Gary Somdahl, CDP
NPI 1821205808 · Addiction (Substance Use Disorder) Counselor · Richland, WA
Gary Somdahl, CDP is a Addiction (Substance Use Disorder) Counselor provider in Richland, WA (NPI 1821205808).
Provider details
- NPI number
- 1821205808
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- CDP
- Sex
- Male
- Sole proprietor
- Yes
- License
- CP00001001 (WA)
Specialties & taxonomies
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
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
Mailing address
Registry dates
- Enumerated
- 2007-05-17
- Last updated
- 2007-07-08
Frequently asked questions
- What is Gary Somdahl's NPI number?
- Gary Somdahl's National Provider Identifier (NPI) is 1821205808, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Somdahl's specialty?
- Gary Somdahl is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Gary Somdahl located?
- Gary Somdahl's practice location on file with NPPES is 1305 Mansfield St, Richland, WA 99352-3588.
- What is Gary Somdahl's phone number?
- The practice phone number listed in the NPPES registry for Gary Somdahl is (509) 942-1624.
- Is Gary Somdahl's NPI active?
- Yes — Gary Somdahl's NPI (1821205808) 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.