Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jeffrey James Knowles, MD

Psychiatry Physician in Salem, OR · enumerated 2006.

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

National Provider Identifier

1376618694

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Registry record

Entity type Individual (Type 1)

Name Jeffrey James Knowles

Credential MD

Sex Male

Practice address 2600 Center St Ne, Oregon State Hospital Salem, Salem, OR, 97301

Phone (503) 945-2800

Enumeration date Nov 21, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License MD22536 (OR) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Jeffrey Knowles's NPI record?

Cross-check NPI 1376618694 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1376618694 active?

Yes, as of the latest NPPES snapshot, NPI 1376618694 is active (record last updated 2007-07-08).

Other providers at this practice address

Browse all →

Dhs/Office of Financial Services Irs/Eopc/Bmrc/Eotc/Osh/Osh-P Psychiatric Hospital · Salem, OR NPI 1508802489 Alexander Jones Pharmacist · Salem, OR NPI 1366545766 Merrilee Johnson Pharmacist · Salem, OR NPI 1275636672 Steven Wilson Clinical Psychologist · Salem, OR NPI 1720181134 Albert Chan Psychiatric Pharmacist · Salem, OR NPI 1831292234 Gregory Dayton Psychiatric Pharmacist · Salem, OR NPI 1194828590 Carlene Shultz Psychologist · Salem, OR NPI 1063515476 Lorraine Linder-Skach Psychiatry Physician · Salem, OR NPI 1912001140

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