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Z86.17 ICD-10-CM Code: Personal history of Clostridioides difficile infection

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Code Set: New for FY2027 — not valid before October 1, 2026.

Official Registry Overview & Definition

No additional overview provided for this record.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for Z86.17 in the official ICD-10-CM tabular list.

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Personal history of Clostridium difficile colitis (fulminant) (nonfulminant)
  • Personal history of foodborne intoxication by Clostridium difficile
  • Personal history of Pseudomembraneous colitis

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Code First

Underlying conditions that must be sequenced before this code.

  • any follow-up examination after treatment (Z09)

Code Also

Additional codes that may be required to fully describe the encounter.

  • any follow-up examination (Z08-Z09)

Indexed Clinical Terms (5)

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.

  • History, personal (of), Clostridium difficile, colitis (fulminant) (nonfulminant)
  • History, personal (of), Clostridium difficile, difficile infection
  • History, personal (of), Clostridium difficile, foodborne intoxication
  • History, personal (of), infection NEC, Clostridioides (Clostridium) difficile (colitis) (infection)
  • History, personal (of), malignant neoplasm (of), Pseudomembraneous colitis

Frequently Compared Codes

The official Excludes notes on Z86.17 name these codes. Each comparison page covers when the two can — or must not — be reported together.

Change history

  • FY2027 — 2026-10-01
    Added to the code set
    Personal history of Clostridioides difficile infection
    FY2027 changes

Verify Before Coding

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Relationships & Classification

Official ICD-10-CM tabular notes on other codes that name Z86.17 or its code family.

1 Excludes2 notes: Z20 (via Z86.1.-).

1 Use Additional Code instructions: Z09 (via Z86.-).

Contextual Map

Every relationship of Z86.17 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • Z00-Z99 — Chapter 21: Factors Influencing Health Status and Contact with Health Services (Z00-Z99) (Z00-Z99) [Hierarchy]
  • Z77-Z99 — Persons with potential health hazards related to family and personal history and certain conditions influencing health status [Hierarchy]

Excludes1

  • A04.71 — Enterocolitis due to Clostridium difficile, recurrent [Excludes1]: “enterocolitis due to Clostridium difficile, recurrent (A04.71)” · check together

Referenced by Excludes2 notes

  • Z20 — Contact with and (suspected) exposure to communicable diseases [Excludes2](via Z86.1.-): “personal history of infectious and parasitic diseases (Z86.1-)” · check together

Referenced by Use Additional Code instructions

  • Z09 — Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm [Use Additional Code](via Z86.-): “code to identify any applicable history of disease code (Z86.-, Z87.-)” · check together

Index entries

  • History, personal (of), Clostridium difficile, colitis (fulminant) (nonfulminant)[Index term]
  • History, personal (of), Clostridium difficile, difficile infection[Index term]
  • History, personal (of), Clostridium difficile, foodborne intoxication[Index term]
  • History, personal (of), infection NEC, Clostridioides (Clostridium) difficile (colitis) (infection)[Index term]
  • History, personal (of), malignant neoplasm (of), Pseudomembraneous colitis[Index term]

Nearest codes (40)

  • Z86 — Personal history of certain other diseases [Sibling]
  • Z86.007 — Personal history of in-situ neoplasm of skin [Sibling]
  • Z86.008 — Personal history of in-situ neoplasm of other site [Sibling]
  • Z86.00A — Personal history of in-situ neoplasm of the fallopian tube(s) [Sibling]
  • Z86.01 — Personal history of benign neoplasm [Sibling]
  • Z86.010 — Personal history of colon polyps [Sibling]
  • Z86.0100 — Personal history of colon polyps, unspecified [Sibling]
  • Z86.0101 — Personal history of adenomatous and serrated colon polyps [Sibling]
  • and 32 more

Change history

  • FY2027 — Added to the code set [Change history]

Nearest Codes in This Family

Official ICD-10-CM classifications closest to Z86.17 in its code family, with their registry titles.

  • Z86.12 — Personal history of poliomyelitis
  • Z86.13 — Personal history of malaria
  • Z86.14 — Personal history of Methicillin resistant Staphylococcus aureus infection
  • Z86.15 — Personal history of latent tuberculosis infection
  • Z86.16 — Personal history of COVID-19
  • Z86.19 — Personal history of other infectious and parasitic diseases
  • Z86.2 — Personal history of diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
  • Z86.3 — Personal history of endocrine, nutritional and metabolic diseases
  • Z86.31 — Personal history of diabetic foot ulcer
  • Z86.32 — Personal history of gestational diabetes

View all codes in the Z86 family