Mason Greenslade, D.C.
NPI 1366865388 · Chiropractor · Seattle, WA
Enrolled with Medicare as Practitioner - Chiropractic · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mason Greenslade, D.C. is a Chiropractor provider in Seattle, WA (NPI 1366865388).
Provider details
- NPI number
- 1366865388
- Entity type
- Individual
- Primary specialty
- ChiropractorChiropractic Providers
- Credential
- D.C.
- Sex
- Male
- Sole proprietor
- No
- License
- 60431420 (WA)
Specialties & taxonomies
Chiropractic Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 27514 82nd Dr NwStanwood, WA 98292-9564Phone: (425) 387-7215
Registry dates
- Enumerated
- 2014-01-27
- Last updated
- 2020-01-15
- Certified
- 2020-01-15
Frequently asked questions
- What is Mason Greenslade's NPI number?
- Mason Greenslade's National Provider Identifier (NPI) is 1366865388, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mason Greenslade's specialty?
- Mason Greenslade is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).
- Where is Mason Greenslade located?
- Mason Greenslade's practice location on file with NPPES is 928 Nw Leary Way, Seattle, WA 98107.
- What is Mason Greenslade's phone number?
- The practice phone number listed in the NPPES registry for Mason Greenslade is (425) 387-7215.
- Does Mason Greenslade accept Medicare?
- Mason Greenslade is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mason Greenslade's NPI active?
- Yes — Mason Greenslade's NPI (1366865388) is active in the NPPES registry as of the last update on 2020-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.