Valid for Submission
B27.99 is a billable diagnosis code used to specify a medical diagnosis of infectious mononucleosis, unspecified with other complication. The code B27.99 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.
The ICD-10-CM code B27.99 might also be used to specify conditions or terms like african burkitt's lymphoma, dacryoadenitis due to infectious mononucleosis, encephalitis due to herpesviridae, epstein barr virus infection of the central nervous system, fatal infectious mononucleosis , fatal infectious mononucleosis associated with x-linked lymphoproliferative syndrome, etc.
Unspecified diagnosis codes like B27.99 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code B27.99:
Inclusion TermsInclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Hepatomegaly in unspecified infectious mononucleosis
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code B27.99 are found in the index:
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- African Burkitt's lymphoma
- Dacryoadenitis due to infectious mononucleosis
- Encephalitis due to Herpesviridae
- Epstein Barr virus infection of the central nervous system
- Fatal infectious mononucleosis
- Fatal infectious mononucleosis associated with X-linked lymphoproliferative syndrome
- Infection of lacrimal gland
- Infectious mononucleosis encephalitis
- Infectious mononucleosis exanthem
- Infectious mononucleosis pneumonia
- Pericarditis associated with infectious mononucleosis
- Viral pericarditis
Diagnostic Related Groups - MS-DRG Mapping
Convert B27.99 to ICD-9 Code
The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code B27.99 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.
Information for Patients
Infectious mononucleosis, or "mono", is an infection usually caused by the Epstein-Barr virus. The virus spreads through saliva, which is why it's sometimes called "kissing disease." Mono occurs most often in teens and young adults. However, you can get it at any age. Symptoms of mono include
- Sore throat
- Swollen lymph glands
Sometimes you may also have a swollen spleen. Serious problems are rare.
A blood test can show if you have mono. Most people get better in two to four weeks. However, you may feel tired for a few months afterward. Treatment focuses on helping symptoms and includes medicines for pain and fever, warm salt water gargles and plenty of rest and fluids.
[Learn More in MedlinePlus]