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Mark J. Marshall, D.O.

NPI 1326197963ActiveIndividual· Internal Medicine· Sharon, CT

Internal Medicine (D.O.) with Nuvance Health Medical Practice PC, practicing in Sharon, Connecticut. In 2024 Medicare paid $21,304 for 130 patients, and Part D covered 108 of their prescriptions, 89% of them generic. Lists Sharon Hospital as a hospital affiliation.

Overview

NPI1326197963
StatusActive
Entity typeIndividual
CredentialD.O.
Sole proprietorNo
NPI issuedJan 10, 2007
Last updated in NPPESJul 8, 2007

Specialties and licenses

TaxonomyCodeLicenseState
Internal Medicine Primary207R00000X000529CT
Internal Medicine207R00000X203678NY

About license numbers in NPPES

Exclusion screening

ListResultDetails
HHS-OIG LEIE · Oct 9, 2026No matchChecked by NPI and by name + state
North Carolina Medicaid · Nov 10, 2026No match—
New York OMIG · Nov 10, 2026No match—
Ohio Medicaid · Nov 10, 2026No match—
Pennsylvania Medicheck · Nov 10, 2026No match—
Washington HCA · Nov 10, 2026No match—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)Enrolled Practitioner - Internal Medicine (CT)
Accepts assignmentYes (participating)

Medicare services in 2024

Medicare patients130
Services billed232 across 10 procedure codes
Paid by Medicare$21,304

Part D prescriptions in 2024

Prescriptions (claims)108 · 119 30-day fills
Patients45
Total drug cost$7,710
Generic share89% of claims

Medicare sources and data years

Education and affiliations

Graduation year2009
Medicare specialtyInternal Medicine

Medical group

Hospital affiliation

Other facilities

Source: CMS Care Compare

Industry payments (Open Payments)

None reported for 2025 or 2024.

Receiving payments does not imply wrongdoing. What Open Payments covers ·original records

Other Internal Medicine providers in Sharon

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