Gillian Sleeman, MA, LMFT
Marriage & Family Therapist · Lake Oswego, OR
Gillian Sleeman, MA, LMFT is a marriage & family therapist with a practice address in Lake Oswego, Oregon, and NPI 1740509017, issued on May 25, 2010. Check the license with the Oregon board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gillian Sleeman
- Credential
- MA, LMFT
- Primary taxonomy
- Marriage & Family Therapist 106H00000X
- Practice location
- 470 2ND St, Lake Oswego, OR 97034
- Phone
- (503) 234-9591
- Enumerated
- May 25, 2010
- Record last updated
- Oct 25, 2023
- Entity
- Type 1 · individual
8 nearest marriage & family therapist records → All 1,434 in Oregon → Look up another NPI →
Also registered at 470 2ND St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Debbie Leas, LMFTMarriage & Family Therapist1023497948
Verify Gillian Sleeman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oregon board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gillian Sleeman among 1,434 marriage & family therapist records in Oregon
Gillian Sleeman, MA, LMFT is one of 1,434 marriage & family therapist records with a practice address in Oregon. 5% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2010, is newer than 28% of them.
- NPI issued2010 · 28% of these records are older, 66% newer
- In a Medicare fileNo · 5% of these records are
- In the CMS Doctors and Clinicians fileNo · 10% of these records are
- Record last updated2023 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 106H00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 marriage & family therapist records list a practice address in Lake Oswego
They are 20 of the 1,377 NPPES records with a practice address in Lake Oswego, and 1,434 marriage & family therapist records in Oregon. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,434 in Oregon → Every provider in Lake Oswego → Marriage & Family Therapist nationwide →
The 8 marriage & family therapist records with the nearest ZIP codes
- Patricia Crosthwait, LMFT, LPC, ATR-BCLake Oswego, OR 970341609993575
- Alexandra HarringtonLake Oswego, OR 970341063214278
- Debbie Leas, LMFTLake Oswego, OR 970341023497948
- Alanna LynemLake Oswego, OR 970341992258586
- Dawn MyersLake Oswego, OR 970341053123463
- Zanita Zody, PHD, LMFTLake Oswego, OR 970341881179141
- Amanda Bernal, LMFTLake Oswego, OR 970351962800789
- Annora Cavoulas, M.A. LMFTLake Oswego, OR 970351801958178
Common questions
What is Gillian Sleeman, MA, LMFT's NPI number?
Gillian Sleeman, MA, LMFT's National Provider Identifier (NPI) is 1740509017, issued on May 25, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Gillian Sleeman, MA, LMFT located?
The NPPES record lists a practice address at 470 2ND St, Lake Oswego, OR, 97034. Phone: (503) 234-9591. Providers update this record themselves, so call before visiting.
How can I verify Gillian Sleeman, MA, LMFT's license?
Search the Oregon board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.