STEWART COUNSELING SERVICES, L.L.C.
NPI 1598613176
Clinic/Center - Methadone in Angleton, TX

NPI Status: Active since March 19, 2026

Contact Information

1100 E MULBERRY ST STE A
ANGLETON, TX
ZIP 77515
Phone: (979) 313-2973
Fax: (979) 799-8753

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  • Organization
  • Clinic/Center
  • Methadone
  • CLIA Number: 45D2319115
  • CLIA Cert. Type: Comp. Outpatient Rehab Facility
  • CLIA Exp. Date: 02-23-2027

About STEWART COUNSELING SERVICES, L.L.C.

This page provides the complete NPI Profile along with additional information for Stewart Counseling Services, L.l.c., a provider established in Angleton, Texas operating as a Clinic/center, focusing in methadone . The healthcare provider is registered in the NPI registry with number 1598613176 assigned on March 2026. The practitioner's primary taxonomy code is 261QM2800X. The provider is registered as an organization and their NPI record was last updated March 2026. Stewart Counseling Services, L.l.c. 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 Cynthia D Stewart Lcdc (Ceo/program Director)

NPI
1598613176
Provider Name
STEWART COUNSELING SERVICES, L.L.C.
Entity Type
Organization
Location Address
1100 E MULBERRY ST STE A ANGLETON, TX 77515
Location Phone
(979) 313-2973
Location Fax
(979) 799-8753
Mailing Address
1100 E MULBERRY ST STE A ANGLETON, TX 77515
Mailing Phone
(979) 313-2973
Mailing Fax
(979) 799-8753
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
03-19-2026
Last Update Date
03-19-2026
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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

Clinic/Center Methadone

Taxonomy Code
261QM2800X
Type
Ambulatory Health Care Facilities
Taxonomy Description
An entity, facility, or distinct part of a facility providing diagnostic, and replacement maintenance treatment services related to individuals with drug addiction.

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)
1101YA0400XBehavioral Health & Social Service Providers

Counselor
Addiction (Substance Use Disorder)

 
2163W00000XNursing Service Providers

Registered Nurse

 
3164X00000XNursing Service Providers

Licensed Vocational Nurse

 
42083A0300XAllopathic & Osteopathic Physicians

Preventive Medicine
Addiction Medicine

 

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

CYNTHIA D STEWART LCDC

Authorized Official Title
CEO/PROGRAM DIRECTOR
Authorized Official Phone
(979) 313-2973

CLIA Information

The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:

CLIA Number
45D2319115
Facility Type
Comp. Outpatient Rehab Facility
Certificate Effective Date
February 24, 2025
Certificate Expiration Date
February 23, 2027
Laboratory Director
CYNTHIA D. STEWART
Certificate Type
Certificate of Waiver
Certificate Type Description
This CLIA certificate is issued to Stewart Counseling Services, L.l.c. to perform only waived tests. CLIA defines waived tests as simple tests with a low risk for an incorrect result. Waived tests include certain tests listed in CLIA regulations, tests cleared by the FDA for home use and tests approved by the FDA for waived status and that meet CLIA waiver criteria.

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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 1598613176, 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 64. The final step is to find the difference between that total and the next multiple of ten (70 - 64 = 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
5
Unchanged
Pos 3
9
Doubled → 18 → 1 + 8
Pos 4
8
Unchanged
Pos 5
6
Doubled → 12 → 1 + 2
Pos 6
1
Unchanged
Pos 7
3
Doubled → 6
Pos 8
1
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
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 9 → 18 → 9 6 → 12 → 3 3 → 6 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 1 + 8 + 8 + 1 + 2 + 1 + 6 + 1 + 1 + 4 + 24 = 64

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

The next multiple of ten after 64 is 70. The difference is the calculated check digit.

70 - 64 = 6
This NPI is valid
The calculated check digit is 6, which matches the last digit of 1598613176.

Other Providers at the Same Location


The following 1 provider is registered at the same or a nearby location.

Clinic/Center (Methadone)
1100 E MULBERRY ST STE A
ANGLETON, TX 77515

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1598613176, enumerated as an "organization" on March 19, 2026.

The provider is located at 1100 E MULBERRY ST STE A ANGLETON, TX 77515 and the phone number is (979) 313-2973.

Clinic/Center with taxonomy code 261QM2800X and a focus in Methadone.