Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Charles Rittenhouse, MD

Surgery Physician in San Antonio, TX · enumerated 2005.

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

National Provider Identifier

1538155270

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Registry record

Entity type Individual (Type 1)

Name Mark Charles Rittenhouse

Credential MD

Sex Male

Practice address 7940 Floyd Curl, #840, San Antonio, TX, 78229

Phone (210) 614-3349

Fax (210) 614-7550

Enumeration date Sep 27, 2005

Last updated in NPPES Jul 11, 2013

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License E0593 (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
089881903	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 the NPI number for Mark Rittenhouse?

The National Provider Identifier (NPI) for Mark Rittenhouse is 1538155270, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Rittenhouse practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-07-11.