Medicare and Medicaid Billing, Coding, and Reimbursement
The all-inclusive encounter rate
RHCs are paid an all-inclusive rate (AIR) per qualifying visit, not fee-for-service. The AIR covers all medically necessary RHC services furnished on the same day by any RHC practitioner, including the visit, injections, and incident-to services. Candidates must know the qualifying-visit rules: a face-to-face encounter with an RHC practitioner (physician, NP, PA, CNM, CP, or CSW for mental health), the visit must be medically necessary, and the service must be within the RHC's scope. The rate is capped by the Medicare upper payment limit and adjusted for geography and the patient's status (new vs. established, and whether the patient is a Medicaid beneficiary or has another payer).
Coding and billing mechanics
Understand the role of HCPCS/CPT codes in RHC billing: RHCs report the appropriate evaluation and management code (e.g., 99213) or a preventive code to describe the visit, but payment is the AIR, not the fee schedule. The encounter must be documented to support the level of service, and the AIR is billed once per day per patient per practitioner type (with limited exceptions). Know the difference between a billable encounter and a non-billable service (e.g., a service that is bundled into the AIR or furnished by a non-RHC provider).
Traps
Frequent errors: billing the AIR for a telephone or telehealth visit without confirming the modality qualifies; double-billing the AIR when a patient is seen by both a physician and an NP on the same day; and assuming the AIR covers services from outside labs or specialists (it does not). Another trap is the Medicare/Medicaid crossover: Medicaid may pay the difference between the AIR and the Medicaid rate, but the rules differ by state.
Worked example
A patient sees an NP for a chronic-care visit and receives a flu shot the same day. The RHC bills one AIR for the visit; the vaccine is included in the AIR (with a possible vaccine-administration exception depending on the year's rules). Billing a separate E/M for the vaccine administration would be a duplicate.
Rule of thumb
One patient, one day, one practitioner type = one AIR. If you can't point to a face-to-face encounter that day, don't bill.