nature_code	nature_text	display_level	selectable	sort_sequence
000000	All natures	0	T	1
100XXX	Traumatic injuries or exposures--unspecified	3	T	5
101XXX	Numbness, tingling	3	T	6
102XXX	Soreness, swelling, inflammation	3	T	7
103XXX	Nonfatal 'crushing' injuries	3	T	8
109XXX	Other symptoms of unspecified traumatic injury or exposure--n.e.c.	3	T	9
10XXXX	Traumatic injuries or exposures-- nonspecific and unspecified	2	T	4
110XXX	Injuries to the brain, spinal cord--unspecified	3	T	11
1110XX	Intracranial injuries--unspecified	4	T	13
1111XX	Intracranial injuries with skull fractures	4	T	14
1112XX	Cerebral and other intracranial hemorrhages without skull fracture	4	T	15
1113XX	Concussions	4	T	16
1119XX	Other Intracranial injuries without skull fractures--n.e.c.	4	T	17
111XXX	Intracranial Injuries	3	T	12
1120XX	Spinal cord injuries, paralysis--unspecified	4	T	19
1121XX	Paralysis, paraplegia, quadriplegia	4	T	20
1129XX	Spinal cord injuries, paralysis--n.e.c.	4	T	21
112XXX	Spinal cord injuries, paralysis	3	T	18
118XXX	Multiple types of injuries to the brain, spinal cord	3	T	22
119XXX	Other injuries to the brain, spinal cord--n.e.c.	3	T	23
11XXXX	Injuries to the brain, spinal cord	2	T	10
120XXX	Severe wounds, internal injuries--unspecified	3	T	25
121XXX	Gunshot wounds	3	T	26
1220XX	Amputations, avulsions, enucleations--unspecified	4	T	28
1221XX	Amputations involving bone loss	4	T	29
1222XX	Avulsions, enucleations without bone loss	4	T	30
122XXX	Amputations, avulsions, enucleations	3	T	27
1230XX	Injuries to internal organs, major blood vessels--unspecified	4	T	32
1231XX	Open wounds involving internal organs, major blood vessels	4	T	33
1232XX	Closed trauma involving internal organs, major blood vessels	4	T	34
1239XX	Injuries to internal organs, major blood vessels--n.e.c.	4	T	36
123XXX	Injuries to internal organs and major blood vessels	3	T	31
124XXX	Fractures	3	T	37
128XXX	Multiple severe wounds and internal injuries	3	T	38
129XXX	Severe wounds, internal injuries--n.e.c.	3	T	39
12XXXX	Severe wounds, internal injuries	2	T	24
130XXX	Surface and flesh wounds--unspecified	3	T	41
1311XX	Eye abrasion(s), irritation--except chemical or allergic	4	T	43
1312XX	Retinal tear	4	T	44
131XXX	Injuries specific to eyes	3	T	42
132XXX	Cuts, lacerations, punctures without injury to internal structures	3	T	45
133XXX	Abrasions	3	T	46
134XXX	Bruises, contusions	3	T	47
135XXX	Blisters	3	T	48
136XXX	Ruptured eardrum	3	T	49
137XXX	Dental injuries	3	T	50
138XXX	Multiple surface and flesh wounds	3	T	51
139XXX	Surface and flesh wounds--n.e.c.	3	T	52
13XXXX	Surface and flesh wounds	2	T	40
140XXX	Soft tissue injuries--unspecified	3	T	54
141XXX	Dislocations	3	T	55
142XXX	Hernias	3	T	56
1430XX	Cartilage fractures and tears--unspecified	4	T	58
1431XX	Meniscus tear	4	T	59
1439XX	Other cartilage fractures and tears--n.e.c.	4	T	60
143XXX	Cartilage fractures and tears	3	T	57
1440XX	Sprains, strains, tears--unspecified	4	T	62
1441XX	Major tears�to muscles, tendons, ligaments	4	T	63
1442XX	Sprains, strains, minor tears	4	T	64
1448XX	Multiple major and minor sprains, strains, tears	4	T	65
144XXX	Sprains, strains, tears	3	T	61
145XXX	Whiplash	3	T	66
146XXX	Pinched nerve	3	T	67
148XXX	Multiple soft tissue injuries	3	T	68
149XXX	Soft tissue injuries--n.e.c.	3	T	69
14XXXX	Soft tissue injuries	2	T	53
150XXX	Burns, corrosions, electrical injuries--unspecified	3	T	71
