All ICD10 Codes

E31.21

Billable
ChapterE00–E89
Ranksubcategory
Official Description

Multiple endocrine neoplasia [MEN] type I

Metadata & Insights
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 4: Endocrine, Nutritional and Metabolic Diseases (E00-E89).

Instructional Notes

Includes
  • Wermer's syndrome
General instructions are available for the parent sections:
View CH4 NotesView E20-E35 NotesView E31 NotesView E31.2 Notes

Clinical Hierarchy

BillableHas subcodes
CH4Endocrine, nutritional and metabolic diseases (E00-E89)
E20-E35Disorders of other endocrine glands (E20-E35)
E31Polyglandular dysfunction
E31.2Multiple endocrine neoplasia [MEN] syndromes
E31.21Multiple endocrine neoplasia [MEN] type IBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to E31.21:

subcategoryE31.2
Multiple endocrine neoplasia [MEN] syndromes
View context instructions
categoryE31
Polyglandular dysfunction
View context instructions
blockE20-E35
Disorders of other endocrine glands (E20-E35)
View context instructions
chapterCH4
Endocrine, nutritional and metabolic diseases (E00-E89)
View context instructions

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 643
Endocrine Disorders with MCC
DRG 644
Endocrine Disorders with CC
DRG 645
Endocrine Disorders without CC/MCC

Cross Reference

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