ICD-9 Code 558.9
Other and unspecified noninfectious gastroenteritis and colitis
Not Valid for Submission
558.9 is a legacy non-billable code used to specify a medical diagnosis of other and unspecified noninfectious gastroenteritis and colitis. This code was replaced on September 30, 2015 by its ICD-10 equivalent.
ICD-9: | 558.9 |
Short Description: | Noninf gastroenterit NEC |
Long Description: | Other and unspecified noninfectious gastroenteritis and colitis |
Convert 558.9 to ICD-10
The following crosswalk between ICD-9 to ICD-10 is based based on the General Equivalence Mappings (GEMS) information:
Code Classification
-
Diseases of the digestive system (520–579)
-
Noninfective enteritis and colitis (555-558)
- 558 Other noninfective gastroenteritis and colitis
-
Noninfective enteritis and colitis (555-558)
Information for Medical Professionals
Synonyms
- Acute and chronic colitis
- Acute gastroenteritis
- Acute hemorrhagic enterocolitis
- Acute radiation colitis
- Acute radiation enteritis
- Allergic ileitis
- Allergic jejunitis
- Antibiotic enterocolitis
- Behcet's colitis
- Chemical colitis
- Chronic colitis
- Chronic proliferative enteritis
- Colitis
- Colitis cystica
- Colitis cystica profunda
- Collagenous colitis
- Dietetic colitis
- Dietetic enteritis
- Dietetic enterocolitis
- Dietetic gastroenteritis
- Dietetic ileitis
- Dietetic jejunitis
- Dietetic sigmoiditis
- Distal colitis
- Diversion colitis
- Drug-induced colitis
- Drug-induced enteritis
- Eosinophilic gastroenteropathy with predominant muscle layer disease
- Exacerbation of non-infective colitis
- Fibrinous enteritis
- Gastroenteritis
- Gastrointestinal mucositis
- Granulomatous enteritis, non-Crohn's disease
- Hemorrhagic colitis
- Hemorrhagic enteritis
- Idiopathic colitis
- Ileitis
- Indeterminate colitis
- Inflammation of large intestine
- Inflammation of small intestine
- Inflammation of small intestine and colon
- Inflammatory bowel disease
- Inflammatory disorder of digestive tract
- Iritis with inflammatory bowel disease
- Jejunitis
- Juvenile arthritis of inflammatory bowel disease
- Lymphocytic-plasmacytic colitis
- Lymphocytic-plasmacytic enteritis
- Microscopic colitis
- Neutropaenic enterocolitis
- Neutropenic colitis
- Nonbacterial gastroenteritis of infant
- Noninfectious colitis
- Noninfectious enteritis
- Noninfectious gastroenteritis
- Noninfectious gastroenteritis associated with acquired immunodeficiency syndrome
- Noninfectious ileitis
- Noninfectious jejunitis
- Noninfectious sigmoiditis
- Non-infective enteritis and colitis
- Non-specific colitis
- Non-steroidal anti-inflammatory drug-induced colitis
- Phlegmonous colitis
- Phlegmonous enteritis
- Purulent enteritis
- Pyogranulomatous enteritis
- Sigmoiditis
- Soap colitis
- Stercoral colitis
- Suppurative colitis
- Uremic colitis
Index to Diseases and Injuries
References found for the code 558.9 in the Index of Diseases and Injuries:
- Colitis acute catarrhal croupous cystica superficialis exudative hemorrhagic noninfectious phlegmonous presumed noninfectious 558.9
- adaptive 564.9
- allergic 558.3
- amebic SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Amebiasis 006.9- nondysenteric 006.2
- anthrax 022.2
- bacillary SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Infection Shigella 004.9
- balantidial 007.0
- chronic 558.9
- ulcerative SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Colitis ulcerative 556.9
- ulcerative SEE ALSO See Also
- coccidial 007.2
- dietetic 558.9
- due to radiation 558.1
- eosinophilic 558.42
- functional 558.9
- gangrenous 009.0
- giardial 007.1
- granulomatous 555.1
- gravis SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Colitis ulcerative 556.9
- infectious SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis due to specific organism 009.0- presumed 009.1
- ischemic 557.9
- acute 557.0
- chronic 557.1
- due to mesenteric artery insufficiency 557.1
- membranous 564.9
- psychogenic 316 564.9
- mucous 564.9
- psychogenic 316 564.9
- polyposa SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Colitis ulcerative 556.9
- pseudomembranous 008.45
- pseudomucinous 564.9
- regional 555.1
- segmental 555.1
