DR. MARY KATHERINE LISZKA DPT
NPI 1336070812
Physical Therapist - Pediatrics in Philadelphia, PA

NPI Status: Active since May 26, 2026

Contact Information

2473 GRANT AVE
PHILADELPHIA, PA
ZIP 19114
Phone: (445) 300-7220

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Newly Listed Provider
This NPI profile has been added to 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
Female
Physical Therapist
Pediatrics

About MARY LISZKA

This page provides the complete NPI Profile along with additional information for Mary Liszka, a provider established in Philadelphia, Pennsylvania with a medical specialization in Physical Therapist, focusing in pediatrics . The healthcare provider is registered in the NPI registry with number 1336070812 assigned on May 2026. The practitioner's primary taxonomy code is 2251P0200X with license number PT034173 (PA). The provider is registered as an individual and her NPI record was last updated May 2026.

NPI: 1336070812
Provider Name: DR. MARY KATHERINE LISZKA DPT
Gender: Female
Entity Type: Individual
Location Address: 2473 GRANT AVE PHILADELPHIA, PA 19114
Location Phone: (445) 300-7220
Mailing Address: 2473 GRANT AVE PHILADELPHIA, PA 19114
Mailing Phone: (445) 300-7220
Is Sole Proprietor?: No
Enumeration Date: 05-26-2026
Last Update Date: 05-26-2026
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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: Physical Therapist Pediatrics
Taxonomy Code: 2251P0200X
Type: Respiratory, Developmental, Rehabilitative and Restorative Service Providers
License No.: PT034173
License State: PA
Taxonomy Description: A licensed physical therapist, including but not limited to an individual who is a Board Certified Specialist in Pediatric Physical Therapy, who has demonstrated specialized knowledge and skill in anatomy, histology, including embryonic development, genetics, biomechanics, neurological function, neuroscience, and pathology, behavioral sciences, and understanding of diseases or conditions that necessitate physical therapy care, that affect systems that in turn necessitate physical therapy care (comorbidities), and that influence the type of intervention that can be given.

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 1336070812, we treat the final digit (2) 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 58. The final step is to find the difference between that total and the next multiple of ten (60 - 58 = 2).

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 → 0

Pos 8

Unchanged

Pos 9

Doubled → 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 3 → 6 0 → 0 0 → 0 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 3 + 6 + 6 + 0 + 7 + 0 + 8 + 2 + 24 = 58

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

The next multiple of ten after 58 is 60. The difference is the calculated check digit.

60 - 58 = 2

This NPI is valid

The calculated check digit is 2, which matches the last digit of 1336070812.