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Official Description

Heterophile antibodies; screening

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 86308 refers to a laboratory test that screens for heterophile antibodies, which are antibodies that may indicate the presence of the Epstein-Barr virus (EBV). This virus is known to cause infectious mononucleosis (IM), a condition characterized by symptoms such as fever, sore throat, swollen lymph nodes, and fatigue. The screening test, commonly known as the Infectious Mononucleosis Slide Test by LA, is typically ordered when a patient presents with clinical signs suggestive of IM. It is important to note that the test may yield negative results during the early stages of the infection, necessitating a repeat test if symptoms continue. Additionally, infants and young children generally do not produce heterophile antibodies, resulting in negative test outcomes even in cases of confirmed EBV infection. The procedure involves obtaining a blood sample through venipuncture, which is separately reportable. The serum or plasma obtained from the blood sample is then analyzed using a semiquantitative latex agglutination method to detect the presence of heterophile antibodies.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The screening for heterophile antibodies using CPT® Code 86308 is indicated in the following scenarios:

  • Symptoms of Infectious Mononucleosis (IM) The test is performed when a patient exhibits symptoms suggestive of IM, which may include fever, headache, sore throat, swollen glands, fatigue or weakness, enlarged liver or spleen, abdominal pain, or rash.
  • Persistent Symptoms If a patient continues to show symptoms of IM despite initial negative test results, the test may be repeated to confirm the presence of heterophile antibodies.
  • Age Considerations While the test is useful for older children and adults, it is important to note that infants and young children typically do not produce heterophile antibodies, leading to negative results even in the presence of EBV infection.

2. Procedure

The procedure for screening heterophile antibodies involves several key steps:

  • Blood Sample Collection A blood sample is obtained from the patient through a process known as venipuncture. This step is crucial as it provides the serum or plasma needed for testing. The venipuncture must be reported separately for billing purposes.
  • Serum/Plasma Preparation Once the blood sample is collected, the serum or plasma is separated from the cellular components of the blood. This preparation is essential for accurate testing of heterophile antibodies.
  • Testing Methodology The prepared serum or plasma is then subjected to a semiquantitative latex agglutination test, which is designed to detect the presence of heterophile antibodies. This method involves mixing the serum with latex particles coated with antigens that react with the heterophile antibodies, leading to visible agglutination if antibodies are present.

3. Post-Procedure

After the procedure, the patient may not require any specific post-procedure care. However, it is important to monitor the patient for any ongoing symptoms of infectious mononucleosis. If the initial test result is negative but symptoms persist, a repeat test may be warranted to confirm the presence of heterophile antibodies. Additionally, healthcare providers should inform patients that infants and young children may not produce detectable levels of heterophile antibodies, and alternative testing methods may be necessary in these cases.

Short Descr HETEROPHILE ANTIBODY SCREEN
Medium Descr HETEROPHILE ANTIBODIES SCREEN
Long Descr Heterophile antibodies; screening
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) Yes
APC Status Indicator Conditionally packaged laboratory tests
Type of Service (TOS) 5 - Diagnostic Laboratory
Berenson-Eggers TOS (BETOS) T1H - Lab tests - other (non-Medicare fee schedule)
MUE 1
CCS Clinical Classification 235 - Other Laboratory
QW Clia waived test
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.
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.
Q4 Service for ordering/referring physician qualifies as a service exemption
X1 Continuous/broad services: for reporting services by clinicians, who provide the principal care for a patient, with no planned endpoint of the relationship; services in this category represent comprehensive care, dealing with the entire scope of patient problems, either directly or in a care coordination role; reporting clinician service examples include, but are not limited to: primary care, and clinicians providing comprehensive care to patients in addition to specialty care
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.
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.
CR Catastrophe/disaster related
GA Waiver of liability statement issued as required by payer policy, individual case
GC This service has been performed in part by a resident under the direction of a teaching physician
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
GY Item or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit
GZ Item or service expected to be denied as not reasonable and necessary
PD Diagnostic or related non diagnostic item or service provided in a wholly owned or operated entity to a patient who is admitted as an inpatient within 3 days
Q5 Service furnished under a reciprocal billing arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
QP Documentation is on file showing that the laboratory test(s) was ordered individually or ordered as a cpt-recognized panel other than automated profile codes 80002-80019, g0058, g0059, and g0060.
SA Nurse practitioner rendering service in collaboration with a physician
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
2013-01-01 Changed Short Descriptor changed.
1993-01-01 Added First appearance in code book in 1993.
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Description
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