All ICD10 Codes

E21.1

Billable
ChapterE00–E89
Ranksubcategory
Official Description

Secondary hyperparathyroidism, not elsewhere classified

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

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • secondary hyperparathyroidism of renal origin (N25.81)
General instructions are available for the parent sections:
View CH4 NotesView E20-E35 NotesView E21 Notes

Clinical Hierarchy

BillableHas subcodes
CH4Endocrine, nutritional and metabolic diseases (E00-E89)
E20-E35Disorders of other endocrine glands (E20-E35)
E21Hyperparathyroidism and other disorders of parathyroid gland
E21.1Secondary hyperparathyroidism, not elsewhere classifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to E21.1:

categoryE21
Hyperparathyroidism and other disorders of parathyroid gland
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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