John Marvin, LCSW
NPI 1336755784 · Clinical Social Worker · Portland, OR
John Marvin, LCSW is a Clinical Social Worker provider in Portland, OR (NPI 1336755784).
Provider details
- NPI number
- 1336755784
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sole proprietor
- No
- License
- SWI.LW.70081228 (WA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 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
Mailing address
Registry dates
- Enumerated
- 2020-09-21
- Last updated
- 2026-03-18
- Certified
- 2026-03-18
Frequently asked questions
- What is John Marvin's NPI number?
- John Marvin's National Provider Identifier (NPI) is 1336755784, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Marvin's specialty?
- John Marvin is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is John Marvin located?
- John Marvin's practice location on file with NPPES is 1125 Se Madison St Ste 100e, Portland, OR 97214-3600.
- What is John Marvin's phone number?
- The practice phone number listed in the NPPES registry for John Marvin is (503) 597-8237.
- Is John Marvin's NPI active?
- Yes — John Marvin's NPI (1336755784) is active in the NPPES registry as of the last update on 2026-03-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.