E21.0
Billable
ChapterE00–E89
Ranksubcategory
Official Description
Primary hyperparathyroidism
Metadata & Insights
- •2026 ICD-10-CM Edition - Effective October 1, 2025.
- •Billable/specific code (valid for reimbursement).
- •Chapter 4: Endocrine, Nutritional and Metabolic Diseases (E00-E89).
Instructional Notes
Includes
- Hyperplasia of parathyroid
- Osteitis fibrosa cystica generalisata [von Recklinghausen's disease of bone]
General instructions are available for the parent sections:
Clinical Hierarchy
Applicable Ancestor Context
The following parent sections contain instructions or notes that apply to E21.0:
Alphabetic Index Mentions
These are Diagnosis Index lookup paths that route to E21.0. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.
11 raw paths
Curvature1 unique routes
Disease, diseased1 unique routes
Enlargement, enlarged1 unique routes
Hyperparathyroidism1 unique routes
Hyperplasia, hyperplastic1 unique routes
Hypertrophy, hypertrophic1 unique routes
Osteitis3 unique routes
Recklinghausen disease1 unique routes
Von Recklinghausen1 unique routes
MS-DRG Classification
This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:
Cross Reference
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