Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

George Knappenberger, MD

Geriatric Medicine (Internal Medicine) Physician in Warren, OH · enumerated 2006.

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

National Provider Identifier

1326016866

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Registry record

Entity type Individual (Type 1)

Name George Knappenberger

Credential MD

Sex Male

Practice address 1350 E Market St, Warren, OH, 44483

Phone (330) 841-9822

Fax (330) 841-9281

Enumeration date Mar 10, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 35078786 (OH) 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
2380392	Medicaid	OH	-

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 George Knappenberger?

George Knappenberger is registered in NPPES with the primary taxonomy of Geriatric Medicine (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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Ernest Depasquale Emergency Medicine Physician · Warren, OH NPI 1508850611 Leonard Blass Infectious Disease Physician · Warren, OH NPI 1780678599 Linda Olmstead Anatomic Pathology & Clinical Pathology Physician · Warren, OH NPI 1073584959 Rajagopalan Lakshminarasimhan Internal Medicine Physician · Warren, OH NPI 1619943057 Robert Gurdak Anatomic Pathology & Clinical Pathology Physician · Warren, OH NPI 1336116425 Trumbull Pathology Associates Anatomic Pathology & Clinical Pathology Physician · Warren, OH NPI 1033174420 Margaret Layshock Certified Registered Nurse Anesthetist · Warren, OH NPI 1063460392 Richard Bell Certified Registered Nurse Anesthetist · Warren, OH NPI 1881644698

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.