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

John Guzzo, MS, RD

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1073542494

John Guzzo, MS, RD is an Addiction (Substance Use Disorder) Counselor in Harrisburg, Pennsylvania. Registered with an NPI since 2006.

In the registry since
2006
Specialties on file
2
What do these letters mean?
MS — Master of Science
A graduate science degree.
RD — Registered Dietitian
A credentialed nutrition professional.

See every abbreviation used in this directory →

Practice location Address checks out

3207 N Frnt ST
Harrisburg, PA 17110-1311
Phone: (717) 901-5652
Fax: (717) 901-5037
Show map & directions

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

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X
Addiction (Substance Use Disorder) Counselor Taxonomy 101YA0400X

Record details

NPI number1073542494
Entity typeIndividual (Type 1)
GenderMale
Credentials MS , RD
Sole proprietorNo
NPI enumeratedJune 30, 2006
Last updated in NPPESSeptember 11, 2025

Other providers in Harrisburg