ALEXA CHRISTINE RADTKE LPC
NPI 1871449264
Counselor - Mental Health in Philadelphia, PA

NPI Status: Active since March 09, 2026

Contact Information

850 N 11TH ST
PHILADELPHIA, PA
ZIP 19123
Phone: (215) 769-1100

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  • Individual
  • Female
  • Counselor
  • Mental Health

About ALEXA RADTKE

This page provides the complete NPI Profile along with additional information for Alexa Radtke, a provider established in Philadelphia, Pennsylvania with a medical specialization in Counselor, focusing in mental health . The healthcare provider is registered in the NPI registry with number 1871449264 assigned on March 2026. The practitioner's primary taxonomy code is 101YM0800X with license number PC015503 (PA). The provider is registered as an individual and her NPI record was last updated March 2026.

NPI
1871449264
Provider Name
ALEXA CHRISTINE RADTKE LPC
Gender
Female
Entity Type
Individual
Location Address
850 N 11TH ST PHILADELPHIA, PA 19123
Location Phone
(215) 769-1100
Mailing Address
704 WOLCOTT DR APT D PHILADELPHIA, PA 19118
Is Sole Proprietor?
Yes
Enumeration Date
03-09-2026
Last Update Date
03-09-2026
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A mental health counselor like Alexa Radtke provides treatment to individuals, families, couples, and groups for mental and emotional health issues and relationship problems. Mental health counselors treat clients with a variety of conditions, including anxiety, depression, grief, low self-esteem, stress, and suicidal impulses.

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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

Counselor Mental Health

Taxonomy Code
101YM0800X
Type
Behavioral Health & Social Service Providers
License No.
PC015503
License State
PA

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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 1871449264, we treat the final digit (4) 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 66. The final step is to find the difference between that total and the next multiple of ten (70 - 66 = 4).

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
1
Doubled → 2
Pos 2
8
Unchanged
Pos 3
7
Doubled → 14 → 1 + 4
Pos 4
1
Unchanged
Pos 5
4
Doubled → 8
Pos 6
4
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
2
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
Check
4
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 7 → 14 → 5 4 → 8 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 + 8 + 1 + 4 + 1 + 8 + 4 + 1 + 8 + 2 + 1 + 2 + 24 = 66

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

The next multiple of ten after 66 is 70. The difference is the calculated check digit.

70 - 66 = 4
This NPI is valid
The calculated check digit is 4, which matches the last digit of 1871449264.

Other Providers at the Same Location


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

Nurse Practitioner
850 N 11TH ST
PHILADELPHIA, PA 19123
Nurse Practitioner (Community Health)
850 N 11TH ST
PHILADELPHIA, PA 19123
Dentist
850 N 11TH ST
PHILADELPHIA, PA 19123
Psychologist (Clinical)
850 N 11TH ST
PHILADELPHIA, PA 19123
Counselor (Professional)
850 N 11TH ST
PHILADELPHIA, PA 19123
Psychologist (Clinical Child & Adolescent)
850 N 11TH ST
PHILADELPHIA, PA 19123
Physical Therapist (Orthopedic)
850 N 11TH ST
PHILADELPHIA, PA 19123
Physical Therapist (Cardiopulmonary)
850 N 11TH ST
PHILADELPHIA, PA 19123
Nurse Practitioner
850 N 11TH ST
PHILADELPHIA, PA 19123
Psychologist
850 N 11TH ST
PHILADELPHIA, PA 19123
Clinic/Center
850 N 11TH ST
PHILADELPHIA, PA 19123
Dentist (General Practice)
850 N 11TH ST, DREXEL DENTAL
PHILADELPHIA, PA 19123
Social Worker (Clinical)
850 N 11TH ST
PHILADELPHIA, PA 19123
Nurse Practitioner (Family)
850 N 11TH ST
PHILADELPHIA, PA 19123
Registered Nurse
850 N 11TH ST
PHILADELPHIA, PA 19123
Registered Nurse
850 N 11TH ST
PHILADELPHIA, PA 19123
Social Worker (Clinical)
850 N 11TH ST
PHILADELPHIA, PA 19123
Registered Nurse
850 N 11TH ST
PHILADELPHIA, PA 19123
Psychologist (Clinical Child & Adolescent)
850 N 11TH ST
PHILADELPHIA, PA 19123
Counselor (Professional)
850 N 11TH ST, STEPHEN & SANDRA SHELLER 11TH STREET FAMILY HEALTH SERV
PHILADELPHIA, PA 19123

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1871449264, enumerated as an "individual" on March 09, 2026.

The provider is located at 850 N 11TH ST PHILADELPHIA, PA 19123 and the phone number is (215) 769-1100.

Counselor with taxonomy code 101YM0800X and a focus in Mental Health.