Gregory Bion Bierer, MD

NPI 1154489433ActiveIndividual· Internal Medicine, Pulmonary Disease· Santa Monica, CA

Internal Medicine, Pulmonary Disease (MD) in Santa Monica, California, trained at New York Medical College (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $455,799 for 1,644 claims, against $73,939 paid for services in 2024. Astrazeneca Pharmaceuticals LP reported $104.29 in payments in 2024, mostly food and beverage.

Overview

NPI	1154489433
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Dec 5, 2006
Last updated in NPPES	Jan 7, 2020
Certified by provider	Jan 7, 2020

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Pulmonary Disease Primary	207RP1001X	A77403	CA
Internal Medicine	207R00000X	A77403	CA
Internal Medicine, Critical Care Medicine	207RC0200X	A77403	CA
Internal Medicine, Sleep Medicine	207RS0012X	A77403	CA

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 4, 2026	No match	—
New York OMIG · Nov 4, 2026	No match	—
Ohio Medicaid · Nov 4, 2026	No match	—
Pennsylvania Medicheck · Nov 4, 2026	No match	—
Washington HCA · Nov 4, 2026	No match	—

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

Medicare

Enrollment (PECOS)	Enrolled Practitioner - Pulmonary Disease (CA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	674
Services billed	1,616 across 27 procedure codes
Paid by Medicare	$73,939

Part D prescriptions in 2024

Prescriptions (claims)	1,644 · 2,268 30-day fills
Patients	246
Total drug cost	$455,799
Generic share	48% of claims

Medicare sources and data years

Education and affiliations

Medical school	New York Medical College
Graduation year	2000
Medicare specialty	Pulmonary Disease
Secondary specialties	Internal Medicine
Telehealth	Offers telehealth