DR. MARK JOHN KELLY MD
NPI 1538002886
Psychiatry & Neurology - Neurology in Jacksonville, FL

NPI Status: Active since April 13, 2026

Contact Information

4500 SAN PABLO RD S
JACKSONVILLE, FL
ZIP 32224
Phone: (904) 953-2000

Recently Updated NPI Information
Some details in this NPI profile have been updated in the NPI registry within the last 30 days.

Table of Contents

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

Individual
Male
Psychiatry & Neurology
Neurology

About MARK KELLY

This page provides the complete NPI Profile along with additional information for Mark Kelly, a provider established in Jacksonville, Florida with a medical specialization in Psychiatry & Neurology, focusing in neurology . The healthcare provider is registered in the NPI registry with number 1538002886 assigned on April 2026. The practitioner's primary taxonomy code is 2084N0400X with license number ME178838 (FL). The provider is registered as an individual and his NPI record was last updated May 2026.

NPI: 1538002886
Provider Name: DR. MARK JOHN KELLY MD
Gender: Male
Entity Type: Individual
Location Address: 4500 SAN PABLO RD S JACKSONVILLE, FL 32224
Location Phone: (904) 953-2000
Mailing Address: PO BOX 860912 MINNEAPOLIS, MN 55486
Is Sole Proprietor?: No
Enumeration Date: 04-13-2026
Last Update Date: 05-19-2026
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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: Psychiatry & Neurology Neurology
Taxonomy Code: 2084N0400X
Type: Allopathic & Osteopathic Physicians
License No.: ME178838
License State: FL
Taxonomy Description: A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.

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 1538002886, we treat the final digit (6) 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 64. The final step is to find the difference between that total and the next multiple of ten (70 - 64 = 6).

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 → 0

Pos 6

Unchanged

Pos 7

Doubled → 4

Pos 8

Unchanged

Pos 9

Doubled → 16 → 1 + 6

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 0 → 0 2 → 4 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 6 + 8 + 0 + 0 + 4 + 8 + 1 + 6 + 24 = 64

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

The next multiple of ten after 64 is 70. The difference is the calculated check digit.

70 - 64 = 6

This NPI is valid

The calculated check digit is 6, which matches the last digit of 1538002886.