Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

River Valley Infectious Disease Specialists Inc.

Infectious Disease Physician in Newburyport, MA · enumerated 2012 · authorized official Joseph Gross, Owner.

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

National Provider Identifier

1366712002

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Registry record

Entity type Organization (Type 2)

Legal business name River Valley Infectious Disease Specialists Inc.

Practice address 21 Highland Ave, Suite 5, Newburyport, MA, 01950

Phone (978) 499-3810

Fax (978) 462-2316

Enumeration date Jan 11, 2012

Last updated in NPPES Sep 7, 2017

Taxonomy & classification

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 224290 (MA) Primary

Authorized official

Name Joseph Gross

Title Owner

Phone (978) 499-3810

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 is River Valley Infectious Disease Specialists Inc. located?

The practice location on file with NPPES is in Newburyport, MA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2017-09-07. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-09-07.