1. 0S9C3ZZ Root Operation: Drainage, Joint, Knee, Right (0S9C)

Rationale: Arthrocentesis to remove joint fluid is coded with the root operation Drainage.

2. 0TC37ZZ Root Operation: Extirpation, Kidney Pelvis, Right (0TC3)

Rationale: The staghorn calculus pieces are removed via a nephrostomy tube (artificial opening) from the right renal pelvis. The correct root operation is Extirpation which is defined as “Taking or cutting out solid matter from a body part”. The solid matter being removed is the calculus.

3. 0TF4XZZ Root Operation: Fragmentation, Kidney Pelvis, Left (0TF4)

Rationale: ESWL of left renal calculus, fragments the stones in the left renal pelvis for easier ability to pass the stones.

4. 0W9930Z Root Operation: Drainage, Pleural Cavity, Right (0W99)

Rationale: Insertion of a chest tube in the right pleural cavity for drainage of fluid in the chest is coded with the root operation Drainage.

5. 0FF98ZZ Root Operation: Fragmentation, Duct, Common Bile (0FF9)

Rationale: ERCP is performed to fragment a stone in the common bile duct.

6. 0TC68ZZ Root Operation: Extirpation, Ureter, Right (0TC6)

Rationale: Cystoscopy is performed to access the calculus in the right ureter. Once the stone is accessed, the stone is removed with a basket.

7. 0Y913ZZ Root Operation: Drainage, Buttock, Left (0Y91)

Rationale: Left buttock abscess is aspirated via a needle (percutaneous approach).

8. 03C93ZZ Root Operation: Extirpation, Artery, Ulnar, Right (03C9)

Rationale: Thrombectomy meets the definition of the root operation Extirpation. The correct body part is Ulnar Artery, Right - because there is not a specific body part value for interosseous artery, and this is the closest proximal branch that has a specific body part value

9. 0D9A70Z Root Operation: Drainage, Jejunum (0D9A), via natural opening, drainage device, no qualifier