277CA Claim Acknowledgment

After you submit an 837 claim file, your clearinghouse or payer sends back a 277CA Claim Acknowledgment telling you, claim by claim, whether each one was accepted for processing or rejected. EDI Paisan turns that file into a plain-language Claim Status dashboard so you can see instantly which claims are ready and which need attention.

What is a 277CA Claim Acknowledgment?

A 277CA (officially "Health Care Claim Acknowledgment," Implementation Guide 005010X214) is the response that follows an 837 submission. For each claim it reports one of:

• ✅ Accepted — the claim passed front-end edits and entered the payer's adjudication system
• ⚠️ Pending — the claim was received but is awaiting information or review
• ❌ Rejected — the claim was returned as unprocessable and never reached the payer

When a 277CA shows rejections, those claims will never come back on an 835 remittance until you correct the problem and resubmit.

277CA vs. 999: A 999 tells you whether your file was structurally valid. A 277CA goes further and tells you whether each individual claim was accepted for processing. You may receive both for a single submission.

Where Do 277CA Files Come From?

You'll receive 277CA files from:

• Clearinghouses (Availity, Change Healthcare, Trizetto, etc.) — usually within minutes to hours of submission
• Payers (Medicare, Medicaid, commercial insurers) — timing varies by payer

Check your clearinghouse portal or SFTP folder for files with names like:

• 277_*.edi
• *_277CA.edi
• *_claimack.edi

The functional group code is HN (GS01) and the version is 005010X214.

Common Rejection Reasons

Reason (Category / Status)	What It Means	How to Fix
A3 / 21	Missing or invalid information	Review the flagged field and correct it
A3 / 33	Subscriber and subscriber ID not found	Verify the member ID from the insurance card
A7 / 509	Missing or invalid billing provider information	Confirm the billing provider NPI and tax ID
A3 / 187	Date(s) of service problem	Check service dates are valid and in range
A7 / 454	Procedure code for services rendered	Verify the CPT/HCPCS code
A6 / 206	National Provider Identifier — missing	Populate the required NPI

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Using the Claim Status Dashboard

Step 1: Upload Your 277CA File

1. Go to EDI Paisan
2. Click Upload File or drag-and-drop your 277CA file
3. EDI Paisan automatically detects the 277CA and opens the Claim Status dashboard

Step 2: Review the Rollup

At the top of the dashboard, count cards summarize the whole file:

• Total Claims — every claim tracked in the acknowledgment
• Accepted — claims that entered adjudication
• Pending / Warning — claims awaiting information or review
• Rejected — claims returned as unprocessable

Click any card to filter the claim list to just that status.

Step 3: Drill Into a Claim

Each claim card shows the patient control number, patient name, billing provider, charge amount, and a colored status pill. Expand a claim to see:

• Why — every STC status decoded into plain language, e.g. "A3/21 — Returned as unprocessable: Missing or invalid information"
• Service lines — line-level statuses where the payer returned them
• Reference details — the payer claim control number (ICN/DCN) for accepted claims, service date, and payer
• What to expect — clear next-step guidance for that claim

Step 4: Work Your Rejections

Filter to Rejected and work down the list. For each rejected claim:

1. Read the decoded reason and entity (who/what the problem is about)
2. Note any free-form text the payer included
3. Fix the underlying data in your source system

Step 5: Fix Issues in Your Source System

The reasons you see are in EDI terms, but the fix usually needs to happen in your:

• Practice Management System (PMS)
• Electronic Health Record (EHR)
• Billing software
• Claims scrubber

Make the corrections, regenerate your 837, and resubmit to the clearinghouse.

Step 6: Export a Report (Pro)

From the Export menu, you can:

• Print / Save as PDF — a formatted Claim Status Report to share with your billing team
• Export CSV — one row per claim (control number, patient, charge, status, reason codes, payer claim number) to build a worklist or import into a spreadsheet

Viewing the dashboard is Free; downloading or printing the report requires Pro.

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Understanding Claim Status Codes

Status lives in the STC segment as a composite: Category:Status:Entity.

Category Codes (the disposition)

Code	Meaning	Disposition
A1	Acknowledgement / Receipt	✅ Accepted
A2	Acknowledgement / Acceptance into adjudication	✅ Accepted
A3	Returned as unprocessable claim	❌ Rejected
A4	Not found	❌ Rejected
A6	Rejected for missing information	❌ Rejected
A7	Rejected for invalid information	❌ Rejected
A8	Rejected for relational field in error	❌ Rejected
P0–P5	Pending (in process / awaiting info / in review)	⚠️ Pending
R0–R4	Requests for additional information	⚠️ Action needed

Status Codes (the reason)

Code	Meaning
20	Accepted for processing
21	Missing or invalid information
33	Subscriber and subscriber ID not found
187	Date(s) of service
454	Procedure code for services rendered
509	Missing or invalid billing provider information

The full code lists are in the Qualifier Codes reference.

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Tips for Faster Claim Follow-Up

1. Start with the Rejected filter — those are the only claims that need immediate action.

2. Record the payer claim number — accepted claims get an ICN/DCN (REF*1K). Save it for status inquiries and appeals.

3. Look for patterns — the same rejection across many claims (e.g., an invalid provider NPI) usually points to a systemic setup issue, not a per-claim typo.

4. Don't wait for the 835 — a 277CA rejection means no remittance is coming for that claim. The sooner you correct and resubmit, the sooner you get paid.

5. Accepted ≠ Paid — acceptance means the claim entered adjudication. Payment or denial arrives later in the 835.

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Related Documentation

• 277CA File Type Reference — Segment and loop details
• 837 Professional Claims — The claim file a 277CA acknowledges
• 999 Troubleshooting — File-level acknowledgment (structure validation)
• 835 Remittance Advice — The payment that follows an accepted claim

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Need Help?

If you're stuck on a specific rejection:

1. Check the X12 277 Implementation Guide for field requirements
2. Contact your clearinghouse support for payer-specific rules
3. Reach out to us at support@edipaisan.com