Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Michael D. Merren, M.D., P.A.

Q: What type of organization is Michael D. Merren, M.D., P.A.?

Michael D. Merren, M.D., P.A. is registered in NPPES as a Neurology Physician (its primary provider taxonomy).

Neurology Physician in San Antonio, TX · enumerated 2010 · authorized official Michael Merren, President.

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

National Provider Identifier

1790091874

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Registry record

Entity type Organization (Type 2)

Legal business name Michael D. Merren, M.D., P.A.

Practice address 9119 Cinnamon Hl, San Antonio, TX, 78240

Phone (210) 561-7555

Fax (210) 696-2643

Enumeration date Aug 26, 2010

Last updated in NPPES Aug 26, 2010

Taxonomy & classification

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License E1379 (TX) Primary

Authorized official

Name Michael Merren

Title President

Phone (210) 561-7555

Other identifiers

Identifier	Type	State	Issuer
122583103	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

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.

What type of organization is Michael D. Merren, M.D., P.A.?

Michael D. Merren, M.D., P.A. is registered in NPPES as a Neurology Physician (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-08-26.