Julia Mattson, MD, PHD
NPI 1245624295 · Developmental - Behavioral Pediatrics Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Julia Mattson, MD, PHD is a Developmental - Behavioral Pediatrics Physician provider in Seattle, WA (NPI 1245624295).
Provider details
- NPI number
- 1245624295
- Entity type
- Individual
- Primary specialty
- Developmental - Behavioral Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Female
- Sole proprietor
- No
- License
- MD60833933 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 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
- 2015-03-26
- Last updated
- 2021-06-15
- Certified
- 2021-06-15
Frequently asked questions
- What is Julia Mattson's NPI number?
- Julia Mattson's National Provider Identifier (NPI) is 1245624295, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Julia Mattson's specialty?
- Julia Mattson is listed in the NPPES registry with a primary specialty of Developmental - Behavioral Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Julia Mattson located?
- Julia Mattson's practice location on file with NPPES is 4800 Sand Point Way Ne, Seattle, WA 98105-3901.
- What is Julia Mattson's phone number?
- The practice phone number listed in the NPPES registry for Julia Mattson is (206) 987-2000.
- Does Julia Mattson accept Medicare?
- Julia Mattson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Julia Mattson's NPI active?
- Yes — Julia Mattson's NPI (1245624295) is active in the NPPES registry as of the last update on 2021-06-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.