Margaret Johnston, DDS
NPI 1144390238 · General Practice Dentistry · Seattle, WA
Enrolled with Medicare as Order and Referring Only - Dentist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Johnston, DDS is a General Practice Dentistry provider in Seattle, WA (NPI 1144390238).
Provider details
- NPI number
- 1144390238
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Credential
- DDS
- Sex
- Female
- Sole proprietor
- No
- License
- DE00006302 (WA)
Specialties & taxonomies
Dental 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
- 2006-11-08
- Last updated
- 2015-08-24
Frequently asked questions
- What is Margaret Johnston's NPI number?
- Margaret Johnston's National Provider Identifier (NPI) is 1144390238, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Johnston's specialty?
- Margaret Johnston is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is Margaret Johnston located?
- Margaret Johnston's practice location on file with NPPES is 133 Dexter Ave N, Seattle, WA 98109-5103.
- What is Margaret Johnston's phone number?
- The practice phone number listed in the NPPES registry for Margaret Johnston is (206) 324-5453.
- Does Margaret Johnston accept Medicare?
- Margaret Johnston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Johnston's NPI active?
- Yes — Margaret Johnston's NPI (1144390238) is active in the NPPES registry as of the last update on 2015-08-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.