Does K56.3 require prior authorization?

No, K56.3 does not require prior authorization (high confidence). Covered without prior authorization.

`K56.3`, Gallstone ileus

ICD-10-CM

No Prior Auth Required

Covered without prior authorization (high confidence)

Medical records must document that the ultrasound was limited to retroperitoneal structures when billing CPT 76770/76775/76776, including images/findings demonstrating limitation to the retroperitoneum.
If the exam was expanded to include organs outside the retroperitoneum, documentation must reflect the expansion and support billing a full or limited abdominal ultrasound (CPT 76700/76705/76706).
Claims and documentation should follow the complementary Local Coverage Determination L34577 and any applicable LCD requirements.
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.

Retroperitoneal ultrasound (CPT 76770, 76775, 76776) is covered when the exam is limited solely to retroperitoneal structures.
A full (complete) or limited abdominal ultrasound (CPT 76700, 76705, 76706) is covered when the exam includes organs or structures outside the retroperitoneum or when primary findings involve non-retroperitoneal structures (e.g., gallbladder, liver, spleen, common bile duct).
Colonoscopy/sigmoidoscopy/proctosigmoidoscopy is covered for surveillance of colonic neoplasia in patients with a history of colorectal cancer or colonic polyps.
A follow-up procedure is covered 1 year after surgery for treatment of colorectal cancer when the patient is identified as high-risk for colon cancer and is eligible for continued screenings.
A colonoscopy may be billed when a sigmoidoscope is used only if the bowel is sufficiently short that the entire colon can be examined and this fact is clearly documented in the clinical record.
An incomplete colonoscopy (inability to advance the colonoscope to the cecum or colon‑small intestine anastomosis due to unforeseen circumstances) is billed using codes 44388, 45378, G0105 or G0121 with modifier -53.

CGS-J15-L39038, MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing

J15

CGS-J15-L34005, Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy

J15

CGS-J18-L34005, Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy

J18

CGS-J18-L39038, MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing

J18

Ask Backwork about documentation requirements, denial risks, or coverage in your state.