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ICD-10 Guide
DiagnosesAapc

Aapc

ICD-10 Coding for AAPC ICD-10-CM Coding(A41.54, I12.9)

PRIMARY SPECIALTYInfectious Disease
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Aapc?
Essential facts and insights about AAPC ICD-10-CM Coding

Key Clinical Considerations:

  • Presence of sepsis due to Methicillin susceptible Staphylococcus aureus
  • Chronic kidney disease not specified as stage 5 or end stage kidney disease

Clinical Information

Clinical Criteria & Documentation Requirements

  • Detailed documentation of the patient's symptoms and diagnosis
  • Specific identification of the causative organism

Coding Guidelines

Usage Guidelines & Examples

  • A41.54 is specific for sepsis due to Methicillin susceptible Staphylococcus aureus, while other codes in the A41 series are used for sepsis due to other organisms
  • I12.9 is a nonspecific code for hypertensive chronic kidney disease, and should be used when the stage of kidney disease is not documented

Code Exclusions

Important Exclusions

  • Sepsis due to Methicillin resistant Staphylococcus aureus
  • Hypertensive chronic kidney disease with stage 5 or end stage kidney disease

Related ICD-10 Codes

Primary Codes
A41.54
Sepsis due to Methicillin susceptible Staphylococcus aureus
I12.9
Hypertensive chronic kidney disease with stage 1 through stage 4, or unspecified kidney disease
Differential Codes
A41.9
A41.54
when specific organism is identified.
I11.0
I12.9
for CKD,
I11.0
for heart failure.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Infectious Disease

Specialty Applications

  • Patients diagnosed with sepsis due to Methicillin susceptible Staphylococcus aureus
  • Patients diagnosed with hypertensive chronic kidney disease without a specified stage

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

Patient presents with sepsis due to Methicillin susceptible Staphylococcus aureus, as confirmed by culture results.

Template 2

Patient diagnosed with hypertensive chronic kidney disease. Stage of kidney disease not specified in the documentation.

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

Can A41.54 be used for sepsis due to other types of Staphylococcus aureus?

No, A41.54 is specific for Methicillin susceptible Staphylococcus aureus. Other codes in the A41 series are used for sepsis due to other organisms.

When should I12.9 be used?

I12.9 should be used when a patient has hypertensive chronic kidney disease, but the stage of kidney disease is not specified in the documentation.