1510XX	Chemical burns, corrosions--degree unspecified	4	T	73
1511XX	Chemical burns, corrosions--first degree	4	T	74
1512XX	Chemical burns, corrosions--second degree	4	T	75
1513XX	Chemical burns, corrosions--third degree or higher	4	T	76
151XXX	Chemical burns, corrosions	3	T	72
1520XX	Thermal burns--degree unspecified	4	T	78
1521XX	Thermal burns--first degree	4	T	79
1522XX	Thermal burns--second degree	4	T	80
1523XX	Thermal burns--third degree or higher	4	T	81
152XXX	Thermal burns	3	T	77
1530XX	Effects of electric current--unspecified	4	T	83
1531XX	Electrical burns--any degree	4	T	84
1532XX	Electrocution, electric shock	4	T	85
153XXX	Effects of electric current	3	T	82
1590XX	Other or multiple types of burns--degree unspecified	4	T	88
1591XX	Other or multiple types of burns--first degree	4	T	89
159XXX	Other or multiple types of burns	3	T	87
15XXXX	Burns, corrosions, electrical injuries	2	T	70
160XXX	Effects of poison, toxic, or allergenic exposure--unspecified	3	T	93
161XXX	Poisoning, poisoning-related asphyxia	3	T	94
162XXX	Anaphylactic shock, anaphylaxis	3	T	95
163XXX	Poison, toxic, or allergenic effects--other respiratory	3	T	96
164XXX	Poison, toxic, or allergenic effects--dizziness, headache	3	T	97
165XXX	Poison, toxic, or allergenic effects--nausea, vomiting	3	T	98
166XXX	Urticaria, hives--acute	3	T	99
167XXX	Allergic and irritant dermatitis--acute	3	T	100
168XXX	Multiple effects of poison, toxic, or allergenic exposure	3	T	101
169XXX	Effects of poison, toxic, or allergenic exposure--n.e.c.	3	T	102
16XXXX	Effects of poison, toxic, or allergenic exposure	2	T	92
170XXX	Effects of environmental conditions and exposures--unspecified	3	T	104
1710XX	Effects of reduced temperature--unspecified	4	T	106
1711XX	Frostbite	4	T	107
1719XX	Effects of reduced temperature--n.e.c.	4	T	110
171XXX	Effects of reduced temperature	3	T	105
1720XX	Effects of heat--unspecified	4	T	112
1721XX	Heat stroke, syncope	4	T	113
1722XX	Heat exhaustion, fatigue	4	T	114
1729XX	Effects of heat--n.e.c.	4	T	115
172XXX	Effects of heat and light	3	T	111
1730XX	Effects of air or water pressure--unspecified	4	T	117
1731XX	Aero-otitis media	4	T	118
1739XX	Effects of air or water pressure--n.e.c.	4	T	122
173XXX	Effects of air or water pressure	3	T	116
175XXX	Asphyxiation--except toxic or allergenic	3	T	124
179XXX	Other effects of environmental conditions and exposures--n.e.c.	3	T	126
17XXXX	Effects of environmental conditions and exposures	2	T	103
180XXX	Multiple traumatic injuries and disorders--unspecified	3	T	128
1811XX	Injuries to the brain, spinal cord and severe wounds, internal injuries	4	T	130
1812XX	Injuries to the brain, spinal cord and soft tissue injuries	4	T	131
181XXX	Injuries to the brain, spinal cord and other injuries	3	T	129
1821XX	Severe wounds or internal injuries and soft tissue injuries	4	T	136
1822XX	Severe wounds, internal injuries and burns	4	T	137
1823XX	Fractures and surface, flesh wounds	4	T	138
1824XX	Fractures and soft tissue injuries	4	T	139
1825XX	Fractures and burns	4	T	140
182XXX	Severe wounds or internal injuries and other injuries	3	T	135
1831XX	Surface, flesh wounds and soft tissue injuries	4	T	144
1832XX	Surface, flesh wounds and toxic, allergenic effects	4	T	145
1833XX	Surface, flesh wounds and burns, electrical injuries	4	T	146
183XXX	Surface and flesh wounds and other injuries	3	T	143
1841XX	Soft tissue injuries and burns	4	T	148
184XXX	Soft tissue injuries and other injuries	3	T	147
