DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

Z51 Encounter for other aftercare and medical care

  • Header · not billable

Z51 is not billable. The category heads 8 billable codes in FY2027, grouped under 6 subdivisions.

Index → code

Where it sits

  1. Chapter 21 Factors influencing health status and contact with health services (Z00-Z99)
  2. Z40-Z53 Encounters for other specific health care (Z40-Z53)
  3. Z51 Encounter for other aftercare and medical care
Billable codes
8
Subdivisions
6
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
26

Codes in Z51

  1. Z51.0
    Encounter for antineoplastic radiation therapy
    BillableExempt
  2. Z51.1
    Encounter for antineoplastic chemotherapy and immunotherapy
    Header
    Excludes2 1

    Excludes2

    • encounter for chemotherapy and immunotherapy for nonneoplastic condition - code to condition
  3. Z51.11
    Encounter for antineoplastic chemotherapy
    BillableExempt
  4. Z51.12
    Encounter for antineoplastic immunotherapy
    BillableExempt
  5. Z51.5
    Encounter for palliative care
    BillableExempt
    Inclusion terms 2

    Inclusion terms

    • Encounter for comfort care
    • Encounter for hospice care
  6. Z51.6
    Encounter for desensitization to allergens
    BillableExempt
  7. Z51.8
    Encounter for other specified aftercare
    Header
    Excludes1 1

    Excludes1

    • holiday relief care (Z75.5) Z75.5
  8. Z51.81
    Encounter for therapeutic drug level monitoring
    BillableExempt
    Excludes1 1, Code also 1

    Excludes1

    • encounter for blood-drug test for administrative or medicolegal reasons (Z02.83) Z02.83

    Code also

    • any long-term (current) drug therapy (Z79.-) Z79
  9. Z51.89
    Encounter for other specified aftercare
    BillableExempt
  10. Z51.A
    Encounter for sepsis aftercare
    BillableExempt

Sources of each column.

Instructions

At Z51

Excludes1

  • follow-up examination after treatment (Z08-Z09) Z08 Z09

Code also

  • condition requiring care

Notes that also apply

Block Z40-Z53 instructions (Inclusion terms 1, Excludes2 1): printed on the block page.

Chapter 21 instructions (Notes 3): printed on the chapter 21 page.

Index entries

  • Radiotherapy session → Z51.0
  • Palliative care → Z51.5
  • Aftercare → Z51.89
  • Admission (for)radiation therapy (antineoplastic) → Z51.0
  • Encounter (with health service) (for)radiation therapy (antineoplastic) → Z51.0
  • Maintenance (encounter for)antineoplastic radiation therapy → Z51.0
  • Radiationtherapy, encounter for → Z51.0
  • Chemotherapy (session) (for)cancer → Z51.11
  • Chemotherapy (session) (for)neoplasm → Z51.11
  • Encounter (with health service) (for)chemotherapy for neoplasm → Z51.11
  • Maintenance (encounter for)antineoplastic chemotherapy → Z51.11
  • Encounter (with health service) (for)immunotherapy for neoplasm → Z51.12
  • Immunotherapy (encounter for)antineoplastic → Z51.12
  • Care (of) (for) (following)comfort → Z51.5
  • Care (of) (for) (following)hospice → Z51.5
  • Care (of) (for) (following)palliative → Z51.5
  • Encounter (with health service) (for)comfort → Z51.5
  • Encounter (with health service) (for)hospice → Z51.5
  • Encounter (with health service) (for)palliative care → Z51.5
  • Admission (for)desensitization to allergens → Z51.6
  • Encounter (with health service) (for)desensitization to allergens → Z51.6
  • Encounter (with health service) (for)therapeutic drug level monitoring → Z51.81
  • Monitoring (encounter for)therapeutic drug level → Z51.81
  • Admission (for)aftercare → Z51.89
  • Admission (for)aftercareradiation therapy (antineoplastic) → Z51.0
  • Admission (for)aftercaresepsis → Z51.A

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy