Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Wallace H Knapp, M.D.

Dermatology Physician in Corvallis, OR · enumerated 2006.

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

National Provider Identifier

1972553220

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Registry record

Entity type Individual (Type 1)

Name Wallace H Knapp

Credential M.D.

Sex Male

Practice address 444 Nw Elks Dr, Corvallis, OR, 97330

Phone (541) 754-1150

Enumeration date May 10, 2006

Last updated in NPPES Jun 5, 2009

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License MD07935 (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
242669	Medicaid	OR	-

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

How do I verify Wallace Knapp's NPI record?

Cross-check NPI 1972553220 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1972553220 active?

Yes, as of the latest NPPES snapshot, NPI 1972553220 is active (record last updated 2009-06-05).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-06-05.