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

Mrs. Diane McMahon, LPC, RN

Individual provider Professional Counselor · NPI 1609179977

Mrs. Diane McMahon, LPC, RN is a Mental Health Counselor in Lawrenceville, New Jersey. Qualified in 2007, 19 years ago. Practices as a sole proprietor, accepts Medicare assignment and offers telehealth. Licensed in New Jersey.

Years since qualifying
19
Licensed in
NJ
In the registry since
2010
What do these letters mean?
LPC — Licensed Professional Counselor
A licensed mental health counsellor.
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

133 Franklin Corner Rd 2nd Fl Psychotherapy Ste
Lawrenceville, NJ 08648-2531
Phone: (609) 937-5881
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Professional Counselor (primary) Taxonomy 101YP2500X · Licence 37PC00374900 (NJ)

Record details

NPI number1609179977
Entity typeIndividual (Type 1)
GenderFemale
Credentials LPC , RN
Sole proprietorYes
NPI enumeratedDecember 8, 2010
Last updated in NPPESJune 2, 2020
Certification dateJune 2, 2020

Medicare enrollment

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

Medicare specialtyMENTAL HEALTH COUNSELOR
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in Lawrenceville