CRYSTAL MARIA RIVERA PEREZ MD
NPI 1770159428
Internal Medicine in Athens, GA

NPI Status: Active since June 02, 2021

Contact Information

1500 OGLETHORPE AVE STE 200C
ATHENS, GA
ZIP 30606
Phone: (706) 389-3875
Fax: (706) 389-3876

Recently Updated NPI Information
Some details in this NPI profile have been updated in the NPI registry within the last 30 days.

Table of Contents

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

Individual
Female
Internal Medicine

About CRYSTAL RIVERA PEREZ

This page provides the complete NPI Profile along with additional information for Crystal Rivera Perez, an internist established in Athens, Georgia with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1770159428 assigned on June 2021. The practitioner's primary taxonomy code is 207R00000X with license number 111826 (GA). The provider is registered as an individual and her NPI record was last updated June 2026. Crystal Rivera Perez operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization.

NPI: 1770159428
Provider Name: CRYSTAL MARIA RIVERA PEREZ MD
Gender: Female
Entity Type: Individual
Location Address: 1500 OGLETHORPE AVE STE 200C ATHENS, GA 30606
Location Phone: (706) 389-3875
Location Fax: (706) 389-3876
Mailing Address: PO BOX 48089 ATHENS, GA 30604
Mailing Phone: (706) 389-3740
Mailing Fax: (706) 389-3876
Is Sole Proprietor?: Yes
Enumeration Date: 06-02-2021
Last Update Date: 06-26-2026
Code Navigator

An internist like Crystal Rivera Perez is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.

Location Map

Secondary Locations

100 Ave Laurel
Bayamon, PR 00956
(787) 678-6571

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: Internal Medicine
Taxonomy Code: 207R00000X
Type: Allopathic & Osteopathic Physicians
License No.: 111826
License State: GA
Taxonomy Description: A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Group Taxonomy 193200000X MULTI-SPECIALTY GROUP

This provider is a business group of one or more individual practitioners, who practice with different areas of specialization.

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 1770159428, we treat the final digit (8) 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).

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 → 14 → 1 + 4

Pos 4

Unchanged

Pos 5

Doubled → 2

Pos 6

Unchanged

Pos 7

Doubled → 18 → 1 + 8

Pos 8

Unchanged

Pos 9

Doubled → 4

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 7 → 14 → 5 1 → 2 9 → 18 → 9 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 1 + 4 + 0 + 2 + 5 + 1 + 8 + 4 + 4 + 24 = 62

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

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8

This NPI is valid

The calculated check digit is 8, which matches the last digit of 1770159428.