ICD – 10 Guidelines Chaper-1 Selection and sequencing of HIV code

ICD – 10 Guidelines Chaper-1 Selection and sequencing of HIV code:

2)  Selection and sequencing of HIV code

c) Whether the patient is newly diagnosed:

Whether the patient is newly diagnosed or has had previous admissions/encounters for HIV conditions is irrelevant to the sequencing decision.

d) Asymptomatic human immunodeficiency virus:

->   Z21 Asymptomatic human immunodeficiency virus [HIV] infection status, is to be applied when the patient without any documentation of symptoms is listed as being “HIV positive”. “known HIV”, “HIV test positive”, or similar terminology.

->  Do not use this code if the term “AIDS” is used or if the patient is treated for any HIV-related illness or is described as having any condition(s) resulting from his/her HIV positive status; use B20 in these cases.



Patient is coming to hospital with stomach pain who is HIV positive.

How to code?

Principle diagnosis:  Stomach pain

Additional diagnosis: Z21

e) Patients with inconclusive HIV serology:

Patients with inconclusive HIV serology, but no definitive diagnosis or manifestations of the illness,may be assigned code R75,  Inconclusive laboratory evidence of HIV.



Patient  is pregnant came to hospital for HIV test and the result is inconclusive.

How to code?



f) Previously diagnosed HIV – related illness:

Patients with any known prior diagnosis of an HIV-related illness should be coded to B20. Once a patient has developed an HIV – related illness, the patient should always be assigned code on every subsequent admission/encounter. Patients previously diagnosed with any HIV illness (B20) should never be assigned to R75 or Z21, Asymptomatic human immunodeficiency virus [HIV] infection status.


Patient coming with Tuberculosis and previously he diagnosed with HIV.

How to code?

Pdx: B20    Pdx- principle diagnosis

Sdx:  TB      Sdx- secondary diagnosis.


g) HIV Infection in Pregnancy, Childbirth and the Puerperium:

During pregnancy, childbirth or the puerperium, a patient admitted because of an HIV – related illness should receive a principle diagnosis code of O98.7-, Human immunodeficiency [HIV] disease complicating pregnancy, childbirth and the puerperium, followed by B20 and the code(s) for the HIV – related illness(es). Codes from Chapter 15 always take sequencing priority.

Patients with asymptomatic HIV infection status admitted ( or presenting for health care encounter ) during pregnancy, childbirth, or the puerperium should receive codes of pdx O98.7- and Z21.


Patient is pregnant coming with Cytomegalovirus and she is having HIV disease.

How to code?

Pdx:   O98.7

Sdx:   B20

Sdx:   Cytomegalovirus

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