The rash does not usually cross the body's midline. Less commonly, the rash can be more widespread and affect three or more dermatomes. This condition is called disseminated zoster. This generally occurs only in people with compromised or suppressed immune systems.
A person is not infectious before the blisters appear or after the rash has crusted over. For disseminated zoster, transmission occurs through airborne and droplet transmission, in addition to contact with fluid in the blisters of the rash. Disseminated zoster is likely as infectious as varicella.
ICD-10 code B02 for Zoster [herpes zoster] is a medical classification as listed by WHO under the range - Certain infectious and parasitic diseases .
B01. 9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2022 edition of ICD-10-CM B01.
A disseminated infection is one in which a localized infection spreads (disseminates) from one area of the body to other organ systems. While there are systemic infections that can affect the entire body at once, doctors will reserve the term for those infections that are normally constrained to a specific site.
This is because each nerve runs from one side of the spine in the back to the middle of the front of the body and does not cross this midline. This is important when considering the rash of shingles. The rash will occur in a dermatome and will not cross the midline of the body either in the front or the back.
22.
Post-herpetic neuralgia is a lasting pain in the areas of your skin where you had shingles. Around one in five people with shingles will get post-herpetic neuralgia. People age 50 and over are particularly at risk. Many people with post-herpetic neuralgia make a full recovery within a year.
Herpes zoster, or shingles, is a common viral infection of the nerves, which results in a painful rash of small blisters on a strip of skin anywhere on the body. Even after the rash is gone, the pain may continue for months.
Contact with and (suspected) exposure to varicella Z20. 820 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2022 edition of ICD-10-CM Z20. 820 became effective on October 1, 2021.
ICD-10-CM Code for Varicella [chickenpox] B01.
B01: Varicella [chickenpox]