Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Mark R Chasse, OD

Q: What is the NPI number for Mark Chasse?

The National Provider Identifier (NPI) for Mark Chasse is 1699742429, a Type 1 (individual) record in the CMS NPPES registry.

Optometrist in Cromwell, CT · enumerated 2006.

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

National Provider Identifier

1699742429

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark R Chasse

Credential OD

Sex Male

Practice address Cromwell, CT, 06416

Phone (860) 635-6149

Fax (860) 632-1401

Enumeration date Mar 1, 2006

Last updated in NPPES Sep 10, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 939 (CT) Primary

152W00000X Optometrist Eye and Vision Services Providers · License 2893 (MA) Secondary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier	Type	State	Issuer
4275439	Other	-	AETNA
C01952	Other	-	MEDICARE
090000939CT01	Other	-	BLUE CROSS

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 does Mark Chasse practice?

The practice location on file with NPPES is in Cromwell, CT. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Mark Chasse?

The National Provider Identifier (NPI) for Mark Chasse is 1699742429, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-09-10.