E31.21

Multiple endocrine neoplasia [MEN] type I

Billable / specificHCC V28 51

E31.21 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Applicable to

  • Wermer's syndrome

Includes (from E31)

  • Note: All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

Excludes1

Not coded here — never report together with this code.

  • transitory endocrine and metabolic disorders specific to newborn (P70-P74) (from E31)
  • galactorrhea (N64.3) (from E31)
  • gynecomastia (N62) (from E31)
  • ataxia telangiectasia [Louis-Bar] (G11.3) (from E31)
  • dystrophia myotonica [Steinert] (G71.11) (from E31)
  • pseudohypoparathyroidism (E20.1) (from E31)

Code also

An additional code may be needed.

  • any associated malignancies and other conditions associated with the syndromes (from E31.2)

Also known as

  • Wermer's syndrome
  • Disease, diseased, Wermer's
  • Neoplasia, endocrine, multiple, type I
  • Syndrome, Wermer's
  • Wermer's disease or syndrome

Parent code

  • E31.2Multiple endocrine neoplasia [MEN] syndromesHeader

Related codes

  • E31.20Multiple endocrine neoplasia [MEN] syndrome, unspecifiedBillable
  • E31.22Multiple endocrine neoplasia [MEN] type IIABillable
  • E31.23Multiple endocrine neoplasia [MEN] type IIBBillable

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