DR. DAVID JESUS ALCALA PEREZ PH.D.
NPI 1124527486
Psychologist - Counseling in San Juan, PR

NPI Status: Active since February 01, 2018

Contact Information

431 AVE PONCE DE LEON
NACIONAL PLAZA BUILDING SUITE 1501B
SAN JUAN, PR
ZIP 00917
Phone: (787) 717-7005

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  • Individual
  • Male
  • Psychologist
  • Counseling

About DAVID ALCALA PEREZ

This page provides the complete NPI Profile along with additional information for David Alcala Perez, a provider established in San Juan, Puerto Rico with a medical specialization in Psychologist, focusing in counseling . The healthcare provider is registered in the NPI registry with number 1124527486 assigned on February 2018. The practitioner's primary taxonomy code is 103TC1900X with license number 5339 (PR). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1124527486
Provider Name
DR. DAVID JESUS ALCALA PEREZ PH.D.
Gender
Male
Entity Type
Individual
Location Address
431 AVE PONCE DE LEON NACIONAL PLAZA BUILDING SUITE 1501B SAN JUAN, PR 00917
Location Phone
(787) 717-7005
Mailing Address
UU1 CALLE 39 PMB 224 SANTA JUANITA MAIL STATION BAYAMON, PR 00956
Mailing Phone
(787) 717-7005
Is Sole Proprietor?
Yes
Enumeration Date
02-01-2018
Last Update Date
10-08-2025
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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

Psychologist Counseling

Taxonomy Code
103TC1900X
Type
Behavioral Health & Social Service Providers
License No.
5339
License State
PR
Taxonomy Description
A psychologist who specializes in general practice and health service. It focuses on how people function both personally and in their relationships at all ages. Counseling psychology addresses the emotional, social, work, school and physical health concerns people may have at different stages in their lives, focusing on typical life stresses and more severe issues with which people may struggle as individuals and as a part of families, groups and organizations. Counseling psychologists help people with physical, emotional and mental health issues improve their sense of well-being, alleviate feelings of distress and resolve crises. They also provide assessment, diagnosis, and treatment of more severe psychological symptoms.

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)
1103TB0200XBehavioral Health & Social Service Providers

Psychologist
Cognitive & Behavioral

5339 (PR)

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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 1124527486, 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 54. The final step is to find the difference between that total and the next multiple of ten (60 - 54 = 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
1
Doubled → 2
Pos 2
1
Unchanged
Pos 3
2
Doubled → 4
Pos 4
4
Unchanged
Pos 5
5
Doubled → 10 → 1 + 0
Pos 6
2
Unchanged
Pos 7
7
Doubled → 14 → 1 + 4
Pos 8
4
Unchanged
Pos 9
8
Doubled → 16 → 1 + 6
Check
6
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 2 → 4 5 → 10 → 1 7 → 14 → 5 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 4 + 4 + 1 + 0 + 2 + 1 + 4 + 4 + 1 + 6 + 24 = 54

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

The next multiple of ten after 54 is 60. The difference is the calculated check digit.

60 - 54 = 6
This NPI is valid
The calculated check digit is 6, which matches the last digit of 1124527486.

Other Providers at the Same Location


The following 11 providers are registered at the same or a nearby location.

Internal Medicine (Cardiovascular Disease)
431 AVE PONCE DE LEON, SUITE 328
SAN JUAN, PR 00917
Surgery
431 AVE PONCE DE LEON, NATIONAL PLAZA, SUITE 328
SAN JUAN, PR 00917
Internal Medicine (Hematology & Oncology)
431 AVE PONCE DE LEON, NACIONAL PLAZA SUITE 900
SAN JUAN, PR 00917
Pharmacist
431 AVE PONCE DE LEON
HATO REY, PR 00917
Internal Medicine
431 AVE PONCE DE LEON, SUITE 901 EDIF NATIONAL PLAZA
SAN JUAN, PR 00917
Internal Medicine
431 AVE PONCE DE LEON, PISO 2 OFICINA 202
HATO REY, PR 00917
Orthopaedic Surgery
431 AVE PONCE DE LEON, SUITE 326
SAN JUAN, PR 00917
Physical Therapist
431 AVE PONCE DE LEON, SUITE 325
SAN JUAN, PR 00917
Internal Medicine (Hematology & Oncology)
431 AVE PONCE DE LEON, NATIONAL PLAZA SUITE701
SAN JUAN, PR 00917
Internal Medicine (Cardiovascular Disease)
431 AVE PONCE DE LEON, SUITE 301
SAN JUAN, PR 00917
Surgery
431 AVE PONCE DE LEON, NATIONAL PLAZA SUITE 318
SAN JUAN, PR 00917

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1124527486, enumerated as an "individual" on February 01, 2018.

The provider is located at 431 AVE PONCE DE LEON NACIONAL PLAZA BUILDING SUITE 1501B SAN JUAN, PR 00917 and the phone number is (787) 717-7005.

Psychologist with taxonomy code 103TC1900X and a focus in Counseling.