Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Martha Frances Gerteisen, M.D.

Internal Medicine Physician in Pearland, TX · enumerated 2005.

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

National Provider Identifier

1942297536

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Registry record

Entity type Individual (Type 1)

Name Martha Frances Gerteisen

Credential M.D.

Sex Female

Practice address 8520 W. Broadway Street, Suite 200, Pearland, TX, 77584

Phone (281) 485-4050

Fax (281) 485-6850

Enumeration date Sep 29, 2005

Last updated in NPPES Jan 11, 2017

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License K5539 (TX) Primary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License K5539 (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
P01316162	Other	TX	RR MEDICARE
P01643107	Other	TX	RR MEDICARE
8FT479	Other	TX	BCBS
121369614	Medicaid	TX	-
8EB342	Other	TX	BCBS
8FT479	Other	TX	BLUE CROSS BLUE SHIELD
121369613	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 specialty is Martha Gerteisen?

Martha Gerteisen is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-01-11.