Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Louis Walthall, LCSWR, CASAC

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1558502880

Louis Walthall, LCSWR, CASAC is a Clinical Social Worker in Ronkonkoma, New York. Qualified in 1994, 32 years ago. Practices with Nassau Psychology, PC, a 23-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
32
Licensed in
NY
In the registry since
2009
Specialties on file
4

Practice location Address checks out

3281 Veterans Memorial Hwy Ste E14
Ronkonkoma, NY 11779-7675
Phone: (631) 471-3122
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 051661 (NY)
Addiction (Substance Use Disorder) Counselor Taxonomy 101YA0400X · Licence 73 051661 (NY)
Mental Health Counselor Taxonomy 101YM0800X · Licence 73 051661 (NY)
Addiction (Substance Use Disorder) Counselor Taxonomy 101YA0400X · Licence 9438 (NY)

Record details

NPI number1558502880
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSWR , CASAC
Sole proprietorNo
NPI enumeratedMarch 17, 2009
Last updated in NPPESFebruary 22, 2018

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 1994 (32 years in practice)
Group practice Nassau Psychology, P.C. — 23 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Ronkonkoma