Z86.1

Personal history of infectious and parasitic diseases

FY2027Chapter 21: Factors influencing health status and contact with health services/Z77–Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

Code first
Code also
Excludes1

Z86.1 is a non-billable ICD-10-CM code header for personal history of infectious and parasitic diseases. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are Z86.11 Personal history of tuberculosis, Z86.12 Personal history of poliomyelitis, Z86.13 Personal history of malaria, Z86.14 Personal history of Methicillin resistant Staphylococcus aureus infection and 4 more. Its coding notes include a Code first instruction, a Code also instruction and 2 Excludes1 entries.

Guidelines tip

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

History codes can go on any record. The reason for the encounter is sequenced first, with history codes as additional diagnoses.

Guidelines I.C.21.c.4Personal and family history Z codesRead the official text

Code first

If the underlying condition listed here is present and known, sequence it first.

Inherited from Z86 Personal history of certain other diseases

any follow-up examination after treatment (Z09)

Code also

Two codes may be needed to describe the condition. This note gives no sequencing order.

Also from chapter/block level (1 note)

Inherited from Z77–Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status

any follow-up examination (Z08-Z09)

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code

personal history of infectious diseases specific to a body system
sequelae of infectious and parasitic diseases (B90-B94)

Inclusion terms

Conditions classified to this code.

This code

Conditions classifiable to A00-B89, B99

Notes

Also from chapter/block level (3 notes)

Inherited from Chapter 21 Factors influencing health status and contact with health services

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.

More specific codes under Z86.1 8