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ICD-10-CM 2027

ICD-10 code for monster

Q89.7

Multiple congenital malformations, not elsewhere classified

✓ Billable / specificCC — complication/comorbidity

From the official ICD-10-CM alphabetic index entry “Monster, monstrosity (single)”. Page updated September 29, 2026.

About coding monster

The ICD-10-CM code for monster is Q89.7 (Multiple congenital malformations, not elsewhere classified). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Q89.7.

Within Q89 (other congenital malformations, not elsewhere classified), Q89.7 is specifically for multiple congenital malformations, not elsewhere classified. Related codes cover congenital absence and malformations of spleen (Q89.0), congenital malformations of adrenal gland (Q89.1), congenital malformations of other endocrine glands (Q89.2), Situs inversus (Q89.3), conjoined twins (Q89.4), other specified congenital malformations (Q89.8) and congenital malformation, unspecified (Q89.9).

Don't report Q89.7 together with the conditions in its Excludes1 note: congenital malformation syndromes affecting multiple systems (Q87.-).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

More specific monster codes (official index)

  • acephalic Q00.0 — Anencephaly
  • twin Q89.4 — Conjoined twins

Don't confuse with (Excludes1 for Q89.7)

  • congenital malformation syndromes affecting multiple systems (Q87.-)

Common questions about monster ICD-10 codes

What is the ICD-10 code for monster?

Q89.7 — Multiple congenital malformations, not elsewhere classified. More specific codes apply when the documentation supports them: Q00.0, Q89.4.

What is the ICD-10 code for acephalic monster?

Q00.0 — Anencephaly.

What is the ICD-10 code for twin monster?

Q89.4 — Conjoined twins.

Is Q89.7 billable?

Yes. Q89.7 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Q89.7 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Q89.7 as a principal diagnosis.

Is Q89.7 a CC or MCC?

Q89.7 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.