Leonard Brennan, LPC, LCAS
Addiction (Substance Use Disorder) Counselor · Klamath Falls, OR
Leonard Brennan, LPC, LCAS is an addiction (substance use disorder) counselor with a practice address in Klamath Falls, Oregon, and NPI 1518323369, issued on Jan 10, 2016. Check the license (Oregon C4915, as entered in NPPES) with the Oregon board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Leonard Brennan
- Credential
- LPC, LCAS
- Primary taxonomy
- Addiction (Substance Use Disorder) Counselor 101YA0400X
- License numbers
- C4915 OR
10804 NC
21265 NC
Self-reported in NPPES; status is on the state search - Practice location
- 2074 S 6TH St, Klamath Falls, OR 97601
- Phone
- (541) 851-8110
- Enumerated
- Jan 10, 2016
- Entity
- Type 1 · individual
Also registered at 2074 S 6TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brittney AgardCase Manager/Care Coordinator1841004736
- Scott Alexander, FNPFamily Nurse Practitioner1831439454
- Maria Alonso, RNCase Management Registered Nurse1578835856
- Roy Babb, PHARM.D.Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1912549544
- Brian Blackman, DNPFamily Nurse Practitioner1356173850
- Thalia Brennan, LPCMental Health Counselor1811280639
Verify Leonard Brennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oregon board licenses this profession
Search for license C4915Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
114 addiction (substance use disorder) counselor records list a Klamath Falls practice address
They are 114 of the 1,946 NPPES records with a Klamath Falls practice address, and 4,458 addiction (substance use disorder) counselor records in Oregon. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 114 in Klamath Falls → All 4,458 in Oregon → Every provider in Klamath Falls →
Other addiction (substance use disorder) counselor records in Oregon
- Christie Aaron, CADC-RSalem, OR1871371500
- Brianna Abbey, MA, LPC, CADC 1Portland, OR1710133665
- Haitham AbdallahBeaverton, OR1730955378
- Lul Abdullahi, CADC-RPortland, OR1942012091
- Nicholas AbelEugene, OR1811309487
- Gabbrielle AberasturiOntario, OR1609658236
- Tzaphkiel AblossiPortland, OR1588486427
- Jessica Abramson, CADCEugene, OR1649905787
- Josefina Acevedo-GilesPortland, OR1184119315
- Greg AckermanPortland, OR1225421514
Common questions
What is Leonard Brennan, LPC, LCAS's NPI number?
Leonard Brennan, LPC, LCAS's National Provider Identifier (NPI) is 1518323369, issued on Jan 10, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Leonard Brennan, LPC, LCAS located?
The NPPES record lists a practice address at 2074 S 6TH St, Klamath Falls, OR, 97601. Phone: (541) 851-8110. Providers update this record themselves, so call before visiting.
How can I verify Leonard Brennan, LPC, LCAS's license?
NPPES lists Oregon license number C4915, as entered by the provider. Search the Oregon board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.