E21.5

Disorder of parathyroid gland, unspecified

Risk-adjusting (HCC)Billable code

HCC risk adjustment mapping

CMS-HCC ESRD V24

HCC23

Other Significant Endocrine and Metabolic Disorders

RxHCC V08

RXHCC43

Pituitary, Adrenal Gland, and Other Endocrine and Metabolic Disorders

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

Inherited from E21Hyperparathyroidism and other disorders of parathyroid gland

Excludes 1

adult osteomalacia (M83.-) ectopic hyperparathyroidism (E34.2) hungry bone syndrome (E83.81) infantile and juvenile osteomalacia (E55.0)

Excludes 2

familial hypocalciuric hypercalcemia (E83.52)

Inherited from E20-E35Disorders of other endocrine glands

Excludes 1

galactorrhea (N64.3) gynecomastia (N62)

Inherited from chapter 4Endocrine, nutritional and metabolic diseases

Excludes 1

transitory endocrine and metabolic disorders specific to newborn (P70-P74)

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.

Official Guidelines for E21.5

FY 2026 ›

I.C.4Chapter-specific guidanceChapter 4: Endocrine, Nutritional, and Metabolic Diseases (E00-E89)

Subsections

Find E21.5 in the alphabetic index

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