Dayton Nelsen, LMSW
NPI 1417670654 · Clinical Social Worker · Saint Louis, MO
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dayton Nelsen, LMSW is a Clinical Social Worker provider in Saint Louis, MO (NPI 1417670654).
Provider details
- NPI number
- 1417670654
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LMSW
- Sex
- Male
- Sole proprietor
- No
- License
- 2020031628 (MO)
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
3 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
- 2022-09-22
- Last updated
- 2022-12-02
- Certified
- 2022-12-02
Frequently asked questions
- What is Dayton Nelsen's NPI number?
- Dayton Nelsen's National Provider Identifier (NPI) is 1417670654, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dayton Nelsen's specialty?
- Dayton Nelsen is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Dayton Nelsen located?
- Dayton Nelsen's practice location on file with NPPES is 2650 Olive St, Saint Louis, MO 63103-1489.
- What is Dayton Nelsen's phone number?
- The practice phone number listed in the NPPES registry for Dayton Nelsen is (314) 802-2647.
- Does Dayton Nelsen accept Medicare?
- Dayton Nelsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dayton Nelsen's NPI active?
- Yes — Dayton Nelsen's NPI (1417670654) is active in the NPPES registry as of the last update on 2022-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.