Mumps
In Other viral diseases (B25-B34), chapter 1: Certain Infectious and Parasitic Diseases
11 billable codes under B26: 2 are an MCC, 8 are a CC; 1 map to HCC 92 (Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.
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Instructional notes
Includes: conditions that are coded here
- epidemic parotitis
- infectious parotitis
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)
All codes under B26
B26 can't be used on a claim. Pick a billable code below; grey headings group them.
B26 MS-DRGs
As the principal diagnosis, the billable codes under B26 group to these 21 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 (10 of 11 codes)
- DRG 793 Full Term Neonate with Major Problems (10 of 11 codes)
- DRG 865 Viral Illness with MCC (5 of 11 codes)
- DRG 866 Viral Illness without MCC (5 of 11 codes)
- DRG 023 Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator (2 of 11 codes)
- DRG 024 Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC (2 of 11 codes)
- DRG 073 Cranial and Peripheral Nerve Disorders with MCC (1 of 11 codes)
- DRG 074 Cranial and Peripheral Nerve Disorders without MCC (1 of 11 codes)
- DRG 075 Viral Meningitis with CC/MCC (1 of 11 codes)
- DRG 076 Viral Meningitis without CC/MCC (1 of 11 codes)
- DRG 097 Non-Bacterial Infection of Nervous System Except Viral Meningitis with MCC (1 of 11 codes)
- DRG 098 Non-Bacterial Infection of Nervous System Except Viral Meningitis with CC (1 of 11 codes)
- DRG 099 Non-Bacterial Infection of Nervous System Except Viral Meningitis without CC/MCC (1 of 11 codes)
- DRG 438 Disorders of Pancreas Except Malignancy with MCC (1 of 11 codes)
- DRG 439 Disorders of Pancreas Except Malignancy with CC (1 of 11 codes)
- DRG 440 Disorders of Pancreas Except Malignancy without CC/MCC (1 of 11 codes)
- DRG 441 Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with MCC (1 of 11 codes)
- DRG 442 Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with CC (1 of 11 codes)
- DRG 443 Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis without CC/MCC (1 of 11 codes)
- DRG 727 Inflammation of the Male Reproductive System with MCC (1 of 11 codes)
- DRG 728 Inflammation of the Male Reproductive System without MCC (1 of 11 codes)
Other codes that refer to B26
Notes on these codes point to B26.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Mumps
Mumps is an illness caused by the mumps virus. It starts with: After that, the salivary glands under the ears or jaw become swollen and tender. The swelling can be on one or both sides of the face. Symptoms last 7 to 10 days. Serious complications are rare.
Read more about mumps on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.