Yashaar Chaichian, MD

NPI 1174788103ActiveIndividual· Internal Medicine, Rheumatology· Stanford, CA

Internal Medicine, Rheumatology (MD) in Stanford, California, trained at University of Iowa, Rj & L Carver College of Medicine (class of 2008). Their prescriptions cost Medicare Part D more than their services did: $1,457,487 for 868 claims, against $83,930 paid for services in 2024. Glaxosmithkline, LLC. reported $1,125 in payments in 2024, mostly travel and lodging.

Overview

NPI	1174788103
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Jul 18, 2008
Last updated in NPPES	Apr 16, 2024
Certified by provider	Apr 16, 2024

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Rheumatology Primary	207RR0500X	A136358	CA
Internal Medicine	207R00000X	A136358	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	259
Services billed	1,028 across 11 procedure codes
Paid by Medicare	$83,930

Part D prescriptions in 2024

Prescriptions (claims)	868 · 1,739 30-day fills
Patients	171
Total drug cost	$1,457,487
Generic share	76% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of Iowa, Rj & L Carver College of Medicine
Graduation year	2008
Medicare specialty	Rheumatology
Secondary specialties	Internal Medicine
Telehealth	Offers telehealth