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Table 1 Algorithm to define presumptive events by International Classification of Diseases 9 th Revision Clinical Modification (ICD9-CM) codes associated with medical encounters within six days following vaccination.

From: Frequency of medically attended adverse events following tetanus and diphtheria toxoid vaccine in adolescents and young adults: a Vaccine Safety Datalink study

ICD9-CM code(s)

Description

Presumptive events defined by a diagnosis code assigned on the day of vaccination (day 0) through day 6 or by a diagnosis code assigned on day 1 through day 6

682.3, 682.8, 682.9

Cellulitis

Day 1 through day 6

729.81

Limb swelling

Day 1 through day 6

729.5

Pain in limb

Day 1 through day 6

995.3

Allergy unspecified

Day 1 through day 6

708.x

Urticaria

Day 1 through day 6

289.3, 683, 785.6

Lymphadenitis

Day 1 through day 6

999.3

Infection following infusion or vaccination

Day 0 through day 6

995.0, 999.4

Anaphylaxis

Day 0 through day 6

999.5

Serum reaction

Day 0 through day 6

999.9

Complication of medical care

Day 0 through day 6

995.2

Adverse effect of a drug or biological substance

Day 0 through day 6