Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Michael G Keller, DO

Internal Medicine Physician in Port Neches, TX · enumerated 2005.

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

National Provider Identifier

1417945734

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Registry record

Entity type Individual (Type 1)

Name Michael G Keller

Credential DO

Sex Male

Practice address Port Neches, TX, 77651

Phone (409) 962-7606

Fax (409) 962-6027

Enumeration date Oct 11, 2005

Last updated in NPPES May 31, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License F1700 (TX) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
093658503	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 Michael Keller?

Michael Keller 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.

Other providers at this practice address

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Michael G Keller Do PA Internal Medicine Physician · Port Neches, TX NPI 1134286917 Richard G Bowling Durable Medical Equipment & Medical Supplies · Port Neches, TX NPI 1902074941

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-05-31.