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Common HCFA errors

• Box 21 — Diagnosis codes missing or wrong ICD version
• Box 24B — POS code not matching facility type
• Box 31 — Provider signature date blank
• Box 33 — Billing provider name/address incomplete

How to fix POS Code (Box 24B)

1. Open the encounter → Visit Details
2. Set POS Code to match your facility (11 = Office, 22 = Outpatient…)
3. Save and regenerate the claim

Where in OpenEMR

Most common coding errors

• Diagnosis not linked to procedure (Box 24E)
• Invalid or expired CPT/HCPCS code
• Missing modifier when required (e.g. -25, -59)
• Units field left at zero

How to link a diagnosis to a charge

1. Open the fee sheet for the encounter
2. For each CPT line, check the diagnosis pointer boxes (A–D)
3. Select the applicable ICD-10 code(s)
4. Save and re-submit

Where in OpenEMR

Top denial reasons

• CO-4 — Modifier not valid for procedure
• CO-11 — Diagnosis inconsistent with procedure
• CO-15 — Authorization number missing
• CO-97 — Service included in global
• PR-1 — Deductible not met

Denial workflow in OpenEMR

1. Go to Billing → Billing Manager
2. Filter by Status = Denied
3. Click the claim → review ERA / EOB for remark code
4. Correct and use Re-Open to resubmit

Where in OpenEMR

Common X12 / EDI errors

• Missing or invalid submitter NPI (Loop 1000B)
• Payer ID not found — check clearinghouse payer list
• ISA/GS segment header mismatch
• 837P generated with wrong taxonomy code

Set up X12 Partner in OpenEMR

1. Go to Admin → X12 Partners
2. Enter ISA Sender/Receiver IDs from your clearinghouse
3. Set correct Payer ID on each insurance company
4. Generate X12 from Billing Manager → Generate X12

Where in OpenEMR

Resubmit vs appeal

• Resubmit — claim had a correctable error
• Appeal — payer incorrectly denied a valid claim

Resubmit a claim in OpenEMR

1. Billing → Billing Manager → locate the claim
2. Click Re-Open to reset billing status
3. Edit the encounter or fee sheet
4. Return to Billing Manager and regenerate X12 or HCFA

Corrected claim frequency codes

• 7 — Replacement of prior claim
• 8 — Void / cancel prior claim

Common setup problems that break billing

• Facility missing Tax ID or NPI
• Billing facility not assigned on encounter
• Insurance company missing Payer ID
• Provider taxonomy code blank
• Fee schedule not assigned to insurance plan

Quick setup checklist

1. Admin → Facilities — NPI, Tax ID, address, POS
2. Admin → Users — Provider NPI, taxonomy, facility
3. Admin → Insurance Companies — Payer ID, X12 partner
4. Admin → Fee Schedules — assign to payers
5. Encounter — confirm billing facility on every visit

Where in OpenEMR