THE 21 CLUB OF CNY INC
NPI 1477410090
Clinical Medical Laboratory in Houston, TX

NPI Status: Active since January 06, 2026

Contact Information

12828 WILLOW CENTRE DR STE D
HOUSTON, TX
ZIP 77066
Phone: (713) 766-2796
Fax: (712) 219-5827

NPI Profile Information
Primary Taxonomy
Authorized Official
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Organization
Clinical Medical Laboratory

About THE 21 CLUB OF CNY INC

This page provides the complete NPI Profile along with additional information for The 21 Club Of Cny Inc, a provider established in Houston, Texas operating as a Clinical Medical Laboratory. The healthcare provider is registered in the NPI registry with number 1477410090 assigned on January 2026. The practitioner's primary taxonomy code is 291U00000X. The provider is registered as an organization and their NPI record was last updated February 2026. The authorized official of this NPI record is Carolyn Waldron (Owner)

NPI: 1477410090
Provider Name: THE 21 CLUB OF CNY INC
Entity Type: Organization
Location Address: 12828 WILLOW CENTRE DR STE D HOUSTON, TX 77066
Location Phone: (713) 766-2796
Location Fax: (712) 219-5827
Mailing Address: 12828 WILLOW CENTRE DR STE D HOUSTON, TX 77066
Mailing Phone: (713) 766-2796
Mailing Fax: (712) 219-5827
Is Sole Proprietor?: No
Is Organization Subpart?: No
Enumeration Date: 01-06-2026
Last Update Date: 02-13-2026
Code Navigator

Establishments like The 21 Club Of Cny Inc are healthcare facilities that may perform a wide range of laboratory procedures, assisted by doctors and medical technologists. Laboratories can be categorized according to their function as common diagnostic labs or specialty labs that conduct specialized or confirmatory tests. Different clinical laboratories could specialize in clinical chemistry, clinical microbiology, hematology, serology, clinical microscopy, cytopathology, molecular biology, or public health. Please inquire directly with this provider to confirm their test menu.

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: Clinical Medical Laboratory
Taxonomy Code: 291U00000X
Type: Laboratories
Taxonomy Description: (1) A clinical laboratory is a facility for the biological, microbiological, serological, chemical, immunohematological, hematological, biophysical, cytological, pathological, or other examination of materials derived from the human body for the purpose of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, human beings. These examinations also include procedures to determine, measure, or otherwise describe the presence or absence of various substances or organisms in the body. Facilities only collecting or preparing specimens (or both) or only serving as a mailing service and not performing testing are not considered clinical laboratories. (2) Any facility that examines materials from the human body for purposes of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, or the assessment of, the health of human beings. Typical divisions of a clinical laboratory include hematology, cytology, bacteriology, histology, biochemistry, medical toxicology, and serology.

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: CAROLYN WALDRON
Authorized Official Title: OWNER
Authorized Official Phone: (713) 766-2796

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 1477410090, we treat the final digit (0) 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 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).

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 → 8

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 18 → 1 + 8

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 4 → 8 0 → 0 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 1 + 4 + 7 + 8 + 1 + 0 + 0 + 1 + 8 + 24 = 60

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

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

60 - 60 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1477410090.