ICD-10-CM tabular list

Chapter 21: Factors influencing health status and contact with health services

Z00-Z99

Chapter 21 of the ICD-10-CM tabular list covers factors influencing health status and contact with health services, codes Z00-Z99. It holds 1,844 codes across 15 blocks, of which 1,411 are billable and 433 are header codes that cannot go on a claim.

Notes

Additional guidance from the ICD-10-CM tabular list.

Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
(a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
(b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

Risk adjustment in Chapter 21

70 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 409 Amputation Status, Lower Limb/Amputation Complications
HCC 463 Artificial Openings for Feeding or Elimination
HCC 48 Morbid Obesity
HCC 221 Heart Transplant Status/Complications
HCC 211 Respirator Dependence/Tracheostomy Status/Complications
HCC 276 Lung Transplant Status/Complications

Notes

Risk adjustment in Chapter 21

Blocks in this chapter