91320 Medicaid reimbursement rate by state (2026)

• Order. States are listed from the highest published rate to the lowest. No single unit is shared by 8 or more states for 91320, so the order is by published amount and is not a like-for-like rank.
• Medicaid rate. The most the state's fee-for-service program pays for one unit, as published. 27 of the 44 states list more than one rate for 91320, 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. Of the 44 states, 1 publish 91320 per 03 ml and 1 per unit, and 42 schedules print no unit at all (a flat amount per service).
• Per hour. 91320 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 91320, 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 91320 run from $2.67 in Washington to $230.41 in Utah, a 86.3x gap in the same unit. Half the states pay more than the median of $158.13 and half pay less. The usual reasons for a spread like this in physician & professional rates:

• Each state sets its own physician conversion factor or fee for every code, and many update them on a state budget cycle rather than on Medicare's calendar.
• Some states pay physician services as a percentage of the Medicare fee schedule; others keep a schedule of their own that may not have been rebased for years.
• Primary-care and pediatric add-ons, enhanced rates for certain specialties and targeted increases for access problems change individual codes without moving the rest of the schedule.

Timing matters too. 23 states set the current rate for 91320 in 2026 or later. A state that has not updated its rate in years will drift down the ranking as others raise theirs.

What a plan pays for 91320 is negotiated privately, but the state decides how much room there is to negotiate. Here is how the rules break down across the 44 states.

In 11 states, the published rate binds plans: a floor, a pass-through or a state-set rate. In 17 states, plans negotiate and the published rate is a benchmark or out-of-network default. In 1 state, the service is paid outside the plans or through a state-directed payment. The rule for the remaining 15 states is not classified yet.

• Plans negotiate; the published rate applies out of network (17 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 (10 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.
• Paid by the state, outside the plans (1 state). Bill the state's Medicaid program, not the plan, at the published rate. There is no plan contract to negotiate for this service.
• Plans are expected to pay at least the published rate (1 state). Treat the published rate as a strong anchor, and confirm the minimum is written into your own plan agreement.

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 Utah managed care.

91320 is a CPT medicine code in the physician & professional line, billed mostly by physicians, nurse practitioners, physician assistants and other licensed practitioners. The medicine section runs from vaccines and psychiatry to dialysis, cardiology and therapy. Some of its codes are timed in 15-minute units, others are billed once per session or per test, so the unit matters more here than in most sections.

Where a state publishes separate facility and non-facility amounts, the non-facility (office) amount is usually higher because the practice carries the overhead. Physician-fee-schedule codes are billed per service: one unit is one occurrence unless the code itself is defined by time or quantity.

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.