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ICD-10-CM 2027 diagnosis code

Z86.00Personal history of in-situ neoplasm

Not billable — use a more specific code

Z86.00 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Z86.00

Z86.00 is the ICD-10-CM diagnosis code for personal history of in-situ neoplasm. It belongs to category Z86 (personal history of certain other diseases), block Z77-Z99 (persons with potential health hazards related to family and personal history and certain conditions influencing health status) and chapter 21 (factors influencing health status and contact with health services). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.

Within Z86.0 (personal history of in-situ and benign neoplasms and neoplasms of uncertain behavior), Z86.00 is specifically for personal history of in-situ neoplasm. Related codes cover benign neoplasm (Z86.01) and neoplasm of uncertain behavior (Z86.03).

To report this condition, pick the subcode that matches the documentation: Z86.000 (of breast), Z86.001 (of cervix uteri), Z86.002 (of other and unspecified genital organs), Z86.003 (of oral cavity, esophagus and stomach), Z86.004 (of other and unspecified digestive organs), Z86.005 (of middle ear and respiratory system), Z86.006 (in-situ), Z86.007 (of skin) and 2 more.

Code first: any follow-up examination after treatment (Z09).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under Z86.00

Coding notes

Applicable toConditions and synonyms classified to this code
  • Conditions classifiable to D00-D09

Notes that apply from higher levels

Instructions written at a parent level also apply to Z86.00.

Codes whose notes reference Z86.00

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Z86.00

Is Z86.00 billable?

No. Z86.00 is a header code. Report one of its more specific subcodes instead.