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  2. ICD-10-CM Codes List
  3. Q00-Q99
  4. Q65-Q79
  5. Reduction defects of unspecified limb (Q73)

Reduction defects of unspecified limb (Q73)

ICD-10 code Q73 addresses reduction defects of unspecified limbs, capturing congenital conditions where parts or whole limbs are missing or underdeveloped without specifying which limb. This category includes complete absence, such as amelia, and other complex malformations.

The section includes Q73.0 for congenital absence of unspecified limb(s), covering terms like "congenital complete absence of upper limb" and autosomal recessive amelia, thus coding for cases where a limb is entirely missing from birth. Q73.1 refers to phocomelia of unspecified limbs, which is a rare congenital condition characterized by severely shortened limbs and is linked to several syndromes including Roberts-SC and DK phocomelia syndromes. Q73.8 captures other limb reduction defects that do not fit the previous categories, such as micromelia, brachydactyly, symphalangism, and various complex syndromes involving limb shortening combined with other anomalies. These codes are essential for identifying and documenting congenital limb malformations when the affected limb is not specified.

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Anetoderma

Benign DERMATOSIS caused by a loss of dermal ELASTIC TISSUE resulting in localized sac-like areas of flaccid skin. It can be either primary (idiopathic) or secondary to other skin conditions, PENICILLAMINE use, or premature birth.

Ectromelia

Gross hypo- or aplasia of one or more long bones of one or more limbs. The concept includes amelia, hemimelia, phocomelia, and sirenomelia.

Ectromelia virus

A species of ORTHOPOXVIRUS infecting mice and causing a disease that involves internal organs and produces characteristic skin lesions.

Ectromelia, Infectious

A viral infection of mice, causing edema and necrosis followed by limb loss.

Orthopoxvirus

A genus of the family POXVIRIDAE, subfamily CHORDOPOXVIRINAE, comprising many species infecting mammals. Viruses of this genus cause generalized infections and a rash in some hosts. The type species is VACCINIA VIRUS.