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ICD-10-CM tabular list

Z40-Z53 — Encounters for other specific health care

ICD-10-CM codes Z40-Z53 cover encounters for other specific health care, within factors influencing health status and contact with health services. The block holds 221 codes across 13 categories, of which 164 are billable and 57 are header codes that cannot be submitted on a claim.

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.

  • follow-up examination for medical surveillance after treatment (Z08-Z09)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Categories Z40-Z53 are intended for use to indicate a reason for care. They may be used for patients who have already been treated for a disease or injury, but who are receiving aftercare or prophylactic care, or care to consolidate the treatment, or to deal with a residual state

Risk adjustment in Z40-Z53

0 codes in this block map to a CMS-HCC, which means the diagnosis carries a risk-adjustment payment when it is documented and coded. Under-coding here is money left on the table; over-coding here is what audits are for.

  • HCC 409 Amputation Status, Lower Limb/Amputation Complications
  • HCC 463 Artificial Openings for Feeding or Elimination
  • HCC 276 Lung Transplant Status/Complications
  • HCC 221 Heart Transplant Status/Complications
  • HCC 62 Liver Transplant Status/Complications
  • HCC 454 Stem Cell, Including Bone Marrow, Transplant Status/Complications

What else to watch in Z40-Z53

  • 18 codes are laterality-specific. They come in left and right pairs, and the pair is mutually exclusive on a single site: coding both without a bilateral code is a contradiction a scrubber should catch before the payer does.
  • 94 codes are named in Medicare coverage policies. An LCD or NCD lists them as supporting medical necessity, or explicitly as not supporting it. Which applies depends on the MAC for your state.

Categories in Z40-Z53

ICD-10-CMFY2026-Apr· effective April 1, 2026