NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Digestive Disease Associates

Specialist in New London, CT · enumerated 2007 · authorized official Alan Greenwald, President.

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

National Provider Identifier

1720273741

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Digestive Disease Associates
Practice address 268 Montauk Ave, New London, CT, 06320
Fax (860) 447-3169
Enumeration date Sep 12, 2007
Last updated in NPPES Sep 12, 2007

Taxonomy & classification

174400000X Specialist Other Service Providers · License 021951 (CT) Primary

Authorized official

Name Alan Greenwald
Title President

Other identifiers

Identifier Type State Issuer
1219518 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Who is the authorized official for Digestive Disease Associates?
NPPES lists Alan Greenwald (President) as the authorized official for this organization.
What is the NPI number for Digestive Disease Associates?
The NPI for Digestive Disease Associates is 1720273741, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-09-12.