Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mark A. Melish, M.D., P.A.

Q: What type of organization is Mark A. Melish, M.D., P.A.?

Mark A. Melish, M.D., P.A. is registered in NPPES as a Anesthesiology Physician (its primary provider taxonomy).

Anesthesiology Physician in San Antonio, TX · enumerated 2006 · authorized official Mark Melish, Owner.

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

National Provider Identifier

1437254547

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Registry record

Entity type Organization (Type 2)

Legal business name Mark A. Melish, M.D., P.A.

Practice address 621 N Alamo St, San Antonio, TX, 78215

Phone (210) 227-5223

Fax (210) 224-6945

Enumeration date Sep 13, 2006

Last updated in NPPES Jun 16, 2015

Taxonomy & classification

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License G8278 (TX) Primary

Authorized official

Name Mark Melish

Title Owner

Phone (210) 227-5223

Other identifiers

Identifier	Type	State	Issuer
00B60T	Other	TX	BCBS TEXAS
050009511	Other	TX	RAILROAD MEDICARE
157277801	Medicaid	TX	-
103527100	Other	TX	USDOL

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

What type of organization is Mark A. Melish, M.D., P.A.?

Mark A. Melish, M.D., P.A. is registered in NPPES as a Anesthesiology Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-06-16.