Thomas Spain, MD
Thomas Spain, MD is an Addiction Medicine (Preventive Medicine) Physician in Dallas, TX, registered under NPI 1053355321. This provider registers 5 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 1935 MEDICAL DISTRICT DR, Dallas, TX 75235. 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 |
|---|---|---|
| L2672 | TX | Addiction Medicine (Preventive Medicine)… primary |
| L2672 | TX | Addiction Medicine (Anesthesiology)… |
| L2672 | TX | Anesthesiology Physician |
| L2672 | TX | Pain Medicine (Anesthesiology) Physician |
| L2672 | TX | Addiction Medicine (Family Medicine)… |
This provider holds licence L2672 issued in TX. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Anesthesiology
- PAC ID
- 3072530526
- Enrollment ID
- I20051025000262
Medicare enrolment is recorded as approved under the provider type Practitioner - Anesthesiology. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Addiction Medicine covers
A physician engaged in the subspecialty practice of Addiction Medicine who specializes in the prevention, evaluation, diagnosis, treatment, and recovery of persons with the disease of addiction. NUCC Health Care Provider Taxonomy, code 2083A0300X
All registered taxonomy codes
This provider registers 5 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2083A0300X | Addiction Medicine (Preventive Medicine) Physician Addiction Medicine | L2672 | TX | primary |
| 207LA0401X | Addiction Medicine (Anesthesiology) Physician Addiction Medicine | L2672 | TX | |
| 207L00000X | Anesthesiology Physician | L2672 | TX | |
| 207LP2900X | Pain Medicine (Anesthesiology) Physician Pain Medicine | L2672 | TX | |
| 207QA0401X | Addiction Medicine (Family Medicine) Physician Addiction Medicine | L2672 | 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 | 1053355321 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 16, 2006 |
| Last updated | Jan 22, 2026 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
1935 MEDICAL DISTRICT DR Dallas, TX 75235 (214) 456-8131 |
| Other identifiers |
159837704
· Medicaid (TX) 159837702 · Medicaid (TX) 159837703 · Medicaid (TX) |
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 | 0 | 5 | 3 | 3 | 5 | 5 | 3 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 1 | 3 | 6 | 5 | 1 | 3 | 4 |
Sum = 49 · next multiple of 10 = 50 · check digit = 1 · actual last digit = 1
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.