K81.9 — Cholecystitis, unspecified
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.
- CT scans must be performed on CT equipment models that are FDA-known and in full market release phase.
- No explicit documentation requirements are stated in the policy
- Policy references clinical data elements commonly used in interpretation (e.g., gallbladder ejection fraction values such as <40% or <35%, reproduction of biliary pain during CCK-CS, prior ultrasonography showing cholelithiasis), but the policy does not mandate specific documentation or test result thresholds as coverage preconditions
Key Coverage Criteria
- CT abdomen is medically necessary to evaluate abdominal pain.
- CT abdomen is medically necessary to evaluate known or suspected abdominal masses or fluid collections.
- CT abdomen is medically necessary for evaluation of primary or metastatic malignancies in the abdomen.
- CT abdomen is medically necessary to evaluate abdominal inflammatory processes.
- CT abdomen is medically necessary to evaluate abnormalities of abdominal vascular structures.
- CT abdomen is medically necessary to evaluate abdominal trauma.
5 Active Policies
A57802 — Billing and Coding: Hepatic (Liver) Function Panel
AETNA-CPB-0266 — Cholecystokinin Cholescintigraphy
AETNA-CPB-0384 — Magnetic Resonance Cholangiopancreatography
A56421 — Billing and Coding: CT of the Abdomen and Pelvis
L34415 — CT of the Abdomen and Pelvis
Related Codes
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