Paul R. Mercer, M.D.

NPI 1649224098ActiveIndividual· Family Medicine· Whittier, CA

Family Medicine (M.D.) in Whittier, California, trained at University of Southern California Keck School of Medicine (class of 1994). Their prescriptions cost Medicare Part D more than their services did: $501,065 for 8,131 claims, against $21,438 paid for services in 2024. Lilly USA, LLC was the largest of 5 companies reporting payments in 2025, $206.31 in all, mostly food and beverage.

Overview

NPI	1649224098
Status	Active
Entity type	Individual
Credential	M.D.
Sole proprietor	Yes
NPI issued	May 20, 2006
Last updated in NPPES	Jul 22, 2019

Specialties and licenses

Taxonomy	Code	License	State
Family Medicine Primary	207Q00000X	A55020	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 - Family Practice (CA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	86
Services billed	1,499 across 25 procedure codes
Paid by Medicare	$21,438

Part D prescriptions in 2024

Prescriptions (claims)	8,131 · 17,861 30-day fills
Patients	585
Total drug cost	$501,065
Generic share	90% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of Southern California Keck School of Medicine
Graduation year	1994
Medicare specialty	Family Practice
Telehealth	Offers telehealth