ICD-10-CM Billable Code

B27.10

Cytomegaloviral mononucleosis without complications

Clinical Classification Guidelines

Medical Intelligence & Overview

Cytomegaloviral mononucleosis, commonly referred to as CMV mononucleosis, is a viral infection caused by the cytomegalovirus (CMV). This condition is characterized by an illness that resembles infectious mononucleosis and is often seen in individuals with weakened immune systems. When classified without complications under ICD-10 code B27.10, it indicates a case where the infection has not caused additional health issues such as organ damage or secondary infections. Recognizing the symptoms and understanding the nature of the disease can help in managing the condition effectively.

Causes & Symptoms

Clinical Causes: Primary infection with the cytomegalovirus (CMV), which can be transmitted through bodily fluids such as saliva, blood, urine, semen, and breast milk. Close personal contact with someone who is infected, especially in settings like households, daycare centers, or healthcare facilities. Blood transfusions, organ transplants, or usage of contaminated medical equipment. Mother-to-child transmission during pregnancy, childbirth, or breastfeeding, though this is less common in non-complicated cases.

Key Symptoms: Fever Fatigue and weakness Sore throat Swollen lymph nodes, particularly in the neck and armpits Muscle aches Headache Splenomegaly (enlarged spleen) Mild skin rashes or rash-like symptoms Loss of appetite

Diagnostic & Treatment

Diagnosis Path: Diagnosis typically involves a combination of clinical evaluation and laboratory testing. Healthcare providers may perform blood tests to detect antibodies against CMV or identify the virus itself through molecular techniques like polymerase chain reaction (PCR). Routine complete blood counts (CBC) may show atypical lymphocytes, which can suggest infectious mononucleosis. Since symptoms often overlap with other illnesses, specific tests for CMV help confirm the diagnosis.

Treatment Protocols: For cytomegaloviral mononucleosis without complications, treatment usually focuses on supportive care, including rest, hydration, and over-the-counter medications to relieve symptoms such as fever and sore throat. Most cases resolve on their own over time. In some instances, especially in immunocompromised individuals, antiviral medications may be prescribed. Regular follow-up with healthcare providers is important for monitoring recovery and managing any emerging issues.

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

Clinical Advice & FAQs

Billing Guidance

Is B27.10 a billable ICD-10 code?
Yes, B27.10 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.

Documentation

How do I report B27.10?
Clinical documentation must specify the nature of Cytomegaloviral mononucleosis without complications and any associated comorbidities for accurate reporting.

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