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John Masterson
NPI 1427235084 · Chiropractor · Seattle, WA
John Masterson is a Chiropractor provider in Seattle, WA (NPI 1427235084).
Provider details
- NPI number
- 1427235084
- Entity type
- Individual
- Primary specialty
- ChiropractorChiropractic Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- CHOOO33793 (WA)
Specialties & taxonomies
Chiropractic Providers
Profile Score
Detailed profile(88/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
925 8th Ave N
Seattle, WA 98109-6304
Phone: (206) 957-9050
Street-level locationGet directions
Mailing address
535 Pontius Ave N Apt 611
Seattle, WA 98109-4455
Registry dates
- Enumerated
- 2008-01-25
- Last updated
- 2008-01-25
Frequently asked questions
- What is John Masterson's NPI number?
- John Masterson's National Provider Identifier (NPI) is 1427235084, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Masterson's specialty?
- John Masterson is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).
- Where is John Masterson located?
- John Masterson's practice location on file with NPPES is 925 8th Ave N, Seattle, WA 98109-6304.
- What is John Masterson's phone number?
- The practice phone number listed in the NPPES registry for John Masterson is (206) 957-9050.
- Is John Masterson's NPI active?
- Yes — John Masterson's NPI (1427235084) is active in the NPPES registry as of the last update on 2008-01-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.