ATC states for "The Anatomical, Therapeutic, Chemical Classification System".

Notice that this CODES are available in languages:

Example of values:

Property	Value	Comments
#CODE:ID_STANDARD_CODE	"DIAGNOSIS.ATC"	Constant value to identify MDC codes
#CODE:ID_CODE	It will correspond to the internal MDC code to identify a program category (e.g. "N").
#CODE:ID_LANGUAGE	"ES"\|"CA"\|"EN"\|"ZH"	Available languages.
#CODE:CODE_DESCRIPTION	Description (e.g. "Nervous System")	Text that describes the MDC code identified with the #CODE:ID_CODE

FIRST LEVEL

#CODE.ID	#CODE.DESCRIPTION*
A	Alimentary tract and metabolism
B	Blood and blood forming organs
C	Cardiovascular system
D	Dermatologicals
G	Genito-urinary system and sex hormones
H	Systemic hormonal preparations, excluding sex hormones and insulins
J	Antiinfectives for systemic use
L	Antineoplastic and immunomodulating agents
M	Musculo-skeletal system
N	Nervous system
P	Antiparasitic products, insecticides and repellents
R	Respiratory system
S	Sensory organs
V	Various

* Only English CODE_DESCRIPTION is listed. This field is also available in CA and ES.

Second level

The second level of the code indicates the therapeutic main group and consists of two digits.

The third level of the code indicates the therapeutic/pharmacological subgroup and consists of one letter.

Example: C03C High-ceiling diuretics

The fourth level of the code indicates the chemical/therapeutic/pharmacological subgroup and consists of one letter.

Example: C03CA Sulfonamides

The fifth level of the code indicates the chemical substance and consists of two digits.

Example: C03CA01 Furosemide