Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Rex A Marco, M.D.

Orthopaedic Surgery of the Spine Physician in Houston, TX · enumerated 2006 · practices at Tmh Physician Associates Pllc.

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

National Provider Identifier

1205861887

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Registry record

Entity type Individual (Type 1)

Name Rex A Marco

Credential M.D.

Sex Male

Practice address 6445 Main St, Suite 2500, Houston, TX, 77030

Phone (713) 363-7510

Fax (713) 790-6202

Enumeration date Jul 11, 2006

Last updated in NPPES Mar 8, 2017

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License L1378 (TX) Secondary

207XS0117X Orthopaedic Surgery of the Spine Physician Allopathic & Osteopathic Physicians · License L1378 (TX) Primary

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
047345603	Medicaid	TX	-
8R7011	Other	TX	BCBS
8EW604	Other	TX	BLUE CROSS BLUE SHIELD
047345604	Other	TX	CSHCN
047345607	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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Rex Marco?

Rex Marco is registered in NPPES with the primary taxonomy of Orthopaedic Surgery of the Spine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-03-08.