DR. H. MICHAEL ROARK M.D.
NPI 1104989169
Specialist in La Jolla, CA

NPI Status: Active since December 19, 2006

Contact Information

9850 GENESEE AVE
SUITE 130
LA JOLLA, CA
ZIP 92037
Phone: (858) 452-1981

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

Individual
Male
Specialist

About H. ROARK

This page provides the complete NPI Profile along with additional information for H. Roark, a provider established in La Jolla, California with a medical specialization in Specialist. The healthcare provider is registered in the NPI registry with number 1104989169 assigned on December 2006. The practitioner's primary taxonomy code is 174400000X with license number A39651 (CA). The provider is registered as an individual and his NPI record was last updated 7 years ago.

NPI: 1104989169
Provider Name: DR. H. MICHAEL ROARK M.D.
Gender: Male
Entity Type: Individual
Location Address: 9850 GENESEE AVE SUITE 130 LA JOLLA, CA 92037
Location Phone: (858) 452-1981
Mailing Address: 4104 PALISADES RD SAN DIEGO, CA 92116
Is Sole Proprietor?: Yes
Enumeration Date: 12-19-2006
Last Update Date: 12-31-2018
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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: Specialist
Taxonomy Code: 174400000X
Type: Other Service Providers
License No.: A39651
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.

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 1104989169, we treat the final digit (9) 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 61. The final step is to find the difference between that total and the next multiple of ten (70 - 61 = 9).

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 → 0

Pos 4

Unchanged

Pos 5

Doubled → 18 → 1 + 8

Pos 6

Unchanged

Pos 7

Doubled → 18 → 1 + 8

Pos 8

Unchanged

Pos 9

Doubled → 12 → 1 + 2

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 0 → 0 9 → 18 → 9 9 → 18 → 9 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 0 + 4 + 1 + 8 + 8 + 1 + 8 + 1 + 1 + 2 + 24 = 61

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

The next multiple of ten after 61 is 70. The difference is the calculated check digit.

70 - 61 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1104989169.

Other Providers at the Same Location

The following 20 providers are registered at the same or a nearby location.

FRANK EDWARD MAYER M.D.

Internal Medicine (Gastroenterology)

9850 GENESEE AVE, STE 930
LA JOLLA, CA 92037

San Diego County (858) 457-3737

SCOT A BREWSTER MD

Thoracic Surgery (Cardiothoracic Vascular Surgery)