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v1.0.0
ICD-10 Guide
DiagnosesNosocomial Pneumonia

Nosocomial Pneumonia

ICD-10 Coding for Nosocomial Pneumonia(J15.212, J18.9)

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

Diagnosis Overview

What is Nosocomial Pneumonia?
Essential facts and insights about Nosocomial Pneumonia

Key Clinical Considerations:

  • Fever, cough, purulent sputum, dyspnea
  • Chest X-ray showing new infiltrates, sputum culture positive for pathogens
  • Decreased breath sounds, crackles on auscultation, dullness to percussion

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient's admission date, onset of symptoms, causative organism if identified
  • ICD-10-CM codes for pneumonia, specify 'nosocomial' or 'hospital-acquired'
  • Example: 'Patient developed pneumonia 3 days post-admission, confirmed by culture.'

Coding Guidelines

Usage Guidelines & Examples

  • Use J18.9 for unspecified pneumonia; J15.9 for bacterial pneumonia.
  • Common errors include misclassifying community-acquired pneumonia as nosocomial.

Code Exclusions

Important Exclusions

  • Community-acquired pneumonia, aspiration pneumonia
  • Codes for viral pneumonia or other specific etiologies

Related ICD-10 Codes

Primary Codes
J18.9
Pneumonia, unspecified
J18.1
Lobar pneumonia, unspecified
J15.9
Bacterial pneumonia, unspecified
Ancillary Codes
R65.1
R89.7
Differential Codes
J18.9
J18.9
when the organism is not specified or identified.
J15.212
J15.212
when MRSA is confirmed.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Pulmonology

Specialty Applications

  • Patients hospitalized for more than 48 hours, ICU patients, post-operative patients
  • Acute care hospitals, long-term acute care facilities

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

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

Documentation requirements?

Document onset, causative organism, and treatment response.

Billing considerations?

Ensure accurate coding to reflect severity and length of stay.