page provides the complete NPI Profile along with additional information for James Vasser, a provider established in Vallejo, California with a medical specialization in Pathology, focusing in cytopathology . The healthcare provider is registered in the NPI registry with number 1417085960 assigned on February 2007. The practitioner's primary taxonomy code is 207ZC0500X with license number A42628 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1417085960
- Provider Name
- JAMES ROY VASSER M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 300 HOSPITAL DR DEPARTMENT OF PATHOLOGY VALLEJO, CA 94589
- Location Phone
- (707) 554-5331
- Location Fax
- (707) 642-1095
- Mailing Address
- 300 HOSPITAL DRIVE DEPARTMENT OF PATHOLOGY VALLEJO, CA 94589
- Mailing Phone
- (707) 554-5331
- Mailing Fax
- (707) 642-1095
- Is Sole Proprietor?
- No
- Enumeration Date
- 02-28-2007
- Last Update Date
- 09-11-2025
- Code Navigator
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Pathology Cytopathology
- Taxonomy Code
- 207ZC0500X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- A42628
- License State
- CA
- Taxonomy Description
- 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.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 207ZP0102X | Allopathic & Osteopathic Physicians | Pathology | A42628 (CA) |
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1417085960, we treat the final digit (0) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 60 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
VALLEJO, CA 94589
VALLEJO, CA 94589
VALLEJO, CA 94589
VALLEJO, CA 94589
VALLEJO, CA 94589
VALLEJO, CA 94589
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1417085960, enumerated as an "individual" on February 28, 2007.
The provider is located at 300 HOSPITAL DR DEPARTMENT OF PATHOLOGY VALLEJO, CA 94589 and the phone number is (707) 554-5331.
Pathology with taxonomy code 207ZC0500X and a focus in Cytopathology.
