Howard Hao Zhang, M.D.

NPI 1851302863ActiveIndividual· Internal Medicine, Gastroenterology· Montgomery, OH

Internal Medicine, Gastroenterology (M.D.) in Montgomery, Ohio, trained at Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $300,750 for 1,030 claims, against $86,763 paid for services in 2024. Abbvie Inc. was the largest of 18 companies reporting payments in 2025, $3,291 in all, mostly food and beverage.

Overview

NPI	1851302863
Status	Active
Entity type	Individual
Credential	M.D.
Sole proprietor	No
NPI issued	Aug 11, 2006
Last updated in NPPES	Nov 15, 2021
Certified by provider	Nov 15, 2021

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Gastroenterology Primary	207RG0100X	35-087915	OH

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 (OH)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	411
Services billed	873 across 35 procedure codes
Paid by Medicare	$86,763

Part D prescriptions in 2024

Prescriptions (claims)	1,030 · 1,218 30-day fills
Patients	501
Total drug cost	$300,750
Generic share	88% of claims

Medicare sources and data years

Education and affiliations

Medical school	Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University
Graduation year	2000
Medicare specialty	Gastroenterology
Secondary specialties	Internal Medicine