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Billing code G0475 · Physician & professional

G0475 Medicaid reimbursement rate by state (2026)

Hiv antigen/antibody, combination assay, screening. Medicaid pays a median of $23.60 for G0475 across 23 states, from $3.03 in Kansas to $36.12 in New Mexico.

Data as of Oct 5, 202623 statesEvery rate links to its official source

States publishing
23
National median
$23.60units vary by state
Lowest
$3.03Kansas
Highest
$36.12New Mexico
Answer

What does Medicaid pay for G0475?

23 state Medicaid programs publish a fee-for-service rate for G0475. The national median is $23.60 (units differ between states). New Mexico pays the most, $36.12, and Kansas the least, $3.03, a 11.9x spread.

State ranking

G0475 rate by state: highest, middle and lowest

One like-for-like fee-for-service rate per state, ranked. The workspace lists all 23 states with every variant, modifier and effective date.

#StateMedicaid rateUnitPer hourManaged-care plans% of Medicare
1New Mexico Source · since 2025-01-01$36.12——Plans must pay at least this—
2Georgia Source · since 2018-10-01$26.42——Plans negotiate; applies out of network—
3Texas Source · since 2026-09-01$26.01——Plans negotiate; applies out of network—
11Montana Source · since 2020-01-01$24.07——Not classified—
12Delaware Source · since 2024-01-01$23.60——Plans negotiate; applies out of network—
13Vermont Source · since 2025-01-01$23.48——Not classified—
22District of Columbia Source · since 2020-04-01$19.26——Not classified—
23Kansas Source · since 2016-01-01$3.03——Not classified—
See all 23 states for G0475 — start free

15 more states, with every modifier and provider-type variant, rate history and the plan rule in each state. 14-day free trial, no credit card.

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Rates are per the unit shown for each state; units can differ between states. Medicare amounts are computed from the CMS relative value file and locality cost indices; states with several Medicare localities show a range. Confirm rates with the payer before billing.

Track G0475 in your states. Get an alert when any state changes it, with every variant and the managed-care rule.
Guide

How to read this table

  • Order. States are listed from the highest published rate to the lowest. No single unit is shared by 8 or more states for G0475, 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. 9 of the 23 states list more than one rate for G0475, 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. None of the 23 schedules prints a separate unit for G0475, so each amount is a flat payment for one service as the code defines it.
  • Per hour. G0475 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 G0475, 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.
Context

Why G0475 rates differ between states

Published rates for G0475 run from $3.03 in Kansas to $36.12 in New Mexico, a 11.9x gap in the same unit. Half the states pay more than the median of $23.60 and half pay less. The usual reasons for a spread like this in physician & professional rates:

  • 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.
  • 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.
  • Modifiers such as professional or technical component, bilateral, multiple procedure and assistant at surgery change the amount paid, and states apply them with their own percentages.

Timing matters too. 6 states set the current rate for G0475 in 2026 or later, while 10 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.

Managed care

What managed-care plans pay for G0475

Most Medicaid members are in managed-care plans, and plans don't publish their provider fee schedules. For G0475, the public signal is the rule each state sets for its plans, recorded on each rate above.

In 2 states, the published rate binds plans: a floor, a pass-through or a state-set rate. In 12 states, plans negotiate and the published rate is a benchmark or out-of-network default. The rule for the remaining 9 states is not classified yet.

  • Plans negotiate; the published rate applies out of network (12 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 (2 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 New Mexico managed care.

Billing

Units and billing for G0475

G0475 is a HCPCS Level II professional services code in the physician & professional line, billed mostly by physicians, nurse practitioners, physician assistants and other licensed practitioners. 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.

Practitioners who are not physicians are often paid a reduced percentage of the published amount, so check the schedule for the reduction that applies to your provider type. 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.

FAQ

Frequently asked questions

What does Medicaid pay for G0475?

It depends on the state. Of the 23 states with a published fee-for-service rate, the median is $23.60. New Mexico pays the most ($36.12) and Kansas the least ($3.03).

Which state pays the highest Medicaid rate for G0475?

New Mexico, at $36.12, effective 2025-01-01.

Which state pays the lowest Medicaid rate for G0475?

Kansas, at $3.03, effective 2016-01-01.

What unit is G0475 billed in?

None of the 23 schedules prints a separate unit for G0475, so each amount is a flat payment for one service as the code defines it.

Do managed-care plans pay the same rate for G0475?

Not necessarily. In 2 states, the published rate binds plans: a floor, a pass-through or a state-set rate. In 12 states, plans negotiate and the published rate is a benchmark or out-of-network default. The rule for the remaining 9 states is not classified yet. Each rule is cited to the plan contract, statute or notice in the workspace.