185XXX	Burns and toxic effects (including smoke inhalation)	3	T	151
189XXX	Other multiple traumatic injuries--n.e.c.	3	T	152
18XXXX	Multiple traumatic injuries and disorders	2	T	127
191XXX	Traumatic shock	3	T	154
199XXX	Other traumatic injuries--n.e.c.	3	T	155
19XXXX	Traumatic injuries--n.e.c.	2	T	153
1XXXXX	Traumatic injuries and disorders	1	T	3
20XXXX	Systemic diseases and disorders--unspecified	2	T	157
220XXX	Nervous system and sense organs diseases--unspecified	3	T	160
2231XX	Seizures, seizure disorder	4	T	165
2232XX	Migraine	4	T	166
223XXX	Other disorders of the central nervous system	3	T	163
2250XX	Disorders of the eye, adnexa, vision--unspecified	4	T	174
2251XX	Inflammation except conjunctivitis--including ophthalmia, iritis, chalazion	4	T	175
2253XX	Blindness, low vision, except traumatic	4	T	177
2259XX	Disorders of the eye, adnexa, vision--n.e.c.	4	T	180
225XXX	Disorders of the eye, adnexa, vision	3	T	173
2260XX	Disorders of the ear, mastoid process, hearing--unspecified	4	T	182
2261XX	Deafness, hearing loss and impairment	4	T	183
2262XX	Tinnitus	4	T	184
226XXX	Disorders of the ear, mastoid process, hearing	3	T	181
22XXXX	Nervous system and sense organs diseases	2	T	159
230XXX	Circulatory system diseases--unspecified	3	T	188
232XXX	Hypertensive disease	3	T	190
2330XX	Ischemic heart disease--unspecified	4	T	192
2331XX	Myocardial infarction, heart attack	4	T	193
2332XX	Angina	4	T	194
233XXX	Ischemic heart disease, including heart attack	3	T	191
2350XX	Other forms of heart disease--unspecified	4	T	202
2359XX	Other forms of heart disease--n.e.c.	4	T	206
235XXX	Other forms of heart disease	3	T	201
2361XX	Stroke	4	T	209
236XXX	Cerebrovascular disease	3	T	207
2382XX	Hemorrhoids	4	T	219
238XXX	Diseases of the veins, lymphatics	3	T	216
23XXXX	Circulatory system diseases	2	T	187
240XXX	Respiratory system diseases--unspecified	3	T	224
2411XX	Pneumonia	4	T	227
2412XX	Bronchitis, bronchiolitis	4	T	228
241XXX	Acute respiratory infections, secondary to infectious diseases	3	T	225
2433XX	Asthma, except intrinsic	4	T	235
243XXX	Chronic obstructive pulmonary disease and allied conditions	3	T	231
2499XX	Other respiratory system diseases--n.e.c.	4	T	254
249XXX	Other respiratory system diseases	3	T	249
24XXXX	Respiratory system diseases	2	T	223
250XXX	Digestive system diseases and disorders--unspecified	3	T	256
259XXX	Digestive system diseases and disorders--n.e.c.	3	T	262
25XXXX	Digestive system diseases and disorders	2	T	255
262XXX	Other diseases of urinary system	3	T	270
2632XX	Spontaneous abortion, miscarriage	4	T	274
2633XX	Other complications of pregnancy	4	T	275
263XXX	Diseases and disorders of the reproductive tract	3	T	271
26XXXX	Genitourinary system diseases and disorders	2	T	263
270XXX	Musculoskeletal and connective tissue diseases and disorders--unspecified	3	T	280
271XXX	Arthropathies and related disorders (arthritis)	3	T	281
2720XX	Radiculopathy and disc disorders--unspecified	4	T	283
2721XX	Cervical Radiculopathy	4	T	284
2722XX	Sciatica	4	T	285
2723XX	Disc disorders, herniated disc	4	T	286
2729XX	Radiculopathy and disc disorders--n.e.c.	4	T	287
272XXX	Radiculopathy and disc disorders	3	T	282
2730XX	Other Dorsopathies--unspecified	4	T	289
2732XX	Lumbago	4	T	291
2733XX	Curvature of spine	4	T	292
2739XX	Other dorsopathies--n.e.c.	4	T	293
273XXX	Other Dorsopathies	3	T	288
2740XX	Other nerve impingement or entrapment--unspecified	4	T	295
