Cynthia Stewart
Cynthia Stewart is a provider specialising in Methadone Clinic in Angleton, TX, registered under NPI 1851240105. This provider registers 5 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 1100 E MULBERRY ST STE A, Angleton, TX 77515. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| TX-10312-M | TX | Methadone Clinic primary |
| 9887 | TX | Addiction (Substance Use Disorder)… |
| 6906 | TX | Addiction (Substance Use Disorder)… |
| 13952 | TX | Addiction (Substance Use Disorder)… |
| 524811 | TX | Registered Nurse |
| 220337 | TX | Licensed Vocational Nurse |
| 223463 | TX | Licensed Vocational Nurse |
| F2586 | TX | Addiction Medicine (Preventive Medicine)… |
This provider holds licence TX-10312-M issued in TX. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Methadone covers
An entity, facility, or distinct part of a facility providing diagnostic, and replacement maintenance treatment services related to individuals with drug addiction. NUCC Health Care Provider Taxonomy, code 261QM2800X
All registered taxonomy codes
This provider registers 8 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 261QM2800X | Methadone Clinic Methadone | TX-10312-M | TX | primary |
| 101YA0400X | Addiction (Substance Use Disorder) Counselor Addiction (Substance Use Disorder) | 9887 | TX | |
| 101YA0400X | Addiction (Substance Use Disorder) Counselor Addiction (Substance Use Disorder) | 6906 | TX | |
| 101YA0400X | Addiction (Substance Use Disorder) Counselor Addiction (Substance Use Disorder) | 13952 | TX | |
| 163W00000X | Registered Nurse | 524811 | TX | |
| 164X00000X | Licensed Vocational Nurse | 220337 | TX | |
| 164X00000X | Licensed Vocational Nurse | 223463 | TX | |
| 2083A0300X | Addiction Medicine (Preventive Medicine) Physician Addiction Medicine | F2586 | TX |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1851240105 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 28, 2026 |
| Last updated | Jan 28, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Practice address |
1100 E MULBERRY ST STE A Angleton, TX 77515 (979) 313-2973 Fax (979) 799-8753 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 8 | 5 | 1 | 2 | 4 | 0 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 1 | 1 | 4 | 4 | 0 | 1 | 0 |
Sum = 45 · next multiple of 10 = 50 · check digit = 5 · actual last digit = 5
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.