Other hypertrophic osteoarthropathy, unspecified upper arm

This code signifies a non-specific form of hypertrophic osteoarthropathy affecting the upper arm. This condition involves abnormal bone and joint changes, often characterized by periostitis (inflammation of the periosteum) and clubbing of digits, but in this instance, the specific type of hypertrophic osteoarthropathy is not identified.

Use this code when documentation indicates hypertrophic osteoarthropathy in the upper arm, but the underlying cause or specific variant (e.g., primary, secondary) is not specified. This code is appropriate when the medical record clearly identifies the anatomical site as the upper arm and the condition as hypertrophic osteoarthropathy without further detail.

• Ensure the documentation explicitly states "unspecified" or lacks further detail regarding the type of hypertrophic osteoarthropathy.
• Avoid using this code if a more specific type of hypertrophic osteoarthropathy (e.g., primary, secondary, or associated with a specific disease) is documented; instead, use the appropriate specific code.
• Always code the underlying condition causing secondary hypertrophic osteoarthropathy first, if known and documented.