- septic SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis due to specific organism 009.0
- spastic 564.9
- psychogenic 316 564.9
- Staphylococcus 008.41
- food 005.0
- thromboulcerative 557.0
- toxic 558.2
- transmural 555.1
- trichomonal 007.3
- tuberculous ulcerative 014.8
- ulcerative chronic idiopathic nonspecific 556.9
- entero 556.0
- fulminant 557.0
- ileo 556.1
- left sided 556.5
- procto 556.2
- proctosigmoid 556.3
- psychogenic 316 556
- universal 556.6
- Enteritis acute catarrhal choleraic chronic congestive diarrheal exudative follicular hemorrhagic infantile lienteric noninfectious perforative phlegmonous presumed noninfectious pseudomembranous 558.9
- adaptive 564.9
- aertrycke infection 003.0
- allergic 558.3
- amebic SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Amebiasis 006.9- with abscess see Abscess amebic
- acute 006.0
- with abscess see Abscess amebic
- nondysenteric 006.2
- chronic 006.1
- with abscess see Abscess amebic
- nondysenteric 006.2
- nondysenteric 006.2
- anaerobic cocci gram negative gram positive mixed NEC NEC "Not elsewhere classifiable"
This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular. 008.46
- Bacteroides fragilis melaninogeniscus oralis 008.46
- Butyrivibrio fibriosolvens 008.46
- Campylobacter 008.43
- Candida 112.85
- Chilomastix 007.8
- choleriformis 001.1
- chronic 558.9
- ulcerative SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Colitis ulcerative 556.9
- ulcerative SEE ALSO See Also
- cicatrizing chronic 555.0
- Clostridium
- botulinum 005.1
- difficile 008.45
- haemolyticum 008.46
- novyi 008.46
- perfringens C F 008.46
- coccidial 007.2
- dietetic 558.9
- due to
- achylia gastrica 536.8
- adenovirus 008.62
- Aerobacter aerogenes 008.2
- anaerobes SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis anaerobic 008.46
- Arizona bacillus 008.1
- astrovirus 008.66
- Bacillus coli see Enteritis E. coli
- Bacteroides SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis Bacteroides 008.46
- Butyrivibrio fibriosolvens 008.46
- calicivirus 008.65
- Camplyobacter 008.43
- Clostridium see Enteritis Clostridium
- Cockle agent 008.64
- Coxsackie virus 008.67
- Ditchling agent 008.64
- ECHO virus 008.67
- Enterobacter aerogenes 008.2
- enterococci 008.49
- Escherichia coli see Enteritis E. coli
- Eubacterium 008.46
- Fusobacterium nucleatum 008.46
- gram negative bacteria NEC NEC "Not elsewhere classifiable"
This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular. 008.47
- Hawaii agent 008.63
- irritating foods 558.9
- Klebsiella aerogenes 008.47
- Marin County agent 008.66
- Montgomery County agent 008.63
- norovirus 008.63
- Norwalk like agent 008.63
- Norwalk virus 008.63
- Otofuke agent 008.63
- Paracolobactrum arizonae 008.1
- paracolon bacillus NEC NEC "Not elsewhere classifiable"
This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular. 008.47- arizona 008.1
- Paramatta agent 008.64
- Peptococcus 008.46
- Peptostreptococcus 008.46
- Proprionibacterium 008.46
- Proteus bacillus mirabilis morganii 008.3
- Pseudomonas aeruginosa 008.42
- Rotavirus 008.61
- Sapporo agent 008.63
- small round virus SRV NEC NEC "Not elsewhere classifiable"
This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular. 008.64
- Snow Mountain SM agent 008.63
- specified
- Staphylococcus 008.41
- Streptococcus 008.49
- anaerobic 008.46
- Taunton agent 008.63
- Torovirus 008.69
- Treponema 008.46
- Veillonella 008.46
- virus 008.8
- Wollan W agent 008.64
- Yersinia enterocolitica 008.44
- dysentery see Dysentery
- E. coli 008.00
- enterohemorrhagic 008.04
- enteroinvasive 008.03
- enteropathogenic 008.01
- enterotoxigenic 008.02
- El Tor 001.1
- embadomonial 007.8
- eosinophilic 558.41
- epidemic 009.0
- Eubacterium 008.46
- fermentative 558.9
- fulminant 557.0
- Fusobacterium nucleatum 008.46
- gangrenous SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis due to by organism 009.0
- giardial 007.1
- gram negative bacteria NEC NEC "Not elsewhere classifiable"
This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular. 008.47
- infectious NEC NEC "Not elsewhere classifiable"
This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular. SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis due to by organism 009.0- presumed 009.1
