All PlansReimbursementHigh impact
24-1212 Bill Correct Primary Diagnosis on Facility Claims to Avoid Payment Delays
Health Net·CA·Reimbursement
Effective date
Feb 4, 2025
We identified it
Jun 20, 2026
Summary
Starting February 4, 2025, Health Net California will implement new claim edits that will automatically deny facility claims (inpatient and outpatient) with inappropriate primary diagnoses, including manifestation codes, sequela codes, or other unacceptable principal diagnosis codes. Providers must submit corrected claims with compliant primary diagnosis codes following CMS and ICD-10-CM guidelines.
Action Required
Before February 4, 2025: Billing team must review and update claim submission processes to ensure all facility claims use appropriate primary diagnosis codes per ICD-10-CM guidelines. Train coding staff to identify and avoid manifestation codes, sequela codes (seventh character 'S'), and circumstantial codes as primary diagnoses. Update billing software validation rules to flag inappropriate primary diagnoses before claim submission. Failure to comply will result in automatic claim denials requiring corrected claim resubmission.