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

Frank Geoffrey Marx, MD

Q: What is the NPI number for Frank Marx?

The National Provider Identifier (NPI) for Frank Marx is 1942296678, a Type 1 (individual) record in the CMS NPPES registry.

Internal Medicine Physician in Klamath Falls, OR · enumerated 2005.

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

National Provider Identifier

1942296678

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Registry record

Entity type Individual (Type 1)

Name Frank Geoffrey Marx

Credential MD

Sex Male

Practice address Klamath Falls, OR, 97601

Phone (541) 274-6311

Fax (541) 884-0730

Enumeration date Sep 27, 2005

Last updated in NPPES Dec 20, 2013

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 10494 (OR) 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
126466	Medicaid	OR	-
R720000BHHFV	Other	OR	MEDICARE - TYPE B

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 Frank Marx?

The National Provider Identifier (NPI) for Frank Marx is 1942296678, a Type 1 (individual) record in the CMS NPPES registry.

Where does Frank Marx practice?

The practice location on file with NPPES is in Klamath Falls, OR. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Grant Niskanen Family Medicine Physician · Klamath Falls, OR NPI 1801898358 Slavka Kucinska Internal Medicine Physician · Klamath Falls, OR NPI 1982698221 Jeffrey Walker Anatomic Pathology & Clinical Pathology Physician · Klamath Falls, OR NPI 1801883319 Miguel Montes Clinical Pathology/Laboratory Medicine Physician · Klamath Falls, OR NPI 1083688360 Konrad Eppel Emergency Medicine Physician · Klamath Falls, OR NPI 1669449120 Sky Lakes Medical Center Inc General Acute Care Hospital · Klamath Falls, OR NPI 1659340370 J Brunswick Emergency Medicine Physician · Klamath Falls, OR NPI 1902864275 Stefan Jodko Anesthesiology Physician · Klamath Falls, OR NPI 1740238377

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-12-20.