- influenzal SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Influenza 487.8
- ischemic 557.9
- acute 557.0
- chronic 557.1
- due to mesenteric artery insufficiency 557.1
- membranous 564.9
- mucous 564.9
- myxomembranous 564.9
- NEC NEC "Not elsewhere classifiable"
This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular.rotic SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis due to by organism 009.0
- NEC NEC "Not elsewhere classifiable"
This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular.rotizing of fetus or newborn SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enterocolitis NEC NEC "Not elsewhere classifiable"
This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular.rotizing newborn 777.50
- neurogenic 564.9
- newborn 777.8
- NEC NEC "Not elsewhere classifiable"
This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular.rotizing SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enterocolitis NEC NEC "Not elsewhere classifiable"
This abbreviation in the index represents “other specified” when a specific code is not available for a condition the index directs the coder to the “other specified” code in the tabular.rotizing newborn 777.50
- NEC NEC "Not elsewhere classifiable"
- paratyphoid fever SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Fever paratyphoid 002.9
- Peptococcus 008.46
- Peptostreptococcus 008.46
- Proprionibacterium 008.46
- radiation 558.1
- regional of 555.9
- intestine
- large bowel colon or rectum 555.1
- with small intestine 555.2
- small duodenum ileum or jejunum 555.0
- with large intestine 555.2
- large bowel colon or rectum 555.1
- intestine
- Salmonella infection 003.0
- salmonellosis 003.0
- segmental SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis regional 555.9
- septic SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis due to by organism 009.0
- Shigella 004.9
- simple 558.9
- spasmodic 564.9
- spastic 564.9
- staphylococcal 008.41
- due to food 005.0
- streptococcal 008.49
- anaerobic 008.46
- toxic 558.2
- Treponema denticola macrodentium 008.46
- trichomonal 007.3
- tuberculous SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Tuberculosis 014.8
- typhosa 002.0
- ulcerative chronic SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Colitis ulcerative 556.9
- Veillonella 008.46
- viral 008.8
- adenovirus 008.62
- enterovirus 008.67
- Yersinia enterocolitica 008.44
- zymotic 009.0
- Gastroenteritis acute catarrhal congestive hemorrhagic noninfectious SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis 558.9- aertrycke infection 003.0
- allergic 558.3
- chronic 558.9
- ulcerative SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Colitis ulcerative 556.9
- ulcerative SEE ALSO See Also
- dietetic 558.9
- due to
- antineoplastic chemotherapy 558.9
- food poisoning SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Poisoning food 005.9
- radiation 558.1
- eosinophilic 558.41
- epidemic 009.0
- functional 558.9
- infectious SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis due to by organism 009.0- presumed 009.1
- salmonella 003.0
- septic SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis due to by organism 009.0
- toxic 558.2
- tuberculous SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Tuberculosis 014.8
- ulcerative SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Colitis ulcerative 556.9
- zymotic 009.0
- Ileitis chronic SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis 558.9- infectious 009.0
- noninfectious 558.9
- regional ulcerative 555.0
- with large intestine 555.2
- segmental 555.0
- with large intestine 555.2
- terminal ulcerative 555.0
- with large intestine 555.2
- Ileocolitis SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis 558.9- infectious 009.0
- regional 555.2
- ulcerative 556.1
- Inflammation inflamed inflammatory with exudation
- colon SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis 558.9- granulomatous 555.1
- newborn 558.9
- gastrointestinal SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis 558.9
- ileum SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis 558.9- terminal or regional 555.0