2741XX	Carpal tunnel (CTS)	4	T	296
2749XX	Other nerve impingement or entrapment--n.e.c.	4	T	298
274XXX	Other nerve impingement or entrapment--except the back	3	T	294
2750XX	Soft and connective tissue disorder--unspecified	4	T	300
2751XX	Bursitis	4	T	301
2752XX	Stenosing tenosynovitis	4	T	302
2753XX	Other tenosynovitis, synovitis	4	T	303
2754XX	Epicondylitis	4	T	304
2755XX	Other or unspecified tendonitis	4	T	305
2756XX	Ganglion or cystic tumor	4	T	306
2758XX	Multiple soft tissue disorders	4	T	308
2759XX	Soft and connective tissue disorder--n.e.c.	4	T	309
275XXX	Soft and connective tissue disorders--except the back	3	T	299
276XXX	Osteopathies, chondropathies, acquired deformities	3	T	310
279XXX	Musculoskeletal and connective tissue diseases and disorders--n.e.c.	3	T	311
27XXXX	Musculoskeletal and connective tissue diseases and disorders	2	T	279
280XXX	Disorders of the skin and subcutaneous tissue--unspecified	3	T	313
2810XX	Infections of the skin and subcutaneous tissue--unspecified	4	T	315
2811XX	Cellulitis, abscess	4	T	316
2813XX	Methicillin-resistant staphylococcus aureus (MRSA) infection	4	T	318
2819XX	Infections of the skin and subcutaneous tissue--n.e.c.	4	T	321
281XXX	Infections of the skin and subcutaneous tissue	3	T	314
283XXX	Diseases of sebaceous glands	3	T	323
289XXX	Other diseases and disorders of the skin and subcutaneous tissue	3	T	328
28XXXX	Disorders of the skin and subcutaneous tissue	2	T	312
291XXX	Endocrine, nutritional, metabolic, and immunity disorders	3	T	337
29XXXX	Other systemic diseases and disorders	2	T	336
2XXXXX	Diseases and disorders of body systems	1	T	156
30XXXX	Infectious and parasitic diseases--unspecified	2	T	346
3100XX	Unspecified clinical effects of bacterial diseases	4	T	349
310XXX	Bacterial diseases--unspecified	3	T	348
311XXX	Tuberculosis	3	T	353
3192XX	Diphtheria, whooping cough	4	T	367
319XXX	Other bacterial diseases--n.e.c.	3	T	365
31XXXX	Bacterial diseases	2	T	347
320XXX	Viral diseases--unspecified	3	T	375
321XXX	Human immunodeficiency virus (HIV) with or without Acquired immune deficiency syndrome (AIDS)	3	T	376
3225XX	Meningitis due to enterovirus	4	T	383
322XXX	Viral diseases affecting the central nervous system	3	T	377
3232XX	Chicken pox, shingles	4	T	388
323XXX	Viral diseases accompanied by exanthem (eruptive fever)	3	T	385
326XXX	Viral diseases of the conjunctiva	3	T	408
3270XX	Respiratory viral diseases--unspecified	4	T	410
3271XX	Influenza--common	4	T	411
3274XX	Coronavirus--novel	4	T	414
3275XX	Post COVID-19 condition	4	T	415
3279XX	Respiratory viral diseases--n.e.c.	4	T	417
327XXX	Respiratory viral diseases	3	T	409
3299XX	Other diseases due to viruses--n.e.c.	4	T	422
329XXX	Other diseases due to viruses	3	T	418
32XXXX	Viral diseases	2	T	374
333XXX	Lyme disease	3	T	431
33XXXX	Other non-viral arthropod-borne diseases	2	T	423
341XXX	Dermatophytosis, athlete's foot, tinea	3	T	435
34XXXX	Mycoses, fungal infections	2	T	433
360XXX	Infectious diseases peculiar to the intestines--unspecified	3	T	440
363XXX	Other salmonella infections	3	T	443
364XXX	Other bacterial food poisoning	3	T	444
365XXX	Clostridium difficilis (C. diff.)	3	T	445
369XXX	Infectious diseases peculiar to the intestines--n.e.c.	3	T	448
36XXXX	Infectious diseases peculiar to the intestines	2	T	439
392XXX	Scabies and other acariases	3	T	452
399XXX	Other infectious and parasitic diseases--n.e.c.	3	T	455
