Lewis Gamarra, M.D.

NPI 1124048608ActiveIndividual· Hospitalist· Emeryville, CA

Hospitalist (M.D.) in Emeryville, California, trained at Medical College of Wisconsin (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $404,303 for 4,842 claims, against $179,508 paid for services in 2024. Eisai Inc. was the largest of 3 companies reporting payments in 2025, $396.29 in all, mostly food and beverage.

Overview

NPI	1124048608
Status	Active
Entity type	Individual
Credential	M.D.
Sole proprietor	Yes
NPI issued	Jul 20, 2006
Last updated in NPPES	Jan 11, 2023
Certified by provider	Jan 11, 2023

Specialties and licenses

Taxonomy	Code	License	State
Hospitalist Primary	208M00000X	G70417	CA
Internal Medicine	207R00000X	G70417	CA
Hospitalist	208M00000X	70417	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 - Hospitalist (CA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	370
Services billed	2,535 across 54 procedure codes
Paid by Medicare	$179,508

Part D prescriptions in 2024

Prescriptions (claims)	4,842 · 10,534 30-day fills
Patients	269
Total drug cost	$404,303
Generic share	87% of claims

Medicare sources and data years

Education and affiliations

Medical school	Medical College of Wisconsin
Graduation year	1988
Medicare specialty	Hospitalist
Secondary specialties	Internal Medicine
Telehealth	Offers telehealth