- with large intestine 555.2
- terminal or regional 555.0
- intestine SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis 558.9
- colon SEE ALSO See Also
- Jejunitis SEE ALSO See Also
A “see also” instruction following a main term in the index instructs that there is another main term that may also be referenced that may provide additional index entries that may be useful. It is not necessary to follow the “see also” note when the original main term provides the necessary code. Enteritis 558.9
Information for Patients
Colonic Diseases
Your colon, also known as the large intestine, is part of your digestive system. It's a long, hollow tube at the end of your digestive tract where your body makes and stores stool. Many disorders affect the colon's ability to work properly. Some of these include:
- Colorectal cancer
- Colonic polyps - extra tissue growing in the colon that can become cancerous
- Ulcerative colitis - ulcers of the colon and rectum
- Diverticulitis - inflammation or infection of pouches in the colon
- Irritable bowel syndrome - an uncomfortable condition causing abdominal cramping and other symptoms
Treatment for colonic diseases varies greatly depending on the disease and its severity. Treatment may involve diet, medicines and in some cases, surgery.
NIH: National Institute of Diabetes and Digestive and Kidney Diseases
[Read More]
Small Intestine Disorders
Your small intestine is the longest part of your digestive system - about twenty feet long! It connects your stomach to your large intestine (or colon) and folds many times to fit inside your abdomen. Your small intestine does most of the digesting of the foods you eat. It has three areas called the duodenum, the ileum, and the jejunum.
Problems with the small intestine can include:
- Bleeding
- Celiac disease
- Crohn's disease
- Infections
- Intestinal cancer
- Intestinal obstruction
- Irritable bowel syndrome
- Ulcers, such as peptic ulcer
Treatment of disorders of the small intestine depends on the cause.
[Read More]
ICD-9 Footnotes
General Equivalence Map Definitions
The ICD-9 and ICD-10 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
- Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
- No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
- Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.
Index of Diseases and Injuries Definitions
- And - The word "and" should be interpreted to mean either "and" or "or" when it appears in a title.
- Code also note - A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
- Code first - Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
- Type 1 Excludes Notes - A type 1 Excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- Type 2 Excludes Notes - A type 2 Excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- Includes Notes - This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- Inclusion terms - List of terms is included under some codes. These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- NEC "Not elsewhere classifiable" - This abbreviation in the Alphabetic Index represents "other specified". When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified” code in the Tabular List.
- NOS "Not otherwise specified" - This abbreviation is the equivalent of unspecified.
- See - The "see" instruction following a main term in the Alphabetic Index indicates that another term should be referenced. It is necessary to go to the main term referenced with the "see" note to locate the correct code.
- See Also - A "see also" instruction following a main term in the Alphabetic Index instructs that there is another main term that may also be referenced that may provide additional Alphabetic Index entries that may be useful. It is not necessary to follow the "see also" note when the original main term provides the necessary code.
- 7th Characters - Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
- With - The word "with" should be interpreted to mean "associated with" or "due to" when it appears in a code title, the Alphabetic Index, or an instructional note in the Tabular List. The word "with" in the Alphabetic Index is sequenced immediately following the main term, not in alphabetical order.