ICD-10 Code
International Classification of Diseases, 10th Revision
Mar 21, 2019

See: Infectious mononucleosis

B27 is NOT a complete or valid ICD 10 diagnosis code.

You should code each health care encounter to the level of certainty known for that encounter. When sufficient clinical information is not known or available to assign a more specific code, it is acceptable to report the appropriate unspecified code.

See below for more specifc codes relating to
Infectious mononucleosis
  • glandular fever
  • monocytic angina
  • Pfeiffer's disease

More specific codes for Infectious mononucleosis

  • B27.0 - Gammaherpesviral mononucleosis
    • B27.00 - Gammaherpesviral mononucleosis without complication
    • B27.01 - Gammaherpesviral mononucleosis with polyneuropathy
    • B27.02 - Gammaherpesviral mononucleosis with meningitis
    • B27.09 - Gammaherpesviral mononucleosis with other complications
  • B27.1 - Cytomegaloviral mononucleosis
    • B27.10 - Cytomegaloviral mononucleosis without complications
    • B27.11 - Cytomegaloviral mononucleosis with polyneuropathy
    • B27.12 - Cytomegaloviral mononucleosis with meningitis
    • B27.19 - Cytomegaloviral mononucleosis with other complication
  • B27.8 - Other infectious mononucleosis
    • B27.80 - Other infectious mononucleosis without complication
    • B27.81 - Other infectious mononucleosis with polyneuropathy
    • B27.82 - Other infectious mononucleosis with meningitis
    • B27.89 - Other infectious mononucleosis with other complication
  • B27.9 - Infectious mononucleosis, unspecified
    • B27.90 - Infectious mononucleosis, unspecified without complication
    • B27.91 - Infectious mononucleosis, unspecified with polyneuropathy
    • B27.92 - Infectious mononucleosis, unspecified with meningitis
    • B27.99 - Infectious mononucleosis, unspecified with other complication
See also ICD 10 code for
Back to B27
See the ICD-10-CM Coding Guidelines.

Questions related to B27 Infectious mononucleosis

When ICD 10 was implemented on October 1, 2015, it did not affect physicians', outpatient facilities', and hospital outpatient departments' use of CPT codes on Medicare Fee-For-Service claims. Providers should continue to use CPT codes to report these services.