diagnosis table

The diagnosis table

The diagnosis table provides billed diagnoses for patients. Diagnoses are determined after discharge from the emergency department.

Table source: Emergency department information system.

Table purpose: Track patient admissions to the emergency department.

Number of rows: 899,050

Links to:

• edstays on stay_id

Table columns

Name	Postgres data type
subject_id	INTEGER NOT NULL
stay_id	INTEGER NOT NULL
seq_num	INTEGER NOT NULL
icd_code	VARCHAR(10) NOT NULL
icd_version	INTEGER NOT NULL
icd_title	TEXT NOT NULL

subject_id

subject_id is a unique identifier which specifies an individual patient. Any rows associated with a single subject_id pertain to the same individual.

stay_id

An identifier which uniquely identifies a single emergency department stay for a single patient.

seq_num

A pseudo-priority for the diagnosis. A seq_num of 1 usually indicates a “primary” diagnosis, but accurately assessing the priority for patients with multiple diagnoses is challenging.

icd_code

A coded diagnosis using the International Classification of Diseases (ICD) ontology.

icd_version

The version of the ICD system used; either 9 indicating ICD-9 or 10 indicating ICD-10. The ontologies for these two systems differ, and therefore the meaning of the icd_code will depend on the icd_version.

icd_title

The textual description of the diagnosis.