Sarah Mazzoncini, MS, LMFTA
NPI 1225300288 · Marriage & Family Therapist · Seattle, WA
Sarah Mazzoncini, MS, LMFTA is a Marriage & Family Therapist provider in Seattle, WA (NPI 1225300288).
Provider details
- NPI number
- 1225300288
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- MS, LMFTA
- Sex
- Female
- Sole proprietor
- Yes
- License
- MG60226369 (WA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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
- 2012-02-06
- Last updated
- 2012-02-06
Frequently asked questions
- What is Sarah Mazzoncini's NPI number?
- Sarah Mazzoncini's National Provider Identifier (NPI) is 1225300288, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sarah Mazzoncini's specialty?
- Sarah Mazzoncini is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Sarah Mazzoncini located?
- Sarah Mazzoncini's practice location on file with NPPES is 4500 9th Ave Ne Ste 300, Seattle, WA 98105-4762.
- What is Sarah Mazzoncini's phone number?
- The practice phone number listed in the NPPES registry for Sarah Mazzoncini is (206) 552-0473.
- Is Sarah Mazzoncini's NPI active?
- Yes — Sarah Mazzoncini's NPI (1225300288) is active in the NPPES registry as of the last update on 2012-02-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.