AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2025 Issue 4; New/Revised ICD-10-CM Codes
Disorders of Pyrophosphate Metabolism
Subcategory E83.82, Disorders of pyrophosphate metabolism, was created with new codes to identify specific disorders of pyrophosphate metabolism as follows:E83.820 Generalized arterial calcification of infancy with unspecified genetic causalityE83.821 ENPP1 deficiency causing generalized arterial calcification of infancyE83.822 ENPP1 deficiency causing autosomal recessive hypophosphatemic rickets type 2E83.823 ABCC6 deficiency causing generalized arterial calcification of infancyE83.824 ABCC6 deficiency causing pseudoxanthoma elasticumE83.825 CD73 deficiency causing arterial calcification Ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) is a protein involved in the production of pyrophosphate, which is important in preventing the accumulation of abnormal deposits of calcium and other minerals...
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Article Overview
This article covers a newly created ICD-10-CM subcategory for disorders of pyrophosphate metabolism and the related inherited conditions it is intended to differentiate. It is useful for coders, CDI specialists, and clinicians who work with metabolic, genetic, vascular calcification, and bone mineralization diagnoses. The discussion provides broad clinical context for the disorders, the affected pathways, and the reasons these distinctions matter for documentation and code selection.
Why This Topic Matters
The article helps readers recognize how similar genetic and metabolic conditions are organized within a new diagnosis grouping so that documentation can be matched to the correct level of specificity. It is especially relevant where infancy, skeletal findings, vascular calcification, and hereditary patterns overlap.
Article Sections
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New subcategory and code creation
Introduces the newly created diagnosis grouping and the set of related conditions included in the update.
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ENPP1-related disorders
Provides background on the pathway component associated with pyrophosphate production and reviews the broad clinical context for the related inherited disorder spectrum.
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Autosomal recessive hypophosphatemic rickets type 2
Summarizes the skeletal and mineralization disorder associated with the same pathway and describes the general clinical picture across age groups.
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ABCC6 deficiency and pseudoxanthoma elasticum
Describes the transport protein involved in the pathway and the related inherited disorder affecting connective tissue and calcification.
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CD73 deficiency and arterial calcification
Covers the enzyme involved in the same metabolic pathway and the broad clinical features of the associated arterial calcification disorder.
What You Will Learn
- How the pyrophosphate metabolism disorder grouping is organized
- Which inherited conditions are discussed within the new subcategory
- What broad clinical themes connect the related metabolic and calcification disorders
- Why documentation specificity matters for these diagnoses
Who Should Read This
- Medical coders
- Coding auditors
- Clinical documentation improvement specialists
- Physicians and advanced practice clinicians
- Healthcare reimbursement staff
Codes Discussed
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