CARC 16 Denial Code (Claim/Service Lacks Information or Has Submission Error) | ANSI 835 EDI Spec
Comprehensive healthcare EDI technical reference and denial resolution guide for Claim Adjustment Reason Code 16 (Claim/Service Lacks Information or Has Submission Error) under ANSI ASC X12 835 005010X221A1.
Direct Answer Capsule: Comprehensive healthcare EDI technical reference and denial resolution guide for Claim Adjustment Reason Code 16 (Claim/Service Lacks Information or Has Submission Error) under ANSI ASC X12 835 005010X221A1. Conforms strictly to ANSI ASC X12 Standards (005010) with zero cold-starts and deterministic edge verification.
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Specification & Structural Breakdown
Technical Rule Summary: Implementation conforms strictly to ANSI ASC X12 Standards (005010). Data ingestion is fully deterministic: identical inputs always produce bit-for-bit identical outputs without ambient side-effects.
Claim Adjustment Reason Code (CARC) 16 communicates: "Claim/service lacks information or has submission/billing error(s). At least one Remark Code must be provided.".
In ANSI X12 835 Electronic Remittance Advice (ERA) files, CARC 16 is reported in Loop 2110 (Service Payment Information) or Loop 2100 (Claim Payment Information) under the Claim Adjustment (CAS) segment with Group Code 'CO' (Contractual Obligation), formatted as: CAS*CO*16*AMOUNT~.
Root Cause: Missing or invalid data elements such as patient demographics, NPI, NDC number, medical record attachments, or required modifiers.
Adjudication & Appeal Strategy: Inspect accompanying RARC codes (e.g., M51, MA130), correct the missing data element on the original 837 claim, and submit as a corrected claim (CLM05-3=7).
| Attribute | Value | Technical Guidance |
|---|---|---|
| Reason Code | CARC 16 | Claim/Service Lacks Information or Has Submission Error |
| Standard Group Code | CO | Contractual Obligation |
| ANSI 835 Segment | CAS*CO*16*AMOUNT~ | Loop 2110 or Loop 2100 |
| Balance Billing Patient | Prohibited — this is an administrative claim defect. | Compliance with billing regulations |
| Common RARCs | M51, MA130, N257 | Remittance Advice Remark Codes |
| Recommended Action | Inspect accompanying RARC codes (e.g., M51, MA130), correct the missing data element on the original 837 claim, and submit as a corrected claim (CLM05-3=7). | Workflow for billing teams |
Parsed JSON Response Model
The edge microservice transforms input payloads into strongly-typed hierarchical JSON envelopes with sub-5ms latency:
{
"transactionType": "835",
"claimNumber": "CLM-2026-001",
"adjudication": {
"billedAmount": 500,
"paidAmount": 0,
"adjustments": [
{
"groupCode": "CO",
"groupName": "Contractual Obligation",
"reasonCode": "16",
"reasonDescription": "Claim/Service Lacks Information or Has Submission Error",
"adjustmentAmount": 500
}
]
}
}
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Frequently Asked Questions & Technical Notes
CARC 16 signifies: "Claim/service lacks information or has submission/billing error(s). At least one Remark Code must be provided.". It explains why the payer did not pay the full billed charge.
Prohibited — this is an administrative claim defect.
Inspect accompanying RARC codes (e.g., M51, MA130), correct the missing data element on the original 837 claim, and submit as a corrected claim (CLM05-3=7).
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