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ICD-10 Coding for Lithium Toxicity(T56.891A)

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

Also known as:

Lithium PoisoningLithium Overdose

Related ICD-10 Code Ranges

Complete code families applicable to Lithium Toxicity

T56.8Primary Range

Toxic effect of other metals

This range includes lithium toxicity, which is classified under toxic effects of metals rather than medicinal poisoning.

Key Information: ICD-10 code for lithium toxicity

Essential facts and insights about Lithium Toxicity

The ICD-10 code for lithium toxicity is T56.891A, which covers toxic effects of metals including lithium.

Primary ICD-10-CM Code for lithium toxicity

Toxic effect of other metals, accidental (unintentional), initial encounter
Billable Code

Decision Criteria

clinical Criteria

  • Presence of symptoms consistent with lithium toxicity

documentation Criteria

  • Explicit mention of lithium toxicity or poisoning

Applicable To

  • Lithium toxicity
  • Lithium poisoning

Excludes

  • Adverse effect of lithium (T50.905A)

Clinical Validation Requirements

  • Serum lithium level ≥1.5 mEq/L
  • Symptoms such as tremor, confusion, or renal impairment

Code-Specific Risks

  • Misclassification under T36-T50 series
  • Omission of intent documentation

Coding Notes

  • Ensure documentation specifies the intent (accidental, intentional) and includes relevant lab values.

Ancillary Codes

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

Toxic encephalopathy

G92
Use when encephalopathy is present due to lithium toxicity.

Acute kidney injury, unspecified

N17.9
Use when AKI is present due to lithium toxicity.

Differential Codes

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

Adverse effect of other drugs

T50.905A
Use when toxicity occurs during therapeutic use without overdose.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Lithium Toxicity to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code T56.891A.

Impact

Clinical: Inaccurate clinical records affecting patient care., Regulatory: Potential non-compliance with coding standards., Financial: Incorrect billing and reimbursement.

Mitigation Strategy

Always document whether the ingestion was accidental or intentional.

Impact

Reimbursement: Incorrect DRG assignment leading to potential underpayment., Compliance: Non-compliance with ICD-10 coding guidelines., Data Quality: Inaccurate clinical data affecting patient records.

Mitigation Strategy

Use T56.891A for lithium toxicity as it is classified under metals.

Impact

Failure to document intent can lead to audit discrepancies.

Mitigation Strategy

Ensure all records specify whether the ingestion was accidental or intentional.

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 Lithium Toxicity, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Lithium Toxicity

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

Emergency Department Presentation

Specialty: Emergency Medicine

Required Elements

  • History of lithium ingestion
  • Neurological examination findings
  • Serum lithium level
  • Renal function tests

Example Documentation

Patient presented with confusion and tremor after accidental ingestion of lithium carbonate tablets. Serum lithium level was 2.1 mEq/L.

Examples: Poor vs. Good Documentation

Poor Documentation Example
Patient confused. Lithium level high.
Good Documentation Example
Acute lithium toxicity (serum 2.2 mEq/L) with encephalopathy: confusion, ataxia, and slurred speech. AKI present (creatinine 2.4 mg/dL). Last dose taken 12 hours prior.
Explanation
The good example provides specific lab values, symptoms, and temporal context, ensuring comprehensive documentation.

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

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