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Ervin Siverson, LCSW
NPI 1669648630 · Clinical Social Worker · Portland, OR
Ervin Siverson, LCSW is a Clinical Social Worker provider in Portland, OR (NPI 1669648630).
Provider details
- NPI number
- 1669648630
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- No
- License
- L2546 (OR)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(87/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
500 Ne Multnomah St
Suite 100
Portland, OR 97232-2023
Phone: (503) 813-2000
Street-level locationGet directions
Mailing address
500 Ne Multnomah St
Portland, OR 97232-2023
Registry dates
- Enumerated
- 2008-04-30
- Last updated
- 2008-04-30
Frequently asked questions
- What is Ervin Siverson's NPI number?
- Ervin Siverson's National Provider Identifier (NPI) is 1669648630, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ervin Siverson's specialty?
- Ervin Siverson is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Ervin Siverson located?
- Ervin Siverson's practice location on file with NPPES is 500 Ne Multnomah St, Portland, OR 97232-2023.
- What is Ervin Siverson's phone number?
- The practice phone number listed in the NPPES registry for Ervin Siverson is (503) 813-2000.
- Is Ervin Siverson's NPI active?
- Yes — Ervin Siverson's NPI (1669648630) is active in the NPPES registry as of the last update on 2008-04-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.