Chargemaster (CDM)

What exactly is a chargemaster?

The chargemaster is the master file behind every charge that hits a claim: one line per billable item, each carrying a CPT or HCPCS code, a description, revenue code where applicable, and your price. In a small practice it may be a few hundred lines inside the PM system; in a hospital it runs to tens of thousands. When a provider drops a charge in charge capture, the chargemaster is what turns "99214" into "$180.00" on the claim.

Remember what it is not: it is not what you get paid. Payment comes from each payer's fee schedule; the billed-versus-allowed gap is written off as contractual adjustment.

How should you set chargemaster prices?

The governing rule: payers pay the lesser of billed charges or the allowed amount. So every charge must clear your highest contract rate with room to spare. A common approach is pricing at a fixed multiple of Medicare — say 200% — reviewed annually.

Worked example of the failure mode: your chargemaster lists 99214 at $95, set years ago. Your best commercial contract allows $112. The payer pays the lesser of billed or allowed: $95, not $112. You just donated $17 per visit to the payer, and the ERA will not flag it — it looks like a normally paid claim. At 30 such visits a week, that single stale line costs about $26,500 a year.

What does a stale chargemaster cost?

Beyond the lesser-of trap, stale CDMs carry deleted CPT codes that reject at the clearinghouse, missing new codes that force workarounds, wrong units on drugs (a notorious audit trigger), and supply items priced below acquisition cost. CPT updates land every January with quarterly HCPCS changes, so a chargemaster untouched for two years is guaranteed to contain dead codes — each one a claim that fails before adjudication and drags down your clean-claim rate.

How do you maintain a chargemaster?

1. Annual full review — every line checked against current CPT/HCPCS validity and repriced against your highest contract rate. For Medicare-heavy code sets, the Medicare fee calculator gives you the current allowed amounts to benchmark multiples against.
2. January and quarterly code updates — add new codes, end-date deleted ones. Never hard-delete: you need history for reworking old claims.
3. Lesser-of audit — run a report of any ERA where paid equals billed. Paid-at-billed is the fingerprint of an underpriced charge line.
4. One owner — chargemaster changes should go through a single accountable person with a change log, not whoever notices a problem.