Gillian Sleeman, MA, LMFT
NPI 1740509017 · Marriage & Family Therapist · Lake Oswego, OR
Gillian Sleeman, MA, LMFT is a Marriage & Family Therapist provider in Lake Oswego, OR (NPI 1740509017).
Provider details
- NPI number
- 1740509017
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- MA, LMFT
- Sex
- Female
- Sole proprietor
- Yes
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
16 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2010-05-25
- Last updated
- 2023-10-25
- Certified
- 2023-10-25
Frequently asked questions
- What is Gillian Sleeman's NPI number?
- Gillian Sleeman's National Provider Identifier (NPI) is 1740509017, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gillian Sleeman's specialty?
- Gillian Sleeman is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Gillian Sleeman located?
- Gillian Sleeman's practice location on file with NPPES is 470 2nd St, Lake Oswego, OR 97034-3199.
- What is Gillian Sleeman's phone number?
- The practice phone number listed in the NPPES registry for Gillian Sleeman is (503) 234-9591.
- Is Gillian Sleeman's NPI active?
- Yes — Gillian Sleeman's NPI (1740509017) is active in the NPPES registry as of the last update on 2023-10-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.