Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Cynthia Alder Treacy, P.A.

Medical Physician Assistant in Greenwich, CT · enumerated 2007.

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

National Provider Identifier

1588799399

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Cynthia Alder Treacy

Credential P.A.

Sex Female

Practice address 75 Holly Hill Ln, Greenwich, CT, 06830

Phone (203) 869-6960

Enumeration date Feb 22, 2007

Last updated in NPPES Sep 7, 2016

Taxonomy & licenses

363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers Primary

PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program. About the PA credential

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

Where does Cynthia Treacy practice?

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

What is the NPI number for Cynthia Treacy?

The National Provider Identifier (NPI) for Cynthia Treacy is 1588799399, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-09-07.