John Michael Costable Jr., MD

NPI 1043251184ActiveIndividual· Internal Medicine, Gastroenterology· Great Neck, NY

Internal Medicine, Gastroenterology (MD) in Great Neck, New York, trained at State University of New York at Stony Brook, School of Medicine (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $682,301 for 1,866 claims, against $145,175 paid for services in 2024. Madrigal Pharmaceuticals was the largest of 3 companies reporting payments in 2025, $298.39 in all, mostly food and beverage.

Overview

NPI	1043251184
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Jun 9, 2006
Last updated in NPPES	Jul 13, 2026

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Gastroenterology Primary	207RG0100X	198554	NY

About license numbers in NPPES

Exclusion screening

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

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

Medicare

Enrollment (PECOS)	Enrolled Practitioner - Gastroenterology (NY)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	431
Services billed	938 across 20 procedure codes
Paid by Medicare	$145,175

Part D prescriptions in 2024

Prescriptions (claims)	1,866 · 2,941 30-day fills
Patients	479
Total drug cost	$682,301
Generic share	81% of claims

Medicare sources and data years

Education and affiliations

Medical school	State University of New York at Stony Brook, School of Medicine
Graduation year	1992
Medicare specialty	Gastroenterology
Secondary specialties	Internal Medicine