Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Sema4 Opco, Inc

Clinical Medical Laboratory in Stamford, CT · enumerated 2021 · authorized official Danielle Watimar, Payor Analyst.

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

National Provider Identifier

1902474653

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Registry record

Entity type Organization (Type 2)

Legal business name Sema4 Opco, Inc

Practice address 62 Southfield Ave, Stamford, CT, 06902

Phone (800) 298-6470

Enumeration date Jun 17, 2021

Last updated in NPPES Aug 31, 2022

Taxonomy & classification

291U00000X Clinical Medical Laboratory Laboratories Primary

Authorized official

Name Danielle Watimar

Title Payor Analyst

Phone (240) 429-3142

Other identifiers

Identifier	Type	State	Issuer
07D2180805	Other	-	CLIA

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 2022-08-31. Verify at npiregistry.cms.hhs.gov.

Where is Sema4 Opco, Inc located?

The practice location on file with NPPES is in Stamford, CT.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-31.