Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Jason Polatnick, M.D.

Internal Medicine Physician in West Hartford, CT · enumerated 2006.

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

National Provider Identifier

1376562090

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mark Jason Polatnick

Credential M.D.

Sex Male

Practice address 41 N Main St, Suite 300, West Hartford, CT, 06107

Phone (860) 313-0448

Fax (860) 313-1464

Enumeration date Jul 19, 2006

Last updated in NPPES Jun 21, 2021

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 038683 (CT) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
010038683CT02	Other	CT	ANTHEM BLUE SHIELD
3V0199	Other	-	HEALTHNET
1376562090	Medicaid	CT	-

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

What is the NPI number for Mark Polatnick?

The National Provider Identifier (NPI) for Mark Polatnick is 1376562090, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Polatnick practice?

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

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-21.