John Marquiss, MSSA
NPI 1508407347 · Clinical Social Worker · Casper, WY
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Marquiss, MSSA is a Clinical Social Worker provider in Casper, WY (NPI 1508407347).
Provider details
- NPI number
- 1508407347
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- MSSA
- Sex
- Male
- Sole proprietor
- No
- License
- LCSW-1596 (WY)
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
6 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
- 2019-10-02
- Last updated
- 2025-01-28
- Certified
- 2025-01-28
Frequently asked questions
- What is John Marquiss's NPI number?
- John Marquiss's National Provider Identifier (NPI) is 1508407347, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Marquiss's specialty?
- John Marquiss is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is John Marquiss located?
- John Marquiss's practice location on file with NPPES is 701 Antler Dr Ste 206, Casper, WY 82601-1749.
- What is John Marquiss's phone number?
- The practice phone number listed in the NPPES registry for John Marquiss is (307) 439-5588.
- Does John Marquiss accept Medicare?
- John Marquiss is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Marquiss's NPI active?
- Yes — John Marquiss's NPI (1508407347) is active in the NPPES registry as of the last update on 2025-01-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.