CPT Code 47510: Percutaneous Transhepatic Biliary Drainage (PTBD) — Correct Coding

Correct Code for PTBD: 47510 (Not 81599)

CPT 81599 is an unlisted molecular pathology procedure code — not for biliary drainage. The correct code for percutaneous transhepatic biliary drainage is CPT 47510 (or 47511 with stent placement).

CPT 47510 — Percutaneous Transhepatic Biliary Drainage

• Description: Percutaneous placement of catheter for biliary drainage; diagnostic or therapeutic.
• Includes: Imaging guidance (fluoroscopy/US), catheter placement, contrast injection, drainage catheter secured.
• Typical Indications: Malignant obstruction (cholangiocarcinoma, pancreatic cancer), benign strictures, post-surgical leaks, cholangitis decompression.
• Performed by: Interventional Radiology (IR) or Interventional GI.
• Setting: Hospital IR suite; moderate sedation or general anesthesia.
• Duration: 60–120 minutes.

Related Codes

Code	Description
47511	PTBD with internal/external stent placement (e.g., metal stent)
47531	Conversion of external drain to internal-external drain
47532	Revision/repositioning of biliary drain
47533	Removal of biliary drain (requires tract maturity)
74305	Radiological S&I for biliary drainage (if billed separately by radiologist)

Billing Components

• Professional Component (IR/Physician): 47510-26 (work, expertise).
• Technical Component (Facility): 47510-TC (room, equipment, staff, supplies).
• Global: 47510 (if same entity provides both).

Documentation Requirements

• Indication, consent, pre-procedure imaging review.
• Technique: access site, needle/wire/catheter details, contrast used, final catheter position confirmed.
• Post-procedure plan: drainage bag care, output monitoring, clamp trial, follow-up imaging.
• Complications: bile leak, hemorrhage, sepsis, pneumothorax.

ICD-10-CM Diagnosis Codes (Examples)

• K83.1 — Obstruction of bile duct
• C22.1 — Intrahepatic bile duct carcinoma
• C24.0 — Extrahepatic bile duct carcinoma
• K83.0 — Cholangitis
• K91.89 — Postprocedural biliary leak

Always verify with current CPT manual and payer policies. 81599 is incorrect for this procedure.