IndividualActive
Mark Siemens, LCSW
NPI 1598700429 · Clinical Social Worker · Eugene, OR
Mark Siemens, LCSW is a Clinical Social Worker provider in Eugene, OR (NPI 1598700429).
Provider details
- NPI number
- 1598700429
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- No
- License
- 002051 (OR)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
1200 Hilyard St
Eugene, OR 97401-8122
Phone: (541) 744-0828
Fax: (541) 687-6214
Street-level locationGet directions
Mailing address
Po Box 24410
Eugene, OR 97402-0451
Registry dates
- Enumerated
- 2006-06-17
- Last updated
- 2012-07-02
Frequently asked questions
- What is Mark Siemens's NPI number?
- Mark Siemens's National Provider Identifier (NPI) is 1598700429, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Siemens's specialty?
- Mark Siemens is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Siemens located?
- Mark Siemens's practice location on file with NPPES is 1200 Hilyard St, Eugene, OR 97401-8122.
- What is Mark Siemens's phone number?
- The practice phone number listed in the NPPES registry for Mark Siemens is (541) 744-0828.
- Is Mark Siemens's NPI active?
- Yes — Mark Siemens's NPI (1598700429) is active in the NPPES registry as of the last update on 2012-07-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.