Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ralph Anthony Antonacci Jr., MSPT, ATC, CSCS

Athletic Trainer in Norwalk, CT · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1447271846

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Registry record

Entity type Individual (Type 1)

Name Ralph Anthony Antonacci Jr.

Credential MSPT, ATC, CSCS

Sex Male

Practice address 650 West Ave, Norwalk, CT, 06850

Phone (203) 852-9903

Fax (203) 354-2983

Enumeration date Jul 21, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 005212 (CT) Secondary

2255A2300X Athletic Trainer Respiratory, Developmental, Rehabilitative and Restorative Service Providers Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Ralph Antonacci?

The National Provider Identifier (NPI) for Ralph Antonacci is 1447271846, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ralph Antonacci practice?

The practice location on file with NPPES is in Norwalk, CT. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Christopher Antonacci Physical Therapist · Norwalk, CT NPI 1710919022 Jaime Young Athletic Trainer · Norwalk, CT NPI 1396760377 John Meehan Physical Therapist · Norwalk, CT NPI 1134207012 Keenan Russell & Moore Inc Optician · Norwalk, CT NPI 1467510727 Dann Hearing Aid Center, LLC Hearing Instrument Specialist · Norwalk, CT NPI 1013263698 Elizabeth Semenyck Marriage & Family Therapist · Norwalk, CT NPI 1851006290 Anna Chieffalo Hearing Instrument Specialist · Norwalk, CT NPI 1912769746

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.