Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Exosome Diagnostics, Inc.

Clinical Medical Laboratory in Waltham, MA · enumerated 2015 · authorized official William Kelly, Chief Financial Officer.

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

National Provider Identifier

1538543731

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Registry record

Entity type Organization (Type 2)

Legal business name Exosome Diagnostics, Inc.

Practice address 266 2nd Ave # 200, Waltham, MA, 02451

Phone (617) 588-0500

Fax (617) 588-0580

Enumeration date Jul 17, 2015

Last updated in NPPES Jul 21, 2022

Taxonomy & classification

291U00000X Clinical Medical Laboratory Laboratories Primary

Authorized official

Name William Kelly

Title Chief Financial Officer

Phone (617) 588-0522

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2022-07-21. Verify at npiregistry.cms.hhs.gov.

Where is Exosome Diagnostics, Inc. located?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.