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ICD-10 Coding for Hypoparathyroidism(E20.810, E89.2)

Complete ICD-10-CM coding and documentation guide for Hypoparathyroidism. Includes clinical validation requirements, documentation requirements, and coding pitfalls.

Also known as:

Parathyroid hormone deficiencyHypocalcemia due to hypoparathyroidism

Related ICD-10 Code Ranges

Complete code families applicable to Hypoparathyroidism

E20Primary Range

Hypoparathyroidism

This range includes all types of hypoparathyroidism, including genetic, autoimmune, and postsurgical.

Postprocedural hypoparathyroidism

Used for hypoparathyroidism resulting from surgical procedures, primarily thyroidectomy.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
E20.810Autosomal dominant hypocalcemiaUse when genetic testing confirms autosomal dominant hypocalcemia due to CASR mutation.
  • Genetic testing confirming CASR mutation
  • Serum calcium <8.5 mg/dL
  • PTH <15 pg/mL
E89.2Postprocedural hypoparathyroidismUse for chronic hypoparathyroidism following surgical procedures.
  • History of thyroidectomy
  • Persistent hypocalcemia >12 months post-surgery

Clinical Decision Support

Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.

Key Information: ICD-10 code for autosomal dominant hypocalcemia

Essential facts and insights about Hypoparathyroidism

The ICD-10 code for autosomal dominant hypocalcemia is E20.810, used when genetic testing confirms a CASR mutation.

Primary ICD-10-CM Codes for hypoparathyroidism

Autosomal dominant hypocalcemia
Billable Code

Decision Criteria

clinical Criteria

  • Confirmed CASR mutation with hypocalcemia.

Applicable To

  • Hypocalcemia due to CASR mutation

Excludes

  • DiGeorge syndrome
  • Postprocedural hypoparathyroidism

Clinical Validation Requirements

  • Genetic testing confirming CASR mutation
  • Serum calcium <8.5 mg/dL
  • PTH <15 pg/mL

Code-Specific Risks

  • Misidentifying genetic hypocalcemia without genetic confirmation.

Coding Notes

  • Ensure genetic confirmation is documented before using this code.

Ancillary Codes

Additional codes that should be used in conjunction with the main diagnosis codes when applicable.

Tetany

R29.0
Use for acute tetany symptoms associated with hypocalcemia.

Differential Codes

Alternative codes to consider when ruling out similar conditions to the primary diagnosis.

Autoimmune hypoparathyroidism

E20.812
Presence of anti-CaSR antibodies and association with autoimmune conditions.

Unspecified hypoparathyroidism

E20.9
Lack of specific etiology documentation.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Hypoparathyroidism to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code E20.810.

Impact

Clinical: May lead to inappropriate treatment plans., Regulatory: Non-compliance with coding standards., Financial: Potential for denied claims due to lack of specificity.

Mitigation Strategy

Ensure surgical history is reviewed and documented., Use templates to capture necessary details.

Impact

Reimbursement: May lead to lower reimbursement due to lack of specificity., Compliance: Risk of non-compliance with coding guidelines., Data Quality: Decreases the accuracy of patient records.

Mitigation Strategy

Query the provider for specific etiology or type of hypoparathyroidism.

Impact

High risk of audits when using E20.9 without specific etiology.

Mitigation Strategy

Ensure detailed documentation of the type and cause of hypoparathyroidism.

Documentation errors, coding pitfalls, and audit risks are interconnected aspects of medical coding and billing. Addressing all three areas helps ensure accurate coding, optimal reimbursement, and regulatory compliance.

Frequently Asked Questions

Common questions about ICD-10 coding for Hypoparathyroidism, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Hypoparathyroidism

Use these documentation templates to ensure complete and accurate documentation for Hypoparathyroidism. These templates include all required elements for proper coding and billing.

Chronic postsurgical hypoparathyroidism

Specialty: Endocrinology

Required Elements

  • Surgical history
  • Current calcium and PTH levels
  • Treatment plan

Example Documentation

Patient with history of total thyroidectomy in 2024 presents with persistent hypocalcemia. Current labs: calcium 7.1 mg/dL, PTH <5 pg/mL. Diagnosis: Chronic postsurgical hypoparathyroidism (E89.2).

Examples: Poor vs. Good Documentation

Poor Documentation Example
Patient has hypocalcemia.
Good Documentation Example
Patient with history of thyroidectomy presents with hypocalcemia (Ca 7.1 mg/dL, PTH <5 pg/mL). Diagnosis: Chronic postsurgical hypoparathyroidism (E89.2).
Explanation
The good example provides specific surgical history and lab results, supporting the diagnosis.

Need help with ICD-10 coding for Hypoparathyroidism? Ask your questions below.

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