MARK GEMENDER
NPI 1639670227
Military Health Care Provider in San Diego, CA

NPI Status: Active since February 28, 2018

Contact Information

2496 BAUER RD
SAN DIEGO, CA
ZIP 92126
Phone: (619) 881-9011

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Military Health Care Provider

About MARK GEMENDER

This page provides the complete NPI Profile along with additional information for Mark Gemender, a provider established in San Diego, California with a medical specialization in Military Health Care Provider. The healthcare provider is registered in the NPI registry with number 1639670227 assigned on February 2018. The practitioner's primary taxonomy code is 171000000X. The provider is registered as an individual and his NPI record was last updated 6 years ago.

NPI: 1639670227
Provider Name: MARK GEMENDER
Gender: Male
Entity Type: Individual
Location Address: 2496 BAUER RD SAN DIEGO, CA 92126
Location Phone: (619) 881-9011
Mailing Address: 2496 BAUER RD SAN DIEGO, CA 92126
Is Sole Proprietor?: No
Enumeration Date: 02-28-2018
Last Update Date: 05-01-2020
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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: Military Health Care Provider
Taxonomy Code: 171000000X
Type: Other Service Providers
Taxonomy Description: Active duty military health care providers not otherwise classified who need to be separately identified for operational, clinical, or administrative processes.

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 1639670227, we treat the final digit (7) 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 63. The final step is to find the difference between that total and the next multiple of ten (70 - 63 = 7).

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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 6

Pos 4

Unchanged

Pos 5

Doubled → 12 → 1 + 2

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 4

Check

Target digit

Regular digit Doubled digit Check digit

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.

1 → 2 3 → 6 6 → 12 → 3 0 → 0 2 → 4

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 6 + 6 + 9 + 1 + 2 + 7 + 0 + 2 + 4 + 24 = 63

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 63 is 70. The difference is the calculated check digit.

70 - 63 = 7

This NPI is valid

The calculated check digit is 7, which matches the last digit of 1639670227.