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Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Ronald Hirokawa, MD

Otolaryngology Physician in New Haven, CT · enumerated 2023 · authorized official Elizabeth Sullivan, Practice Manager.

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

National Provider Identifier

1912612318

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Registry record

Entity type Organization (Type 2)
Legal business name Ronald Hirokawa, MD
Parent organization Ronald Hirokawa, MD
Practice address One Long Wharf Drive, Suite 302, New Haven, CT, 06511
Phone (203) 777-7500
Fax (203) 777-8469
Enumeration date Jan 19, 2023
Last updated in NPPES Jan 19, 2023

Taxonomy & classification

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Elizabeth Sullivan
Title Practice Manager
Phone (203) 777-7500

Other identifiers

Identifier Type State Issuer
001259142 Medicaid CT -

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.

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Frequently asked questions

What is the NPI number for Ronald Hirokawa, MD?
The NPI for Ronald Hirokawa, MD is 1912612318, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Ronald Hirokawa, MD?
NPPES lists Elizabeth Sullivan (Practice Manager) as the authorized official for this organization.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-19.