31551 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 31551, 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. 31 of the 50 states list more than one rate for 31551, 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 50 states, 2 publish 31551 per unit, and 48 schedules print no unit at all (a flat amount per service).
• Per hour. 31551 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 31551, 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 31551 run from $210.22 in Rhode Island to $2,385.13 in Alaska, a 11.3x gap in the same unit. Half the states pay more than the median of $1,159.51 and half pay less. The usual reasons for a spread like this in physician & professional rates:

• 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.
• 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.

Timing matters too. 32 states set the current rate for 31551 in 2026 or later, while 8 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.

What a plan pays for 31551 is negotiated privately, but the state decides how much room there is to negotiate. Here is how the rules break down across the 50 states.

In 11 states, the published rate binds plans: a floor, a pass-through or a state-set rate. In 25 states, plans negotiate and the published rate is a benchmark or out-of-network default. The rule for the remaining 14 states is not classified yet.

• Plans negotiate; the published rate applies out of network (25 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 (11 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 Alaska managed care.

31551 is a CPT surgery code in the physician & professional line, billed mostly by physicians, nurse practitioners, physician assistants and other licensed practitioners. Surgical codes are paid once per procedure. The fee can include a global period of related care before and after the procedure, and modifiers for multiple, bilateral or assistant procedures raise or reduce what is actually paid.

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

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.