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John Marshall King, MD

NPI 1790771269ActiveIndividual· Family Medicine· Haverhill, MA

Family Medicine (MD) in Haverhill, Massachusetts, licensed in MA, with an NPI issued in September 2005. Part D covered 44 prescriptions written in 2024, 93% of them generic. Phathom Pharmaceuticals, Inc. was the largest of 2 companies reporting payments in 2025, $42.09 in all, mostly food and beverage.

Overview

NPI1790771269
StatusActive
Entity typeIndividual
CredentialMD
Sole proprietorNo
NPI issuedSep 21, 2005
Last updated in NPPESApr 24, 2020
Certified by providerApr 24, 2020

Specialties and licenses

TaxonomyCodeLicenseState
Family Medicine Primary207Q00000X215349MA

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 - Family Practice (KY); Practitioner - Family Practice (MA)

Part D prescriptions in 2024

Prescriptions (claims)44 · 48 30-day fills
Patients25
Total drug cost$1,116
Generic share93% of claims

Medicare sources and data years

Industry payments (Open Payments)

  • 2025$42.09 · 3 payments from 2 companies
  • 2024$16.65 · 1 payment from 1 company

Top paying companies in 2025

CompanyAmountPayments
Phathom Pharmaceuticals, Inc.$21.752
Novo Nordisk Inc$20.341

What the 2025 payments were for

  • Food and Beverage$42.09 · 3 payments

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

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