Ongoing Blood-Thinner Management, Later Months

Maryland rates for HCPCS 99364

This covers the ongoing work involved in managing a patient's warfarin (a blood-thinning medication) for each additional three-month period after the first, in the outpatient setting. It includes reviewing regular blood clotting test results, adjusting the medication dose as needed, giving the patient instructions, and ordering follow-up testing. This reflects the continued coordination needed to keep the blood-thinning level in a safe range over the long term.

Rates data updated October 2026.

How much rates vary

Professionalmedian $69 · 10th to 90th $36 to $98

Distribution of negotiated rates across all payers (price axis is log-scale). Small sample; interpret with caution. Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier	Facility/Professional	Modifier	Typical Low	Median	Typical High
Cigna Setting Professional Modifier None Typical Low $70.79 Median $89.13 Typical High $123.03	Professional	None	$70.79	$89.13	$123.03
Kaiser Permanente Setting Professional Modifier None Typical Low $36.31 Median $44.67 Typical High $74.13	Professional	None	$36.31	$44.67	$74.13