R90.89 — Other abnormal findings on diagnostic imaging of central nervous system
ICD-10-CM
Prior Authorization
No Prior Auth Required
Code is covered without prior authorization (high confidence)
Documentation Required
- This billing and coding article provides guidelines that complement Local Coverage Determination L34415 for CT of the abdomen and pelvis; consult LCD L34415 for specific coverage indications, limitations, and documentation requirements.
- This billing/coding guideline complements LCD L33459 (Computerized Axial Tomography (CT), Thorax); follow the LCD for clinical coverage and any required documentation or prior authorization rules.
- Medical records must include history and physical notes, laboratory results, and documentation of signs and symptoms that warrant the head/neck diagnostic imaging.
- Accurate HCPCS/CPT coding must be submitted to differentiate CT and MRI scans from other radiology services and to support coverage determinations.
Key Coverage Criteria
- CT or MRI scans of the head or neck are covered when the medical record documents the scan is reasonable and necessary for diagnostic evaluation.
- Coverage requires documentation supporting clinical indication such as history and physical exam findings, laboratory results, and signs or symptoms that justify the diagnostic test.
- G71.21 | Nemaline myopathy
- G83.0 | Diplegia of upper limbs
- H44.19 | Other endophthalmitis
- H44.532 | Leucocoria, left eye
13 Active Policies
A57215 — Billing and Coding: MRI and CT Scans of the Head and Neck
A57690 — Billing and Coding: Lab: Flow Cytometry
AETNA-CPB-0349 — Alzheimer's Disease Tests
ANTHEM-CG-LAB-20 — CG-LAB-20 Thyroid Testing
A56421 — Billing and Coding: CT of the Abdomen and Pelvis
Related Codes
Have a follow-up question?
Ask Verity about documentation requirements, denial risks, or coverage in your state.