Is ICD-10-CM code B05 billable?

No, B05 (Measles) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code B05 belong to?

B05 belongs to Chapter 1 of the ICD-10-CM tabular list: A00–B99 (Certain Infectious and Parasitic Diseases).

B05Not billable, use a more specific code below

Measles

In Viral infections characterized by skin and mucous membrane lesions (B00-B09), chapter 1: Certain Infectious and Parasitic Diseases

8 billable codes under B05: 2 are an MCC, 4 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

Instructional notes

Includes: conditions that are coded here

morbilli

Excludes1: not coded here, use a different code

subacute sclerosing panencephalitis (A81.1)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Rules for coding infections and parasitic diseases, including HIV, organism and drug resistance codes, sepsis and septic shock, MRSA, Zika, and COVID-19.

Human Immunodeficiency Virus (HIV) Infections (page 19)
Infectious agents as the cause of diseases classified to other chapters (page 22)
Infections resistant to antibiotics (page 22)
Sepsis, Severe Sepsis, and Septic Shock (page 23)
Methicillin Resistant Staphylococcus aureus (MRSA) Conditions (page 27)
Zika virus infections (page 28)
Coronavirus infections (page 28)

Read Section I.C.1 (page 19)

All codes under B05

B05 can't be used on a claim. Pick a billable code below; grey headings group them.

B05 MS-DRGs

As the principal diagnosis, the billable codes under B05 group to these 16 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 791 Prematurity with Major Problems (7 of 8 codes)
DRG 793 Full Term Neonate with Major Problems (7 of 8 codes)
DRG 865 Viral Illness with MCC (4 of 8 codes)
DRG 866 Viral Illness without MCC (4 of 8 codes)
DRG 023 Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator (1 of 8 codes)
DRG 024 Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC (1 of 8 codes)
DRG 097 Non-Bacterial Infection of Nervous System Except Viral Meningitis with MCC (1 of 8 codes)
DRG 098 Non-Bacterial Infection of Nervous System Except Viral Meningitis with CC (1 of 8 codes)
DRG 099 Non-Bacterial Infection of Nervous System Except Viral Meningitis without CC/MCC (1 of 8 codes)
DRG 124 Other Disorders of the Eye with MCC or Thrombolytic Agent (1 of 8 codes)
DRG 125 Other Disorders of the Eye without MCC (1 of 8 codes)
DRG 152 Otitis Media and URI with MCC (1 of 8 codes)
DRG 153 Otitis Media and URI without MCC (1 of 8 codes)
DRG 177 Respiratory Infections and Inflammations with MCC (1 of 8 codes)
DRG 178 Respiratory Infections and Inflammations with CC (1 of 8 codes)
DRG 179 Respiratory Infections and Inflammations without CC/MCC (1 of 8 codes)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Measles

Measles is an infectious disease caused by a virus. It spreads easily from person to person. It causes a blotchy red rash. The rash often starts on the head and moves down the body. Other symptoms include:

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.