Other adult osteomalacia

This code signifies adult osteomalacia that does not fit into more specific categories of the disease, such as puerperal, senile, or due to malabsorption. It represents a metabolic bone disorder characterized by inadequate mineralization of newly formed osteoid in mature bone, leading to bone softening and increased fracture risk. This condition results from various underlying causes impacting vitamin D metabolism, phosphate levels, or bone mineralization processes.

Assign this code when documentation specifies adult osteomalacia without a more precise etiology, such as osteomalacia due to renal tubular disorders, chronic liver disease, or certain medications. Supporting documentation should clearly indicate osteomalacia in an adult patient and rule out more specific forms. This code is appropriate when the specific cause is known but not explicitly categorized by other ICD-10-CM codes for osteomalacia.

• Do not use this code if a more specific ICD-10-CM code for adult osteomalacia (e.g., M83.0 for puerperal, M83.1 for senile) is available and supported by documentation.
• Always code the underlying cause of the osteomalacia, if known, as a primary or secondary diagnosis, following sequencing guidelines.
• Differentiate from osteoporosis (M81.-), which involves reduced bone mass but normal mineralization, whereas osteomalacia involves defective mineralization.