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NATHANIEL M GRASSI MS
NPI 1881371615
Counselor - Mental Health in Jacksonville, FL

Active since July 03, 2023PECOS Enrolled
836 PRUDENTIAL DR STE 1507, JACKSONVILLE, FL 32207(904) 376-3800 Get Directions Write a Review

NPPES record last updated: April 27, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 27, 2026, Mar 24, 2025, Jul 3, 2023 (3 updates tracked since 2023).

About Nathaniel M Grassi Ms NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

NATHANIEL M GRASSI MS (NPI 1881371615) is an individual mental health provider in Jacksonville, Florida, licensed in Florida (MH25377) and active in the NPI registry since July 2023. She is enrolled in Medicare PECOS, maintains a secondary practice location in Jacksonville, and is a graduate of Other (2022).

NPPES Registry Identity

NPI1881371615
Entity TypeIndividualFemale
Primary Taxonomy101YM0800X
Provider Legal NameNATHANIEL M GRASSICredential: MS
Location Address836 PRUDENTIAL DR STE 1507Jacksonville, FL 32207-8342
Mailing AddressPo Box 748519Atlanta, GA 30374-8519 · (904) 376-3800
Phone(904) 376-3800
Sole ProprietorNo
Medical School CMSOtherGraduated 2022
Enumeration DateJuly 3, 2023
Last NPPES UpdateApril 27, 20263 updates tracked since enumeration
NPPES CertifiedApril 27, 2026
✔ NPI 1881371615 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
License✔ Licensed in FL · MH25377
836 PRUDENTIAL DR STE 1507, Jacksonville, FL 32207
Open in Google Maps ↗

Secondary Practice Location 1

Location 1820 Prudential Dr Ste 510Jacksonville, FL 32207-8207 · Phone (904) 376-3800

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Nathaniel M Grassi Ms is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6002384286
PECOS Enrollment IDI20260506001010
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MRS. CHRISTINE NICOLE CREWS ARNP
Nurse Practitioner (Psychiatric/Mental Health)
836 PRUDENTIAL DR STE 1507
JACKSONVILLE, FL 32207
Duval County (904) 376-3800
HIDI LEIGH MCCHESNEY MOODY APRN
Nurse Practitioner (Psychiatric/Mental Health)
836 PRUDENTIAL DR STE 1507
JACKSONVILLE, FL 32207
Duval County (904) 376-3800
KELLY LYNN SHURMAN LMHC
Counselor (Mental Health)
836 PRUDENTIAL DR STE 1507
JACKSONVILLE, FL 32207
Duval County (904) 376-3800
SARA MAE SIMPSON LMHC
Counselor (Mental Health)
836 PRUDENTIAL DR STE 1507
JACKSONVILLE, FL 32207
Duval County (904) 376-3800
RYAN RISH
Social Worker (Clinical)
836 PRUDENTIAL DR STE 1507
JACKSONVILLE, FL 32207
Duval County (904) 376-3800
DORIE ELIZABETH HANSON LMHC
Counselor (Mental Health)
836 PRUDENTIAL DR STE 1507
JACKSONVILLE, FL 32207
Duval County (904) 376-3800
ALLISON NICOLE FENDLEY LMHC
Counselor (Mental Health)
836 PRUDENTIAL DR STE 1507
JACKSONVILLE, FL 32207
Duval County (904) 376-3800
DEBORAH ELLEN ANTHONY LMHC
Counselor (Mental Health)
836 PRUDENTIAL DR STE 1507
JACKSONVILLE, FL 32207
Duval County (904) 376-3800

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Nathaniel Grassi's NPI number?

The NPI number for Nathaniel Grassi is 1881371615. It was assigned to this individual provider in the NPPES registry on July 3, 2023.

Where is Nathaniel Grassi located?

Nathaniel Grassi practices at 836 Prudential Dr Ste 1507, Jacksonville, FL 32207. The listed phone number is (904) 376-3800.

What is Nathaniel Grassi's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

Is Nathaniel Grassi enrolled in Medicare?

Yes. Nathaniel Grassi is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Nathaniel Grassi was last updated on April 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.