| 81.00 | Spinal fusion, not otherwise specified |
| 81.01 | Atlas-axis spinal fusion |
| 81.02 | Other cervical fusion of the anterior column, anterior technique |
| 81.03 | Other cervical fusion of the posterior column, posterior technique |
| 81.04 | Dorsal and dorsolumbar fusion of the anterior column, anterior technique |
| 81.05 | Dorsal and dorsolumbar fusion of the posterior column, posterior technique |
| 81.06 | Lumbar and lumbosacral fusion of the anterior column, anterior technique |
| 81.07 | Lumbar and lumbosacral fusion of the posterior column, posterior technique |
| 81.08 | Lumbar and lumbosacral fusion of the anterior column, posterior technique |
| 81.11 | Ankle fusion |
| 81.12 | Triple arthrodesis |
| 81.13 | Subtalar fusion |
| 81.14 | Midtarsal fusion |
| 81.15 | Tarsometatarsal fusion |
| 81.16 | Metatarsophalangeal fusion |
| 81.17 | Other fusion of foot |
| 81.18 | Subtalar joint arthroereisis |
| 81.20 | Arthrodesis of unspecified joint |
| 81.21 | Arthrodesis of hip |
| 81.22 | Arthrodesis of knee |
| 81.23 | Arthrodesis of shoulder |
| 81.24 | Arthrodesis of elbow |
| 81.25 | Carporadial fusion |
| 81.26 | Metacarpocarpal fusion |
| 81.27 | Metacarpophalangeal fusion |
| 81.28 | Interphalangeal fusion |
| 81.29 | Arthrodesis of other specified joints |
| 81.30 | Refusion of spine, not otherwise specified |
| 81.31 | Refusion of atlas-axis spine |
| 81.32 | Refusion of other cervical spine, anterior column, anterior technique |
| 81.33 | Refusion of other cervical spine, posterior column, posterior technique |
| 81.34 | Refusion of dorsal and dorsolumbar spine, anterior column, anterior technique |
| 81.35 | Refusion of dorsal and dorsolumbar spine, posterior column, posterior technique |
| 81.36 | Refusion of lumbar and lumbosacral spine, anterior column, anterior technique |
| 81.37 | Refusion of lumbar and lumbosacral spine, posterior column, posterior technique |
| 81.38 | Refusion of lumbar and lumbosacral spine, anterior column, posterior technique |
| 81.39 | Refusion of spine, not elsewhere classified |
| 81.40 | Repair of hip, not elsewhere classified |
| 81.42 | Five-in-one repair of knee |
| 81.43 | Triad knee repair |
| 81.44 | Patellar stabilization |
| 81.45 | Other repair of the cruciate ligaments |
| 81.46 | Other repair of the collateral ligaments |
| 81.47 | Other repair of knee |
| 81.49 | Other repair of ankle |
| 81.51 | Total hip replacement |
| 81.52 | Partial hip replacement |
| 81.53 | Revision of hip replacement, not otherwise specified |
| 81.54 | Total knee replacement |
| 81.55 | Revision of knee replacement, not otherwise specified |
| 81.56 | Total ankle replacement |
| 81.57 | Replacement of joint of foot and toe |
| 81.59 | Revision of joint replacement of lower extremity, not elsewhere classified |
| 81.62 | Fusion or refusion of 2-3 vertebrae |
| 81.63 | Fusion or refusion of 4-8 vertebrae |
| 81.64 | Fusion or refusion of 9 or more vertebrae |
| 81.65 | Percutaneous vertebroplasty |
| 81.66 | Percutaneous vertebral augmentation |
| 81.71 | Arthroplasty of metacarpophalangeal and interphalangeal joint with implant |
| 81.72 | Arthroplasty of metacarpophalangeal and interphalangeal joint without implant |
| 81.73 | Total wrist replacement |
| 81.74 | Arthroplasty of carpocarpal or carpometacarpal joint with implant |
| 81.75 | Arthroplasty of carpocarpal or carpometacarpal joint without implant |
| 81.79 | Other repair of hand, fingers, and wrist |
| 81.80 | Other total shoulder replacement |
| 81.81 | Partial shoulder replacement |
| 81.82 | Repair of recurrent dislocation of shoulder |
| 81.83 | Other repair of shoulder |
| 81.84 | Total elbow replacement |
| 81.85 | Other repair of elbow |
| 81.88 | Reverse total shoulder replacement |
| 81.91 | Arthrocentesis |
| 81.92 | Injection of therapeutic substance into joint or ligament |
| 81.93 | Suture of capsule or ligament of upper extremity |
| 81.94 | Suture of capsule or ligament of ankle and foot |
| 81.95 | Suture of capsule or ligament of other lower extremity |
| 81.96 | Other repair of joint |
| 81.97 | Revision of joint replacement of upper extremity |
| 81.98 | Other diagnostic procedures on joint structures |
| 81.99 | Other operations on joint structures |
