DR. JOHN ROBERT MASCOLA M.D.
NPI 1083790745
Specialist in Bethesda, MD
NPI Status: Active since October 27, 2006
Contact Information
NATIONAL NAVAL MEDICAL CTR
8901 ROCKVILLE PIKE
BETHESDA, MD
ZIP 20889
Phone: (301) 295-4611
- Individual
- Male
- Specialist
About JOHN MASCOLA
This page provides the complete NPI Profile along with additional information for John Mascola, a provider established in Bethesda, Maryland with a medical specialization in Specialist. The healthcare provider is registered in the NPI registry with number 1083790745 assigned on October 2006. The practitioner's primary taxonomy code is 174400000X with license number G59935 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1083790745
- Provider Name
- DR. JOHN ROBERT MASCOLA M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- NATIONAL NAVAL MEDICAL CTR 8901 ROCKVILLE PIKE BETHESDA, MD 20889
- Location Phone
- (301) 295-4611
- Mailing Address
- VACCINE RESEARCH CENTER NIAID NIH 40 CONVENT DRIVE, MSC 3015 BETHESDA, MD 20892
- Mailing Phone
- (301) 594-8487
- Mailing Fax
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 10-27-2006
- 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
Specialist
- Taxonomy Code
- 174400000X
- Type
- Other Service Providers
- License No.
- G59935
- License State
- CA
- Taxonomy Description
- An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
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 | 171000000X | Other Service Providers | Military Health Care Provider | G59935 (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 1083790745, we treat the final digit (5) 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 5).
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 65 is 70. 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.
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1083790745, enumerated as an "individual" on October 27, 2006.
The provider is located at NATIONAL NAVAL MEDICAL CTR 8901 ROCKVILLE PIKE BETHESDA, MD 20889 and the phone number is (301) 295-4611.
Specialist with taxonomy code 174400000X.
