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

Mark Diddens, LMSW

Individual provider Mental Health Counselor · NPI 1326754151

Mark Diddens, LMSW is a Mental Health Counselor in Nashville, Tennessee. Works from 3 locations. Licensed in Illinois and Tennessee.

Licensed in
IL, TN
In the registry since
2023
Specialties on file
2
What do these letters mean?
LMSW — Licensed Master Social Worker
A master's-level social worker, usually practising under supervision.

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Practice location Address checks out

2000 Glen Echo Rd Ste 200
Nashville, TN 37215-2898
Phone: (615) 649-8656
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 631 N Longwood St Ste 103, Rockford, IL 61107-4263 — (815) 692-5585
  • 210 25th Ave N Ste 601, Nashville, TN 37203-1631 — (815) 541-1741

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X · Licence 150.110236 (IL)
Mental Health Counselor Taxonomy 101YM0800X · Licence 14623 (TN)

Record details

NPI number1326754151
Entity typeIndividual (Type 1)
GenderMale
Credentials LMSW
Sole proprietorNo
NPI enumeratedJanuary 25, 2023
Last updated in NPPESJune 10, 2023
Certification dateJune 10, 2023

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