MARCUS GRAHAM ALEGRIA DPM
NPI 1992507537
Podiatrist - Foot & Ankle Surgery in Jacksonville, FL

NPI Status: Active since March 25, 2025

Contact Information

655 W 8TH ST # C126
JACKSONVILLE, FL
ZIP 32209
Phone: (904) 383-1010
Fax: (904) 244-2358

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

Individual
Male
Podiatrist
Foot & Ankle Surgery

About MARCUS ALEGRIA

This page provides the complete NPI Profile along with additional information for Marcus Alegria, a provider established in Jacksonville, Florida with a medical specialization in Podiatrist, focusing in foot & ankle surgery . The healthcare provider is registered in the NPI registry with number 1992507537 assigned on March 2025. The practitioner's primary taxonomy code is 213ES0103X with license number PR894 (FL). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1992507537
Provider Name: MARCUS GRAHAM ALEGRIA DPM
Gender: Male
Entity Type: Individual
Location Address: 655 W 8TH ST # C126 JACKSONVILLE, FL 32209
Location Phone: (904) 383-1010
Location Fax: (904) 244-2358
Mailing Address: 655 W 8TH ST # C126 JACKSONVILLE, FL 32209
Mailing Phone: (904) 383-1010
Mailing Fax: (904) 244-2358
Is Sole Proprietor?: No
Enumeration Date: 03-25-2025
Last Update Date: 06-27-2025
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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: Podiatrist Foot & Ankle Surgery
Taxonomy Code: 213ES0103X
Type: Podiatric Medicine & Surgery Service Providers
License No.: PR894
License State: FL

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	390200000X	Student, Health Care	Student in an Organized Health Care Education/Training Program

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 1992507537, 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 → 18 → 1 + 8

Pos 4

Unchanged

Pos 5

Doubled → 10 → 1 + 0

Pos 6

Unchanged

Pos 7

Doubled → 14 → 1 + 4

Pos 8

Unchanged

Pos 9

Doubled → 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 9 → 18 → 9 5 → 10 → 1 7 → 14 → 5 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 1 + 8 + 2 + 1 + 0 + 0 + 1 + 4 + 5 + 6 + 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 1992507537.