Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas L Spain Jr., MD

Q: What is the NPI number for Thomas Spain?

The National Provider Identifier (NPI) for Thomas Spain is 1053355321, a Type 1 (individual) record in the CMS NPPES registry.

Addiction Medicine (Preventive Medicine) Physician in Dallas, TX · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1053355321

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Registry record

Entity type Individual (Type 1)

Name Thomas L Spain Jr.

Credential MD

Sex Male

Practice address 1935 Medical District Dr, Dallas, TX, 75235

Phone (214) 456-8131

Enumeration date Jun 16, 2006

Last updated in NPPES Jan 22, 2026

Taxonomy & licenses

207LA0401X Addiction Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License L2672 (TX) Secondary

2083A0300X Addiction Medicine (Preventive Medicine) Physician Allopathic & Osteopathic Physicians · License L2672 (TX) Primary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License L2672 (TX) Secondary

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License L2672 (TX) Secondary

207QA0401X Addiction Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License L2672 (TX) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
159837704	Medicaid	TX	-
159837702	Medicaid	TX	-
159837703	Medicaid	TX	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Thomas Spain practice?

The practice location on file with NPPES is in Dallas, TX. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Thomas Spain?

The National Provider Identifier (NPI) for Thomas Spain is 1053355321, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-22.