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Your first biller is the highest-leverage non-clinical hire you will make. They convert delivered care into collected money, and the difference between a good one and an adequate one is measured in percentage points of net collection rate.

Prerequisites

  • Your EHR and clearinghouse selected
  • A decision that in-house is right — see In-house vs outsourced RCM
  • The MSO registered as an employer in that state
The biller is an MSO employee. The MSO employs non-clinical staff; the PC employs clinicians. But coding responsibility rests with the PC — the biller operates the workflow and may hold a coding credential, and the clinician retains authority over what codes are assigned. Document this in the MSA. See What an MSO can and can’t do.

Define the role

At a single-biller practice, the role spans the whole cycle: Be explicit about what is not in the role — clinical coding decisions, contract negotiation, credentialing (unless you’re combining roles deliberately).

Certifications that signal competence

Certification is a signal, not a substitute for experience. Specialty experience matters more than any credential — a biller who has worked your specialty knows its payer quirks, its common denials, and its modifier patterns.

The interview exercise that works

Hand the candidate a redacted 835 containing a CO-45, a PR-2, a CO-197 denial, and a PLB takeback. Ask them to walk you through it. You are listening for: A candidate who handles that fluently can do the job. One who cannot will cost more than their salary in missed patient balances and unworked denials. A second exercise: give them a claim that rejected at 277CA and ask how they’d diagnose it. You want to hear them distinguish a rejection from a denial without being prompted.

Compensation

Highly market-dependent. Directional ranges for a single experienced biller in a small practice: Add 20–30% for benefits and payroll taxes to get loaded cost. Adjust substantially for high-cost metros and for remote hiring.
Do not tie billing compensation to collections in a way that rewards aggressive coding. A bonus on clean claim rate, days in AR, or denial rate is fine. A bonus on total collections creates pressure on the exact judgment you want insulated. See Billing compliance basics.

How many billers

Directional heuristics, heavily specialty-dependent: Better than any ratio: measure the work. If claims go out same-day, rejections are worked same-day, the denial queue has nothing over 14 days, and AR is stable, you have enough. If any of those slips, you don’t.

Steps

1

Write the role description with the phase table above

2

Source for specialty experience first, certification second

3

Screen on the 835 exercise

Do this early. It eliminates candidates faster and more reliably than a resume review.
4

Check references on specifics

“What was their clean claim rate?” and “how did they handle the denial queue?” rather than “were they good?”
5

Set up the daily and weekly checklists before they start

6

Define the escalation path for documentation concerns

Your biller must be able to raise a documentation or coding concern to a clinician without going through MSO operations. This is both a compliance control and the mechanism by which a concerned employee raises an issue internally rather than becoming a qui tam relator. See Billing compliance basics.
7

Plan for coverage

A single biller is a single point of failure. Cross-train someone, or arrange overflow support before you need it.

Verify it worked

  • Role description written and scoped
  • Candidate screened on the 835 exercise
  • Specialty experience verified with references
  • Employed by the MSO, with the state registration in place
  • Compensation not tied to collections volume in a way that pressures coding
  • Daily and weekly checklists in place before day one
  • Escalation path to a clinician defined
  • Coverage plan for absence

Common failure modes