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ICD-10 Guide
ICD-10 CodesA49

A49

Bacterial infection, unspecified site

BILLABLE STATUSNo
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED08/28/2025

Code Description

ICD-10 A49 is a used to indicate a diagnosis of bacterial infection, unspecified site.

Key Diagnostic Point:

Sepsis due to unspecified organism.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Standard complexity factors

Audit Risk Factors

  • Standard audit considerations

Specialty Focus

Coding Guidelines

Inclusion Criteria

Use A49 When
  • The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD
  • CM) is a system used by physicians and other healthcare providers to classify and document diseases and symptoms observed in their patients
  • For ICD
  • 10 code A49, which represents bacterial infection of unspecified site, the following official coding guidelines are applicable:
  • It includes criteria that are unspecified bacterial infections
  • Code First/Also: As per ICD
  • 10 CM guidelines, the "Code First" note instructs that certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology
  • For such conditions, the ICD

Exclusion Criteria

Do NOT use A49 When
  • Inclusion and Exclusion Criteria: As the code A49 is for bacterial infection of unspecified site, it is used when the exact location of the infection is not specified in the medical record
  • However, it excludes specified forms of bacterial infections, which should be specified using more detailed codes

Related Codes

Child Codes

8 codes
A49.0
Streptococcal sore throat
A49.01
Methicillin susceptible Staphylococcus aureus infection, unspecified site
A49.02
Methicillin resistant Staphylococcus aureus infection, unspecified site
A49.1
Legionnaires' disease
A49.2
Bacterial infection of unspecified site, unspecified.
A49.3
Acute bacterial prostatitis
A49.8
Other bacterial diseases, not elsewhere classified
A49.9
Bacterial infection, unspecified

Related CPT Codes

No CPT Codes Available

Related CPT codes for this diagnosis will be displayed here when available.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

ICD-10 is the 10th iteration of the International Classification of Diseases, used to assign codes to particular medical diagnoses, conditions, and procedures. The implementation of ICD-10 signifies an overhaul in coding for all health conditions, including A49 (Bacterial infection of unspecified site), which with this system becomes defined as a "non-billable" code.
1. Specificity: ICD-10 provides a much higher level of specificity than its predecessor ICD-9. In the case of code A49, it signifies a bacterial infection of unspecified site. However, additional codes under the A49 could be employed to provide further details about the type of bacterial infection, such as A49.01 (Streptococcal infection of unspecified site) or A49.02 (Staphylococcal infection of unspecified site). Such detailed annotation helps healthcare providers to showcase the exact diagnosis which impacts the treatment plan.
2. Reimbursement: The status of A49 as a "non-billable or non-specific" code significantly impacts the reimbursement process. Non-billable codes are considered as headers and not detailed enough to be used for billing purposes directly. Instead, they require additional characters for higher specificity to ensure accurate reimbursement. The introduction of ICD-10 brings about changes to reimbursement rates, as the level of specificity changes the cost of care and thus reimbursement claims.

ICD-9 vs ICD-10

ICD-10 is the 10th iteration of the International Classification of Diseases, used to assign codes to particular medical diagnoses, conditions, and procedures. The implementation of ICD-10 signifies an overhaul in coding for all health conditions, including A49 (Bacterial infection of unspecified site), which with this system becomes defined as a "non-billable" code. Impacts: 1. Specificity: ICD-10 provides a much higher level of specificity than its predecessor ICD-9. In the case of code A49, it signifies a bacterial infection of unspecified site. However, additional codes under the A49 could be employed to provide further details about the type of bacterial infection, such as A49.01 (Streptococcal infection of unspecified site) or A49.02 (Staphylococcal infection of unspecified site). Such detailed annotation helps healthcare providers to showcase the exact diagnosis which impacts the treatment plan. 2. Reimbursement: The status of A49 as a "non-billable or non-specific" code significantly impacts the reimbursement process. Non-billable codes...

Reimbursement & Billing Impact

Reimbursement: The status of A49 as a "non-billable or non-specific" code significantly impacts the reimbursement process. Non-billable codes are considered as headers and not detailed enough to be used for billing purposes directly. Instead, they require additional characters for higher specificity to ensure accurate reimbursement. The introduction of ICD-10 brings about changes to reimbursement rates, as the level of specificity changes the cost of care and thus reimbursement claims.

Resources

Clinical References

No clinical reference resources available for this code.

Coding & Billing References

No coding and billing reference resources available for this code.

Frequently Asked Questions

Q: What does ICD-10 code A49 represent?

A: ICD-10 code A49 represents bacterial infection of unspecified site. This code is used to denote cases where a bacterial infection is present, but the exact site or type of bacterium causing the infection is not specified.

Q: Why is code A49 described as non-billable?

A: The ICD-10 code A49 is considered non-billable because it is too general to represent a specific diagnosis that could be used for claim submission. To make it billable, more detailed information regarding the type of bacteria or the specific site of the infection would be required.

Q: Can I use A49 on medical billing claims?

A: Generally, you cannot use A49 on medical billing claims because it is non-specific. It's essential to use a more precise code that specifies the type and location of the bacterial infection for billing purposes.

Q: What are potential scenarios where code A49 might be used?

A: A49 might be used in preliminary documentation or during a patient’s initial visit to indicate the presence of a bacterial infection before more specific tests are completed. After receiving test results, the physician would likely update the code to a more specific one.

Q: Which categories of diseases is code A49 related to?

A: Code A49 falls under the category of "A00-A79 – Infectious and Parasitic Diseases". This group includes a wide range of infections and diseases caused by bacteria, parasites, and other microorganisms.

Q: How should medical professionals accurately document conditions represented by code A49?

A: When code A49 is initially used, healthcare professionals should include any information on the symptoms or conditions related to the suspected bacterial infection. Once additional information is obtained, the code should be updated to a billable code that details the specific infection and its location.