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

Nathaniel M Grassi, MS

Individual provider Mental Health Counselor · NPI 1881371615

Nathaniel M Grassi, MS is a Mental Health Counselor in Jacksonville, Florida. Qualified in 2022, 4 years ago. Works from 2 locations. Licensed in Florida.

Years since qualifying
4
Licensed in
FL
In the registry since
2023
What do these letters mean?
MS — Master of Science
A graduate science degree.

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Practice location Address checks out

836 Prudential Dr Ste 1507
Jacksonville, FL 32207-8342
Phone: (904) 376-3800
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 820 Prudential Dr Ste 510, Jacksonville, FL 32207-8207 — (904) 376-3800

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X · Licence MH25377 (FL)

Record details

NPI number1881371615
Entity typeIndividual (Type 1)
GenderFemale
Credentials MS
Sole proprietorNo
NPI enumeratedJuly 3, 2023
Last updated in NPPESApril 27, 2026
Certification dateApril 27, 2026

Medicare enrollment

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

Medicare specialtyMENTAL HEALTH COUNSELOR
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Accepts Medicare assignment Not indicated
Practice locations2 on file with Medicare

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