IndividualActive
Jeffrey Knowles, MD
NPI 1376618694 · Psychiatry Physician · Salem, OR
Jeffrey Knowles, MD is a Psychiatry Physician provider in Salem, OR (NPI 1376618694).
Provider details
- NPI number
- 1376618694
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD22536 (OR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
2600 Center St Ne
Oregon State Hospital Salem
Salem, OR 97301
Phone: (503) 945-2800
Street-level locationGet directions
Mailing address
Po Box 14900
Salem, OR 97309-5016
Registry dates
- Enumerated
- 2006-11-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is Jeffrey Knowles's NPI number?
- Jeffrey Knowles's National Provider Identifier (NPI) is 1376618694, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jeffrey Knowles's specialty?
- Jeffrey Knowles is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Jeffrey Knowles located?
- Jeffrey Knowles's practice location on file with NPPES is 2600 Center St Ne, Salem, OR 97301.
- What is Jeffrey Knowles's phone number?
- The practice phone number listed in the NPPES registry for Jeffrey Knowles is (503) 945-2800.
- Is Jeffrey Knowles's NPI active?
- Yes — Jeffrey Knowles's NPI (1376618694) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.