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Home/Diagnosis/ICD-10 Coding for Elevated Parathyroid Hormone

ICD-10 Coding for Elevated Parathyroid Hormone

E21.0
E21.1

Complete ICD-10-CM coding and documentation guide for icd-10 coding for elevated parathyroid hormone includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
Elevated PTH
Hyperparathyroidism
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Key Information: ICD-10 Coding for Elevated Parathyroid Hormone

Essential facts and insights about ICD-10 Coding for Elevated Parathyroid Hormone

Use ICD-10 code E21.0 for primary hyperparathyroidism, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Primary hyperparathyroidism

Billable Code
E21.0
Billable

Diagnostic Criteria

  • • Serum calcium >10.5 mg/dL on 2+ tests
  • • Intact PTH >65 pg/mL
  • • 24h urine calcium >250 mg (women) / >300 mg (men)

Applicable To

  • • Parathyroid adenoma
  • • Parathyroid hyperplasia

Important Notes

  • • Ensure imaging and lab results are documented to support the diagnosis.

Secondary hyperparathyroidism, not elsewhere classified

Billable Code
E21.1
Billable

Diagnostic Criteria

  • • Normal/low calcium + elevated PTH
  • • Confirmed vitamin D deficiency (25-OH-D <20 ng/mL)

Applicable To

  • • Vitamin D deficiency

Important Notes

  • • Document the specific non-renal cause of secondary hyperparathyroidism.
Ancillary Codes

Additional codes that may be used with this diagnosis

E83.51

Hypercalcemia

Use alongside E21.0 to indicate hypercalcemia as a symptom.

E55.0

Vitamin D deficiency

Use to specify the cause of secondary hyperparathyroidism.

Frequently Asked Questions

What is the ICD-10 code for elevated parathyroid hormone?

The ICD-10 code for primary hyperparathyroidism, a common cause of elevated parathyroid hormone, is E21.0. Secondary hyperparathyroidism not elsewhere classified is coded as E21.1.

How do you code secondary hyperparathyroidism due to CKD?

For secondary hyperparathyroidism due to chronic kidney disease, use N25.81 as the primary code, followed by E21.1 if necessary.

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