G0659 Medicaid reimbursement rate by state (2026)

• Order. States are listed from the highest published rate to the lowest. A like-for-like rank only counts states that use the same unit: 25 of the 25 states publish G0659 per day, enough to rank them against each other.
• Medicaid rate. The most the state's fee-for-service program pays for one unit, as published. 4 of the 25 states list more than one rate for G0659, by modifier, provider type or setting; the table shows the one that matches the provider level and setting used across states, without add-ons.
• Unit. All 25 states publish G0659 per day, so the amounts compare directly.
• Per hour. G0659 is not billed in time units in these states, so no hourly figure is shown.
• Managed-care plans. The rule the state sets for its plans on this rate. What each rule means is explained below.
• % of Medicare. No Medicare physician fee schedule amount is on file for G0659, so there is no percentage.
• Source and date. Each Source link opens the state's own document; “since” is the date the rate took effect.

Published rates for G0659 run from $10.00 in Kansas to $67.11 in Texas, a 6.7x gap in the same unit. Half the states pay more than the median of $60.59 per day and half pay less. The usual reasons for a spread like this in lab & pathology rates:

• Fees for newer molecular and genetic tests are often set case by case, so fewer states publish them and the published amounts spread widely.
• Some states bundle certain tests into panels or into facility payments, so the separately billable amount differs.
• Pathology services with an interpretation have professional and technical components that states price separately.

Timing matters too. 2 states set the current rate for G0659 in 2026 or later, while 13 states still pay a rate that took effect in 2022 or earlier. A state that has not updated its rate in years will drift down the ranking as others raise theirs.

Most Medicaid members are in managed-care plans, and plans don't publish their provider fee schedules. For G0659, the public signal is the rule each state sets for its plans, recorded on each rate above.

In 4 states, the published rate binds plans: a floor, a pass-through or a state-set rate. In 14 states, plans negotiate and the published rate is a benchmark or out-of-network default. The rule for the remaining 7 states is not classified yet.

• Plans negotiate; the published rate applies out of network (14 states). In-network rates can be above or below the published rate. The published rate is the benchmark both sides know, and the fallback if no contract is signed.
• Plans must pay at least the published rate (4 states). The published rate is your floor. Negotiate up from it, and if a plan pays less, the contract provision is the basis for a payment dispute.

Plan-negotiated rates are never estimated here. To see the rule and its citation for a particular state, open that state's managed-care page, for example Texas managed care.

G0659 is a HCPCS Level II professional services code in the lab & pathology line, billed mostly by independent laboratories, hospital labs and pathology groups. G codes describe professional services and procedures that have no CPT code, or that payers define more narrowly. Many are timed, so check the unit before comparing.

Laboratory tests are billed per test, and a panel is paid as a single code rather than as the sum of its component tests. Pathology interpretation can be billed with modifier 26 when the laboratory and the pathologist bill separately.

Before billing, confirm the rate, unit and any modifier with the state's current schedule or the plan: the amounts here are as published, not a guarantee of payment.