AutoICD API

B27.1

Non-billable

Cytomegaloviral mononucleosis

Cytomegaloviral mononucleosis

This is a header/category code. For billing purposes, use a more specific child code from the list below.

Status

Non-billable / Header

Block

B25-B34

Parent Code

B27

Child Codes

4

Coding Notes

Includes

Conditions included under this code

  • diseases generally recognized as communicable or transmissible
  • glandular fever
  • monocytic angina
  • Pfeiffer's disease

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

  • certain localized infections - see body system-related chapters

Excludes 2

Conditions not included here, but the patient may have both

  • carrier or suspected carrier of infectious disease (Z22.-)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Additional codes that should follow this code

  • code to identify resistance to antimicrobial drugs (Z16.-)

Child Codes (4)

B27.10

Cytomegaloviral mononucleosis without complications

BillableB27.11

Cytomegaloviral mononucleosis with polyneuropathy

BillableB27.12

Cytomegaloviral mononucleosis with meningitis

BillableB27.19

Cytomegaloviral mononucleosis with other complication

Billable

Also Known As / Clinical Terms

UMLS

Frequently Asked Questions

What is ICD-10 code B27.1?

ICD-10-CM code B27.1 represents "Cytomegaloviral mononucleosis". It is a non-billable header code — use a more specific child code for billing purposes.

Is B27.1 a billable code?

No, B27.1 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 4 child codes under B27.1.

What chapter is B27.1 in?

B27.1 is in Chapter 1: Certain Infectious and Parasitic Diseases (codes A00-B99).

What codes cannot be used with B27.1?

B27.1 has Excludes1 notes indicating codes that cannot be used together with it, including: certain localized infections - see body system-related chapters.

What are the subcategories under B27.1?

B27.1 has 4 child codes, including: 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).

Are additional codes required with B27.1?

Yes, when using B27.1 you should also code: code to identify resistance to antimicrobial drugs (Z16.-).

What are the UMLS CUIs for B27.1?

B27.1 is linked to 1 UMLS Concept Unique Identifier: C0276254. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

Automate ICD-10 Coding With AI

Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.

Try FreeView API Docs

Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.