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Official Description

Culture, bacterial; quantitative, anaerobic with isolation and presumptive identification of isolates, any source except urine, blood or stool

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 87073 refers to a specific laboratory procedure known as a bacterial culture, which is performed to identify and quantify anaerobic bacteria from various tissue samples. In this context, "anaerobic" refers to bacteria that thrive in environments devoid of oxygen. The procedure involves collecting a sample from a source other than urine, blood, or stool, which may include tissues or other bodily fluids. Once the sample is obtained, it is placed in a specialized culture medium that promotes the growth of anaerobic bacteria. The laboratory then monitors the culture for bacterial growth, allowing for the identification of the types of bacteria present and the quantification of their numbers. This process is crucial for diagnosing infections caused by anaerobic bacteria, which can be challenging to detect due to their unique growth requirements. The results of this culture can provide valuable information for guiding appropriate treatment options for patients with suspected infections involving anaerobic organisms.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The procedure associated with CPT® Code 87073 is indicated for the evaluation of infections suspected to be caused by anaerobic bacteria. This may include conditions where traditional aerobic cultures have failed to identify the causative organism, or in cases where the clinical presentation suggests the involvement of anaerobic pathogens. The following are specific indications for performing this test:

  • Infection Diagnosis The test is performed when there is a clinical suspicion of an infection caused by anaerobic bacteria, which may not be detectable through standard culture methods.
  • Abscess Evaluation It is indicated in the assessment of abscesses, particularly those located in areas where anaerobic bacteria are commonly found, such as the gastrointestinal tract or deep tissue.
  • Wound Infections The procedure is useful for evaluating chronic or non-healing wounds that may harbor anaerobic organisms.
  • Respiratory Infections It may be indicated in cases of aspiration pneumonia or lung abscesses where anaerobic bacteria are suspected.

2. Procedure

The procedure for CPT® Code 87073 involves several critical steps to ensure accurate culture and identification of anaerobic bacteria. The following outlines the procedural steps:

  • Sample Collection A sample is collected from a source other than urine, blood, or stool. This may involve obtaining tissue, aspirates, or other fluids that are suspected to contain anaerobic bacteria. Proper aseptic techniques are employed to prevent contamination during the collection process.
  • Sample Preparation The collected sample is then placed into a culture medium specifically designed to support the growth of anaerobic bacteria. This medium is often enriched with nutrients that facilitate bacterial proliferation while inhibiting the growth of aerobic organisms.
  • Incubation The culture is incubated in an anaerobic environment, which may involve the use of anaerobic jars or chambers that maintain low oxygen levels. The incubation period typically lasts for 24 to 48 hours, during which the bacteria multiply.
  • Observation and Identification After the incubation period, the culture is examined for signs of bacterial growth. Any colonies that develop are then subjected to further testing for presumptive identification, which may include biochemical tests or microscopy to determine the specific types of anaerobic bacteria present.

3. Post-Procedure

Following the completion of the culture procedure, the laboratory will analyze the results and prepare a report detailing the types and quantities of anaerobic bacteria identified. Clinicians will use this information to guide treatment decisions, which may include the selection of appropriate antibiotics. It is important for healthcare providers to consider the possibility of mixed infections, as anaerobic bacteria often coexist with other types of bacteria. Additionally, the turnaround time for results can vary, and clinicians should be aware of this when making treatment plans. In some cases, further testing may be required based on the initial findings to ensure comprehensive management of the patient's condition.

Short Descr CULTURE BACTERIA ANAEROBIC
Medium Descr CUL BACT QUAN ANAERC ISOL XCPT UR BLOOD/STOOL
Long Descr Culture, bacterial; quantitative, anaerobic with isolation and presumptive identification of isolates, any source except urine, blood or stool
Status Code Statutory Exclusion (from MPFS, may be paid under other methodologies)
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 9 - Not Applicable
Multiple Procedures (51) 9 - Concept does not apply.
Bilateral Surgery (50) 9 - Concept does not apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 9 - Concept does not apply.
Co-Surgeons (62) 9 - Concept does not apply.
Team Surgery (66) 9 - Concept does not apply.
Diagnostic Imaging Family 99 - Concept Does Not Apply
CLIA Waived (QW) No
APC Status Indicator Conditionally packaged laboratory tests
Type of Service (TOS) 5 - Diagnostic Laboratory
Berenson-Eggers TOS (BETOS) T1F - Lab tests - bacterial cultures
MUE 2
CCS Clinical Classification 206 - Microscopic examination (bacterial smear, culture, toxicology)
Q4 Service for ordering/referring physician qualifies as a service exemption
26 Professional component: certain procedures are a combination of a physician or other qualified health care professional component and a technical component. when the physician or other qualified health care professional component is reported separately, the service may be identified by adding modifier 26 to the usual procedure number.
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
90 Reference (outside) laboratory: when laboratory procedures are performed by a party other than the treating or reporting physician or other qualified health care professional, the procedure may be identified by adding modifier 90 to the usual procedure number.
91 Repeat clinical diagnostic laboratory test: in the course of treatment of the patient, it may be necessary to repeat the same laboratory test on the same day to obtain subsequent (multiple) test results. under these circumstances, the laboratory test performed can be identified by its usual procedure number and the addition of modifier 91. note: this modifier may not be used when tests are rerun to confirm initial results; due to testing problems with specimens or equipment; or for any other reason when a normal, one-time, reportable result is all that is required. this modifier may not be used when other code(s) describe a series of test results (eg, glucose tolerance tests, evocative/suppression testing). this modifier may only be used for laboratory test(s) performed more than once on the same day on the same patient.
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
GW Service not related to the hospice patient's terminal condition
RT Right side (used to identify procedures performed on the right side of the body)
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
Date
Action
Notes
2001-01-01 Added First appearance in code book in 2001.
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Description
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