ICD-10-CM tabular list

Chapter 1: Certain infectious and parasitic diseases

A00-B99

Chapter 1 of the ICD-10-CM tabular list covers certain infectious and parasitic diseases, codes A00-B99. It holds 1,309 codes across 22 blocks, of which 1,068 are billable and 241 are header codes that cannot go on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

certain localized infections - see body system-related chapters

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code 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

Add a secondary code to capture the detail described below.

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

Includes

Conditions this code covers.

diseases generally recognized as communicable or transmissible

Risk adjustment in Chapter 1

113 of this chapter’s codes map to a CMS-HCC, which means the diagnosis carries a risk-adjustment payment when it is documented and coded to the level the record supports.

HCC 6 Opportunistic Infections
HCC 2 Septicemia, Sepsis, Systemic Inflammatory Response Syndrome/Shock
HCC 92 Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis
HCC 127 Dementia, Mild or Unspecified
HCC 65 Chronic Hepatitis
HCC 182 Spinal Cord Disorders/Injuries

Excludes1 — never code together

Excludes2 — not included here, but may coexist

Use additional code

Includes

Risk adjustment in Chapter 1

Blocks in this chapter