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A49.01
ICD-10-CM
MSSA Infection

Learn about MSSA infection diagnosis, including clinical documentation, medical coding (ICD-10 codes like A49.02, B95.61, L03.115 as applicable), and healthcare guidelines. Find information on Methicillin-sensitive Staphylococcus aureus infections, treatment, and prevention strategies. This resource supports accurate clinical documentation and appropriate medical coding for healthcare professionals dealing with MSSA.

Also known as

Methicillin-Susceptible Staphylococcus Aureus
Staph aureus infection

Diagnosis Snapshot

Key Facts
  • Definition : Infection caused by Methicillin-Sensitive Staphylococcus aureus bacteria.
  • Clinical Signs : Skin infections (boils, abscesses), pneumonia, sepsis. Can range from mild to severe.
  • Common Settings : Community-acquired, hospitals, nursing homes. Spreads through contact.

Related ICD-10 Code Ranges

Complete code families applicable to AAPC A49.01 Coding
A49.01-A49.02

Staphylococcal infection

MSSA skin and soft tissue infections.

J15.20-J15.21

Staphylococcal pneumonia

Pneumonia caused by MSSA bacteria.

B95.61-B95.69

Methicillin susc staph as cause

MSSA specified as the cause of other diseases.

A00-B99

Certain infectious and parasitic diseases

Broader category encompassing various infectious diseases, including some MSSA infections.

Code-Specific Guidance

Decision Tree for

Follow this step-by-step guide to choose the correct ICD-10 code.

Is the MSSA infection localized?

Code Comparison

Related Codes Comparison

When to use each related code

Description
MSSA Infection
Staph Aureus Infection NOS
Impetigo

Documentation Best Practices

Documentation Checklist
  • Document positive MSSA culture (site)
  • Record S/S: cellulitis, abscess, etc.
  • Note infection location, severity, onset
  • Document prior infections & treatments
  • Include antibiotic susceptibility results

Coding and Audit Risks

Common Risks
  • Unspecified Site

    Coding MSSA infection without specifying the site of infection leads to inaccurate reporting and potential DRG misassignment. Use specific ICD-10-CM codes.

  • Methicillin Resistance

    Failure to accurately document and code methicillin resistance (e.g., using unspecified Staphylococcus aureus codes) impacts infection control tracking and reimbursement.

  • Clinical Validation

    Lack of proper clinical indicators in documentation to support MSSA diagnosis may trigger audit scrutiny for medical necessity and reimbursement validity. CDI review crucial.

Mitigation Tips

Best Practices
  • Document MRSA risk factors: prior infections, hospitalizations
  • Specific Sx, wound details improve MSSA Dx coding accuracy
  • Order appropriate cultures, sensitivity tests for confirmation
  • Distinguish community vs hospital-acquired MSSA for CDI
  • Adhere to antibiotic guidelines for compliance, reduce resistance

Clinical Decision Support

Checklist
  • Verify purulent drainage, abscess, or cellulitis
  • Confirm positive MSSA culture from site
  • Rule out MRSA via susceptibility testing
  • Document infection site, severity, and response

Reimbursement and Quality Metrics

Impact Summary
  • MSSA Infection reimbursement hinges on accurate ICD-10-CM coding (e.g., A49.02) and appropriate DRG assignment for optimal payment.
  • Coding quality directly impacts MSSA Infection case mix index (CMI) accuracy, affecting hospital reimbursement and quality reporting.
  • Timely and specific documentation of MSSA Infection is crucial for appropriate antibiotic usage reporting and minimizing claim denials.
  • Accurate present on admission (POA) indicator for MSSA Infection influences hospital-acquired infection reporting and potential penalties.

Streamline Your Medical Coding

Let S10.AI help you select the most accurate ICD-10 codes. Our AI-powered assistant ensures compliance and reduces coding errors.

Quick Tips

Practical Coding Tips
  • Code MSSA confirmed by culture
  • Document abscess, cellulitis location
  • Specify site of infection for S. aureus
  • Use additional codes for complications
  • Check ICD-10-CM guidelines for MRSA

Documentation Templates

Patient presents with signs and symptoms consistent with Methicillin-Susceptible Staphylococcus Aureus (MSSA) infection.  Clinical findings include [localized or systemic infection descriptor, e.g., cellulitis of the left lower extremity,  pneumonia, bacteremia].  Area of infection exhibits [description of affected area, e.g., erythema, edema, warmth, purulent drainage, induration]. Patient reports [associated symptoms, e.g., pain, fever, chills, malaise].  Differential diagnosis includes [list relevant differential diagnoses, e.g.,  streptococcal infection, other bacterial infections, abscess].  Laboratory results show [mention specific lab tests and results, e.g., positive wound culture for MSSA, elevated white blood cell count, leukocytosis].  Based on the clinical presentation, laboratory findings, and diagnostic criteria, the diagnosis of MSSA infection is confirmed. Treatment plan includes [specific antibiotics, e.g., Cefazolin, Dicloxacillin,  Nafcillin] administered [route of administration, e.g., intravenously, orally] for [duration] along with [supportive measures, e.g., wound care, pain management, incision and drainage].  Patient education provided regarding medication adherence, infection control measures, and potential complications. Follow-up scheduled in [timeframe] to assess treatment response and monitor for any signs of clinical deterioration or treatment failure.  ICD-10 code [appropriate ICD-10 code based on infection site and type] and CPT codes [relevant CPT codes for procedures performed, e.g., incision and drainage, wound debridement] will be documented for billing and coding purposes.