2025 ICD-10-CM code T50.A15D

Adverse effect of pertussis vaccine, including combinations with a pertussis component, subsequent encounter.

Use a secondary code from Chapter 20 (External causes of morbidity) to specify the cause of the injury, if applicable.

Medical necessity is established by the presence of an adverse reaction causally related to the administration of a pertussis-containing vaccine.

The provider is responsible for documenting the specific adverse effect experienced by the patient,the relationship to the pertussis vaccine, and the treatment provided.

In simple words: This code represents a follow-up visit for a negative reaction to a pertussis vaccine or a combination vaccine that includes pertussis.

Adverse effect of pertussis vaccine, including combinations with a pertussis component, subsequent encounter.

Example 1: A patient presents for a follow-up visit for localized swelling and redness at the injection site after receiving a DTaP vaccine one week prior.The reaction is deemed to be an adverse effect of the pertussis component., A patient who received a Tdap vaccine several weeks ago experiences persistent low-grade fever and fatigue.They return for a subsequent encounter to assess these symptoms, which are considered an adverse effect of the pertussis vaccine., A patient with a history of a previous mild allergic reaction to a pertussis-containing vaccine experiences hives and itching after receiving a booster shot.They are seen in the clinic for management of this adverse reaction.

Documentation should include the date of the vaccine administration, description of the adverse reaction, onset and duration of symptoms, treatment provided, and any related diagnostic testing.

** It is important to differentiate between an adverse effect and a true contraindication to future vaccination.Consult immunization guidelines for recommendations on future pertussis vaccination in individuals experiencing adverse reactions.

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