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J. Andrew Hallberg, MD, LLC

Specialist in Mystic, CT · enumerated 2007 · authorized official John Hallberg, Owner.

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

National Provider Identifier

1487770228

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Registry record

Entity type Organization (Type 2)
Legal business name J. Andrew Hallberg, MD, LLC
Practice address 56 Whitehall Ave, Suite A, Mystic, CT, 06355
Phone (860) 536-0773
Fax (860) 536-1068
Enumeration date Mar 22, 2007
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

174400000X Specialist Other Service Providers · License 029044 (CT) Primary

Authorized official

Name John Hallberg
Title Owner
Phone (860) 536-0773

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 J. Andrew Hallberg, MD, LLC?
The NPI for J. Andrew Hallberg, MD, LLC is 1487770228, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for J. Andrew Hallberg, MD, LLC?
NPPES lists John Hallberg (Owner) as the authorized official for this organization.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.