39XXXX	Other infectious and parasitic diseases	2	T	449
3XXXXX	Infectious and parasitic diseases	1	T	345
410XXX	Malignant neoplasms and tumors (cancers, carcinomas, sarcomas)--unspecified	3	T	458
41XXXX	Malignant neoplasms and tumors (cancers, carcinomas, sarcomas)	2	T	457
4XXXXX	Neoplasms, tumors, and cancers	1	T	456
50XXXX	Symptoms, signs, and ill-defined conditions--unspecified	2	T	501
510XXX	Symptoms--unspecified	3	T	503
5110XX	General symptoms--unspecified	4	T	505
5111XX	Loss of consciousness--not heat related	4	T	506
5112XX	Convulsions, seizures	4	T	507
5113XX	Malaise and fatigue	4	T	508
5114XX	Dizziness--general	4	T	509
5115XX	Inflammation, swelling--general	4	T	510
5116XX	Numbness--general	4	T	511
5118XX	Multiple general symptoms	4	T	512
5119XX	General symptoms--n.e.c.	4	T	513
511XXX	General symptoms	3	T	504
5121XX	Spasms or tremors--n.e.c.	4	T	516
5122XX	Earache	4	T	517
512XXX	Symptoms involving nervous and musculoskeletal systems	3	T	514
5139XX	Symptoms involving skin and other integumentary tissue--n.e.c.	4	T	527
513XXX	Symptoms involving skin and other integumentary tissue	3	T	521
5141XX	Headache, except migraine	4	T	530
5142XX	Loss of voice, voice disturbances	4	T	531
5148XX	Multiple symptoms involving head and neck	4	T	532
5149XX	Symptoms involving head and neck--n.e.c.	4	T	533
514XXX	Symptoms involving head and neck	3	T	528
5150XX	Symptoms involving cardiovascular system--unspecified	4	T	535
5151XX	Unspecified tachycardia (rapid heartbeat)	4	T	536
5158XX	Multiple symptoms involving cardiovascular system	4	T	539
5159XX	Symptoms involving cardiovascular system--n.e.c.	4	T	540
515XXX	Symptoms involving cardiovascular system	3	T	534
5160XX	Symptoms involving respiratory system and chest--unspecified	4	T	542
5164XX	Chest pain	4	T	546
5168XX	Multiple symptoms involving respiratory system and chest	4	T	547
5169XX	Symptoms involving respiratory system and chest--n.e.c.	4	T	548
516XXX	Symptoms involving respiratory system and chest	3	T	541
5171XX	Nausea and vomiting--general	4	T	551
517XXX	Symptoms involving digestive and urinary system	3	T	549
518XXX	Multiple symptoms	3	T	558
51XXXX	Symptoms	2	T	502
529XXX	Other abnormal findings	3	T	572
52XXXX	Abnormal findings	2	T	560
58XXXX	Multiple symptoms, signs, and ill-defined conditions	2	T	573
59XXXX	Symptoms, signs, and ill-defined conditions--n.e.c.	2	T	574
5XXXXX	Symptoms, signs, and ill-defined conditions	1	T	500
6113XX	Damage to other devices	4	T	583
611XXX	Damage to prosthetic devices and aids	3	T	579
6122XX	Damage to pins, rods, plates, and screws	4	T	589
612XXX	Damage to orthopedic devices	3	T	586
61XXXX	Damage to prosthetic and orthopedic devices	2	T	577
620XXX	Mental disorders and syndromes--unspecified	3	T	594
6210XX	Anxiety, stress--unspecified	4	T	596
6211XX	Post-traumatic stress disorder	4	T	597
6212XX	Anxiety or panic--multiple episodes	4	T	598
6213XX	Anxiety or panic attack--single episode	4	T	599
621XXX	Anxiety, stress	3	T	595
62XXXX	Mental disorders and syndromes	2	T	593
69XXXX	Other diseases, conditions, and disorders--n.e.c.	2	T	602
6XXXXX	Other diseases, conditions, and disorders	1	T	575
7XXXXX	Exposures to harmful substance or environment--no injury or illness incurred	1	T	603
81XXXX	Traumatic injuries and mental disorders	2	T	605
83XXXX	Traumatic injuries and infectious disease	2	T	612
8XXXXX	Multiple diseases, conditions, and disorders	1	T	604
990XXX	Nature--unspecified	3	T	613