MARISSA PEREZ
NPI 1093849085
Speech-Language Pathologist in San Antonio, TX

NPI Status: Active since March 14, 2007

Contact Information

4647 MEDICAL DR
SAN ANTONIO, TX
ZIP 78229
Phone: (210) 358-2710

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

Individual
Female
Speech-Language Pathologist
CLIA Number: 45D0995749
CLIA Cert. Type: Physician Office
CLIA Exp. Date: 12-04-2026

About MARISSA PEREZ

This page provides the complete NPI Profile along with additional information for Marissa Perez, a provider established in San Antonio, Texas with a medical specialization in Speech-language Pathologist. The healthcare provider is registered in the NPI registry with number 1093849085 assigned on March 2007. The practitioner's primary taxonomy code is 235Z00000X with license number 103150 (TX). The provider is registered as an individual and her NPI record was last updated 11 years ago.

NPI: 1093849085
Provider Name: MARISSA PEREZ
Gender: Female
Entity Type: Individual
Location Address: 4647 MEDICAL DR SAN ANTONIO, TX 78229
Location Phone: (210) 358-2710
Mailing Address: 2617 W SUMMIT AVE SAN ANTONIO, TX 78228
Is Sole Proprietor?: No
Enumeration Date: 03-14-2007
Last Update Date: 02-24-2015
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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: Speech-Language Pathologist
Taxonomy Code: 235Z00000X
Type: Speech, Language and Hearing Service Providers
License No.: 103150
License State: TX
Taxonomy Description: The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.

CLIA Information

The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:

CLIA Number: 45D0995749
Facility Type: Physician Office
Certificate Effective Date: December 05, 2024
Certificate Expiration Date: December 04, 2026
Laboratory Director: MARISSA N. LARGOZA MD
Certificate Type: Certificate for Provider-Performed Microscopy Procedures (PPMP)
Certificate Type Description: This CLIA certificate is issued to Marissa Perez in which a physician, midlevel practitioner or dentist that performs specific microscopy procedures during the course of a patient's visit. A limited list of provider-performed microscopy procedures is included under this certificate type, which are categorized as moderate complexity testing.

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 1093849085, 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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 18 → 1 + 8

Pos 4

Unchanged

Pos 5

Doubled → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 18 → 1 + 8

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 9 → 18 → 9 8 → 16 → 7 9 → 18 → 9 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 1 + 8 + 3 + 1 + 6 + 4 + 1 + 8 + 0 + 1 + 6 + 24 = 65

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.

70 - 65 = 5

This NPI is valid

The calculated check digit is 5, which matches the last digit of 1093849085.