Nimisha Parekh, MD

NPI 1740397421ActiveIndividual· Internal Medicine, Gastroenterology· Orange, CA

Internal Medicine, Gastroenterology (MD) in Orange, California, trained at Tulane University School of Medicine (class of 1998). Their prescriptions cost Medicare Part D more than their services did: $1,942,712 for 523 claims, against $19,600 paid for services in 2024. Celltrion USA Inc. was the largest of 4 companies reporting payments in 2025, $4,119 in all, mostly consulting fees.

Overview

NPI	1740397421
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Aug 25, 2006
Last updated in NPPES	Jul 8, 2007

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Gastroenterology Primary	207RG0100X	A96159	CA

About license numbers in NPPES

Exclusion screening

List	Result	Details
HHS-OIG LEIE · Nov 10, 2026	No match	Checked by NPI and by name + state
North Carolina Medicaid · Nov 11, 2026	No match	—
New York OMIG · Nov 11, 2026	No match	—
Ohio Medicaid · Nov 11, 2026	No match	—
Pennsylvania Medicheck · Nov 11, 2026	No match	—
Washington HCA · Nov 11, 2026	No match	—

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

Medicare

Enrollment (PECOS)	Enrolled Practitioner - Internal Medicine (CA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	108
Services billed	230 across 26 procedure codes
Paid by Medicare	$19,600

Part D prescriptions in 2024

Prescriptions (claims)	523 · 861 30-day fills
Patients	95
Total drug cost	$1,942,712
Generic share	64% of claims

Medicare sources and data years

Education and affiliations

Medical school	Tulane University School of Medicine
Graduation year	1998
Medicare specialty	Internal Medicine
Secondary specialties	Gastroenterology
Telehealth	Offers telehealth