Alexa Mason, MD
NPI 1003494881 · Pediatrics Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexa Mason, MD is a Pediatrics Physician provider in Seattle, WA (NPI 1003494881).
Provider details
- NPI number
- 1003494881
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 61529615 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 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
- 2021-03-31
- Last updated
- 2024-10-03
- Certified
- 2024-10-03
Frequently asked questions
- What is Alexa Mason's NPI number?
- Alexa Mason's National Provider Identifier (NPI) is 1003494881, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexa Mason's specialty?
- Alexa Mason is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Alexa Mason located?
- Alexa Mason's practice location on file with NPPES is 2671 Ne 46th St, Seattle, WA 98105-5041.
- What is Alexa Mason's phone number?
- The practice phone number listed in the NPPES registry for Alexa Mason is (206) 525-8000.
- Does Alexa Mason accept Medicare?
- Alexa Mason is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexa Mason's NPI active?
- Yes — Alexa Mason's NPI (1003494881) is active in the NPPES registry as of the last update on 2024-10-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.