Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Cynthia Kline O'Sullivan, APRN

Family Nurse Practitioner in Madison, CT · enumerated 2017.

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

National Provider Identifier

1447769468

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Cynthia Kline O'Sullivan

Credential APRN

Sex Female

Practice address 30 Highview Rd, Madison, CT, 06443

Phone (203) 216-2945

Enumeration date Sep 21, 2017

Last updated in NPPES May 27, 2021

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 7030 (CT) Primary

APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN credential

Other identifiers

Identifier	Type	State	Issuer
12.007030	Other	CT	APRN LICENSE NUMBER

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 Cynthia O'Sullivan?

The National Provider Identifier (NPI) for Cynthia O'Sullivan is 1447769468, a Type 1 (individual) record in the CMS NPPES registry.

Where does Cynthia O'Sullivan practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-05-27.