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Ongoing Blood-Thinner Management, Later Months

Washington 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 July 2026.

How much does Ongoing Blood-Thinner Management, Later Months cost?

$79.43

Typical facility fee. In Washington, July 2026.

Insurers have agreed to pay about $79.43 for this service. Most negotiated rates run $60.26 to $83.18.

These are rates insurers have negotiated with providers, not the amount a patient is billed. What you owe depends on your plan's deductible and coinsurance. Based on rates published by 3 insurance carriers under federal price transparency rules.

How much rates vary

Facilitymedian $79 · 10th to 90th $49 to $81Professionalmedian $98 · 10th to 90th $60 to $174
$50$100$200facility $79professional $98

Distribution of negotiated rates across all payers (price axis is log-scale). Each curve is scaled to its own total: facility and professional rates are different services, shown together to compare where they cluster. Small sample; interpret with caution. Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier
Cigna
Setting
Professional
Modifier
Global
Typical Low
$70.79
Median
$120.23
Typical High
$194.98
Molina
Setting
Professional
Modifier
Global
Typical Low
$60.26
Median
$70.79
Typical High
$85.11
Pacific Source
Setting
Facility
Modifier
Global
Typical Low
$48.98
Median
$79.43
Typical High
$81.28

Where Washington sits

The same service costs 4.8 times more in Tennessee than in New Hampshire. Every bar is a state, most expensive first. Touch or drag across it to read any state, then open that state for its carriers and full range.

Washington· 31st of 49

$79.43

TN $200NH $41.69

Median negotiated rate in each state, from every insurer that publishes one. States where no insurer publishes a rate for this service are not shown.