ICD-10 Guide

Above The Knee Amputation

ICD-10 Coding for Above-the-Knee Amputation(Z89.61x, Z89.62x)

PRIMARY SPECIALTYVascular Surgery

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Above The Knee Amputation?

Above-the-knee amputation (AKA) is a surgical procedure that involves the removal of the leg above the knee joint. This procedure is typically performed due to severe trauma, vascular disease, or malignancy. Key clinical points include: 1) It is often a last resort when limb salvage is not possible; 2) Common indications include peripheral artery disease, diabetes-related complications, and severe infections; 3) Patients may experience significant changes in mobility and require rehabilitation; 4) Post-operative care is critical for preventing complications such as infection or phantom limb pain. The etiology of AKA often stems from chronic conditions that compromise blood flow, leading to tissue necrosis. The clinical presentation may include severe pain, non-healing ulcers, or gangrene in the affected limb. Typical use cases for this diagnosis code include cases where conservative management has failed, and the patient's quality of life is severely impacted by their limb condition.

Key Clinical Considerations:

Diagnosis is confirmed through clinical evaluation and imaging studies showing irreversible damage to the limb.
Signs include severe limb ischemia, necrosis, or significant trauma; symptoms may include pain, swelling, and inability to ambulate.
Resolution criteria involve successful rehabilitation and adaptation to prosthetics, with no further complications.
Imaging findings may include angiography showing occluded vessels or MRI revealing extensive tissue damage.

Clinical Information

Clinical Criteria & Documentation Requirements

Documentation must include the reason for amputation, pre-operative assessments, and post-operative care plans.
Compliant documentation includes detailed descriptions of the patient's condition and the rationale for the procedure; non-compliant documentation may lack specificity or clinical justification.
Template phrases: 'Patient's condition necessitated amputation due to [specific reason]'; 'Pre-operative imaging confirmed [findings]'.
Medical necessity must be clearly established through documentation of failed conservative treatments and the impact on the patient's quality of life.

Coding Guidelines

Usage Guidelines & Examples

Use this code when the amputation is performed due to irreversible conditions such as severe trauma or vascular disease; for example, a patient with critical limb ischemia.
Do NOT use this code for amputations performed below the knee or for elective amputations without significant medical necessity.
Correct usage: Z89.61 for unilateral AKA due to diabetes; incorrect usage: Z89.62 for a below-the-knee amputation.
Common errors include using the wrong code for the level of amputation; avoid this by verifying the procedure details.

Code Exclusions

Important Exclusions

Excluded conditions include below-the-knee amputations (Z89.63) and congenital limb deficiencies.
Alternative codes for exclusions may include Z89.63 for lower limb amputations.
Common exclusion errors include misclassifying the level of amputation; ensure clarity in documentation.
Certain conditions are excluded to maintain specificity in coding and ensure accurate reimbursement.

Specialty Focus

Primary Specialty

Vascular Surgery

Specialty Applications

This diagnosis applies to patients with severe limb ischemia, traumatic limb loss, or malignancies necessitating amputation.
Appropriate clinical scenarios include emergency settings where immediate intervention is required.
Practice settings vary; inpatient settings may focus on surgical intervention, while outpatient settings may emphasize rehabilitation.
Specialty-specific considerations include vascular surgery protocols and rehabilitation services.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

Comprehensive clinical documentation
Accurate code selection based on clinical criteria
Proper exclusion considerations
Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Above-the-knee amputation diagnosed based on clinical findings and imaging results.'

Template 2

Template: 'Patient presents with severe ischemia consistent with the need for above-the-knee amputation.'

Template 3

Template: 'Diagnostic criteria met: Imaging shows extensive necrosis of the limb.'

Template 4

Template: 'Treatment plan includes rehabilitation and prosthetic fitting for above-the-knee amputation.'

Billing Information

Billing Considerations

Ensure proper documentation for billing
Verify code specificity requirements
Check for any additional codes needed
Review payer-specific guidelines

Common Issues

Insufficient clinical documentation
Incorrect code selection
Missing supporting diagnoses
Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this code?

Detailed documentation must include clinical findings, imaging results, and the rationale for amputation.

When should this code be used vs similar codes?

Use this code for above-the-knee amputations; similar codes apply to below-the-knee amputations.

What are common billing issues with this code?

Reimbursement may be denied if medical necessity is not clearly documented; ensure all criteria are met.

What procedures are commonly associated?

Related CPT codes include 27590 for above-the-knee amputation and 27591 for revision procedures.

What is Above The Knee Amputation?

Key Clinical Considerations:

Diagnosis is confirmed through clinical evaluation and imaging studies showing irreversible damage to the limb.
Signs include severe limb ischemia, necrosis, or significant trauma; symptoms may include pain, swelling, and inability to ambulate.
Resolution criteria involve successful rehabilitation and adaptation to prosthetics, with no further complications.
Imaging findings may include angiography showing occluded vessels or MRI revealing extensive tissue damage.

Above The Knee Amputation

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Template 1

Template 2

Template 3

Template 4

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

What documentation is required for this code?

When should this code be used vs similar codes?

What are common billing issues with this code?

What procedures are commonly associated?

Above The Knee Amputation

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Template 1

Template 2

Template 3

Template 4

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

What documentation is required for this code?

When should this code be used vs similar codes?

What are common billing issues with this code?

What procedures are commonly associated?