ADVANCED SOUTHERN GASTROENTEROLOGY PLLC
NPI 1881534501
Internal Medicine - Gastroenterology in Corpus Christi, TX

NPI Status: Active since March 31, 2026

Contact Information

535 GORDON ST
CORPUS CHRISTI, TX
ZIP 78404
Phone: (630) 995-9290

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  • Organization
  • Internal Medicine
  • Gastroenterology

About ADVANCED SOUTHERN GASTROENTEROLOGY PLLC

This page provides the complete NPI Profile along with additional information for Advanced Southern Gastroenterology Pllc, an internist established in Corpus Christi, Texas operating as a Internal Medicine, focusing in gastroenterology . The healthcare provider is registered in the NPI registry with number 1881534501 assigned on March 2026. The practitioner's primary taxonomy code is 207RG0100X. The provider is registered as an organization and their NPI record was last updated May 2026. Advanced Southern Gastroenterology Pllc operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization. The authorized official of this NPI record is Mr. Amir R Ahmed Md (President)

NPI
1881534501
Provider Name
ADVANCED SOUTHERN GASTROENTEROLOGY PLLC
Entity Type
Organization
Location Address
535 GORDON ST CORPUS CHRISTI, TX 78404
Location Phone
(630) 995-9290
Mailing Address
27211 ASHFORD SKY LN KATY, TX 77494
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
03-31-2026
Last Update Date
05-18-2026
Code Navigator

An internist like Advanced Southern Gastroenterology Pllc 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

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 Gastroenterology

Taxonomy Code
207RG0100X
Type
Allopathic & Osteopathic Physicians
Taxonomy Description
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal 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.

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name

MR. AMIR R AHMED MD

Authorized Official Title
PRESIDENT
Authorized Official Phone
(630) 995-9290

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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 1881534501, we treat the final digit (1) 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 1).

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
8
Doubled → 16 → 1 + 6
Pos 4
1
Unchanged
Pos 5
5
Doubled → 10 → 1 + 0
Pos 6
3
Unchanged
Pos 7
4
Doubled → 8
Pos 8
5
Unchanged
Pos 9
0
Doubled → 0
Check
1
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 8 → 16 → 7 5 → 10 → 1 4 → 8 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 1 + 6 + 1 + 1 + 0 + 3 + 8 + 5 + 0 + 24 = 59

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

The next multiple of ten after 59 is 60. The difference is the calculated check digit.

60 - 59 = 1
This NPI is valid
The calculated check digit is 1, which matches the last digit of 1881534501.

Other Providers at the Same Location


The following 2 providers are registered at the same or a nearby location.

Dentist (General Practice)
535 GORDON ST
CORPUS CHRISTI, TX 78404
Dental Hygienist
535 GORDON ST
CORPUS CHRISTI, TX 78404

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1881534501, enumerated as an "organization" on March 31, 2026.

The provider is located at 535 GORDON ST CORPUS CHRISTI, TX 78404 and the phone number is (630) 995-9290.

Internal Medicine with taxonomy code 207RG0100X and a focus in Gastroenterology.