RCM Billing MCP — Lite (Free)

A free Claude MCP server for medical billers. Decode any denial code from an 835/ERA remittance in seconds — no tab-switching, no manual lookup.

Tools

decode_denial

Decode any CARC + RARC + group code combination.

Returns:

• Full CARC and RARC descriptions
• Plain-English translation of what the denial means
• Root cause category (coding error / eligibility / timely filing / medical necessity / duplicate / auth)
• Suggested next action (rebill / appeal / write off / correct and resubmit / call payer)

Example:

decode_denial(carc_code="CO-4", rarc_code="N30")

get_pos_description

Look up any Place of Service code — name, description, billing implications, and common errors.

Example:

get_pos_description(pos_code="11")

Why free?

These two tools handle the most common daily billing question: "What does this denial code mean and what do I do next?" They're free so you can try them without commitment.

For the full 10-tool suite — claim line validation, LCD/NCD coverage check, NPI verification, timely filing calculator, modifier combination analysis, and full denial triage with pre-written appeal language — see the RCM Billing MCP Full Suite ($29/mo).

Deploy (Railway)

railway login
railway new
railway up

No environment variables required — this server needs no auth token.

Data Sources

• X12 CARC/RARC codes (embedded, updated 3x/year)
• CMS Place of Service codes (embedded)
• No PHI handled — operates on claim metadata only (codes, not patient data)