B27.81 Other infectious mononucleosis with polyneuropathy

✓ Billable ICD-10-CM 2026
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The ICD-10-CM code for Other infectious mononucleosis with polyneuropathy is B27.81 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Section
B25-B34: Other viral diseases (B25-B34)
Category B27
21 codes (16 billable)
FY2026 Status
Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to B27.81:

  • Mononucleosis, infectious › specified NEC › with › polyneuropathy

Official Coding Guidelines

HIV Infections (TOC entry)

a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.1.a
Infectious agents causing diseases in other chapters (TOC)

b. Infectious agents as the cause of diseases classified to other chapters ................................. 22

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.1.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

Parent Code

B27 Infectious mononucleosis

Related Codes in B27

B27 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 B27.82 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
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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