Boris D. Ratiner, M.D.

NPI 1821001496ActiveIndividual· Internal Medicine, Rheumatology· Tarzana, CA

Internal Medicine, Rheumatology (M.D.) in Tarzana, California, trained at Louisiana State University School of Medicine in New Orleans (class of 1994). Their prescriptions cost Medicare Part D more than their services did: $3,146,294 for 2,107 claims, against $1,871,734 paid for services in 2024. Amgen Inc. was the largest of 22 companies reporting payments in 2025, $4,686 in all, mostly food and beverage.

Overview

NPI	1821001496
Status	Active
Entity type	Individual
Credential	M.D.
Sole proprietor	No
NPI issued	Aug 14, 2006
Last updated in NPPES	Jan 9, 2023
Certified by provider	Jan 9, 2023

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Rheumatology Primary	207RR0500X	A60202	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 - Rheumatology (CA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	746
Services billed	138,991 across 137 procedure codes
Paid by Medicare	$1,871,734

Part D prescriptions in 2024

Prescriptions (claims)	2,107 · 3,524 30-day fills
Patients	318
Total drug cost	$3,146,294
Generic share	75% of claims

Medicare sources and data years

Education and affiliations

Medical school	Louisiana State University School of Medicine in New Orleans
Graduation year	1994
Medicare specialty	Rheumatology
Telehealth	Offers telehealth