0Y6M0ZD
Detachment Foot, Right to Partial 4th Ray with No Device, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | Y Anatomical Regions, Lower Extremities |
| Operation | 6 Detachment |
| Body Part | M Foot, Right |
| Approach | 0 Open |
| Device | Z No Device |
| Qualifier | D Partial 4th Ray |
Operation Definition
Cutting off all or a portion of the upper or lower extremities
Procedure Overview
This family covers amputation procedures of the lower extremity - removing all or part of a leg, thigh, knee, ankle, or foot when the limb can no longer be saved or is causing life-threatening harm. Common reasons include severe peripheral vascular disease that has cut off blood flow, uncontrolled diabetic infection, tissue death from trauma, malignant tumors, or crushing injuries where reconstruction isn't possible. The level chosen - above the knee, below the knee, through the ankle, or partial foot - depends on how much healthy, well-perfused tissue remains and how well the residual limb will support a prosthesis afterward.
Recovery involves wound healing, pain management, and eventually fitting for a prosthetic device and rehabilitation to relearn mobility. Surgeons try to preserve as much functional length as possible while ensuring the remaining tissue has adequate blood supply to heal.
Anatomy & Axis Detail
Foot, Right
The right foot includes the tarsal, metatarsal, and phalangeal structures distal to the ankle, and detachment here can occur at several distinct levels, transmetatarsal, Lisfranc, Chopart, or Syme's ankle disarticulation, chosen based on how far proximally tissue loss or infection extends, most often in the setting of diabetic ulceration, osteomyelitis, or peripheral vascular disease. More distal levels preserve greater foot length and a more natural gait, while proximal levels like Syme's sacrifice the foot entirely but retain a durable, end-bearing residual limb at the ankle. Because the foot has so many potential detachment planes, the operative documentation must specify exactly which bones were divided to allow accurate procedural coding rather than assuming a single default level.
Approach: Open
Open approach means the surgeon cuts through skin, mucous membrane, or other tissue layers to physically expose the target site to view before performing the procedure. It gives direct visualization and hands-on access, distinguishing it from Percutaneous approaches where instruments pass through a small puncture without exposing the site. Open is typical for procedures needing wide access, such as most laparotomies.
Qualifier: Partial 4th Ray
Partial 4th Ray indicates that a detachment procedure removes the fourth toe while leaving part of the fourth metatarsal intact, unlike Complete 4th Ray's full bony removal. It is distinguished from partial resections of neighboring rays by which specific digit-metatarsal segment is affected. This qualifier signals a more limited forefoot amputation.
Coding & Documentation
Coders assign Detachment codes based on the specific anatomical level documented in the operative note - the body part value distinguishes 1st ray, 2nd through 5th ray, foot, ankle, lower leg, knee, upper leg, and hip disarticulation, so the note must state the exact bone or joint level transected. The qualifier further specifies complete versus high or low variants at some levels. A frequent error is defaulting to a generic 'leg amputation' code when the documentation actually supports a more precise ray- or joint-level qualifier, or missing that a revision amputation (converting a failed below-knee stump to above-knee) is coded as a new Detachment procedure at the higher level rather than an Excision.