Missouri emergency department billing services
Professional ER billing for emergency medicine groups in Missouri: MDM-based 99281-99285 levels, critical care time, modifier 25, payer enrollment and No Surprises Act claims, built on the Missouri payer rules verified below.
What changes an ER claim in Missouri.
Every Missouri rule on file, each linked to its primary source: state surprise-billing law, Medicaid ER policy, Medicaid managed care, the Blue plan and the Medicare contractor.
| Rule type | Date | What it says | Source |
|---|---|---|---|
| State surprise-billing law | Aug 2019 | Missouri RSMo 376.690: for ER care by out-of-network professionals at in-network facilities, bill the carrier within 180 days; carrier offers reasonable payment within 45 processing days; 60-day negotiation, then state arbitration (notice within 120 days). | Source |
| Medicaid managed care | Sep 2026 | Home State Health (MO HealthNet MCO): from 15 Sep 2026 ED facility E/M leveling moves from Optum EDC to Cotiviti pre-payment review with nurse review and a Level 3 (99283) floor. Facility UB-04 claims only; no change to physician professional E/M coding. | Source |
| Medicare contractor | Sep 2019 | Medicare Part B ER professional claims in Missouri go to Wisconsin Physicians Service (WPS), Jurisdiction 5 (J5). | Source |
How we bill Missouri ER visits.
The same four-step workflow we run for emergency medicine and hospitalist groups billing from their hospital system.
Hospital feed and registration
Demographics, insurance and the attending physician arrive from the hospital system daily. Gaps go back to registration as clarification requests, not guesses.
MDM levels and critical care minutes
ED visits 99281-99285 are coded on medical decision making only. Critical care is 99291 for 30 to 74 minutes and 99292 from 104 total minutes, on documented time.
Modifier 25 and enrollment check
A separately identifiable E/M on the day of a procedure carries modifier 25 with its own documentation. The rendering physician is checked against the payer roster before release.
Submission, remit and NSA/IDR
Professional claims go out with place of service 23. Out-of-network ER claims follow the No Surprises Act: in-network cost share only, open negotiation, then federal IDR.
FAQ: ER billing in Missouri.
Does Missouri have a state surprise billing law for ER care?
Missouri RSMo 376.690: for ER care by out-of-network professionals at in-network facilities, bill the carrier within 180 days; carrier offers reasonable payment within 45 processing days; 60-day negotiation, then state arbitration (notice within 120 days).
How do Missouri Medicaid managed care plans handle ER claims?
Home State Health (MO HealthNet MCO): from 15 Sep 2026 ED facility E/M leveling moves from Optum EDC to Cotiviti pre-payment review with nurse review and a Level 3 (99283) floor. Facility UB-04 claims only; no change to physician professional E/M coding.
Which Medicare contractor processes Missouri ER professional claims?
Medicare Part B ER professional claims in Missouri go to Wisconsin Physicians Service (WPS), Jurisdiction 5 (J5).
How are emergency department visit levels chosen in Missouri?
By medical decision making only. CMS states that for emergency department visits practitioners use MDM, not time, to select 99281-99285, so the note must carry the problems addressed, the data reviewed and the risk of management.
Can an out-of-network ER physician in Missouri bill the patient for the balance?
Not for covered emergency services. Under the federal No Surprises Act, out-of-network providers of emergency services cannot bill the patient more than in-network cost sharing, and the notice-and-consent exception does not apply to emergency medicine.
Nearby ER billing state guides.
Neighbouring state pages with their own verified ER payer rules.