Clinical Classifications Software (CCS)

CCS is a tool for clustering patient diagnoses and procedures into a manageable number of clinically meaningful categories developed at the Agency for Healthcare Research and Quality (AHRQ, formerly known as the Agency for Health Care Policy and Research). CCS is used for grouping conditions and procedures without having to wade through thousands of codes. This "clinical grouper" makes it easier to quickly understand patterns of diagnoses and procedures so that health plans, policymakers, and researchers can analyze costs, utilization, and outcomes associated with particular illnesses and procedures.

CCS collapses diagnosis and procedure codes from the International Classification of Diseases, 9th Revision, Clinical Modification (IDC-9-CM), which contains over 12,000 diagnosis codes and 3,500 procedure codes. Without CCS, the large number of ICD-9-CM codes poses difficulties in statistical analysis and reporting. (See

Code List

(last updated September 2005)

CCS Diagnosis CodesCCS Procedure Codes
CCS CodeDefinitionCCS CodeDefinition
0 No diagnosis0 No procedure
1 Tuberculosis1 Incision and excision of CNS
2 Septicemia (except in labor)2 Insertion, replacement, or removal of extracranial ventricular shunt
3 Bacterial infection, unspecified site3 Laminectomy, excision intervertebral disc
4 Mycoses4 Diagnostic spinal tap
5 HIV infection5 Insertion of catheter or spinal stimulator and injection into spinal canal
6 Hepatitis6 Decompression peripheral nerve
7 Viral infection7 Other diagnostic nervous system procedures
8 Other infections, including parasiticn8 Other non-OR or closed therapeutic nervous system procedures
9 Sexually transmitted infections (not HIV or hepatitis)9 Other OR therapeutic nervous system procedures
10 Immunizations and screening for infectious disease10 Thyroidectomy, partial or complete
11 Cancer of head and neck11 Diagnostic endocrine procedures
12 Cancer of esophagus12 Other therapeutic endocrine procedures
13 Cancer of stomach13 Corneal transplant
14 Cancer of colon14 Glaucoma procedures
15 Cancer of rectum and anus15 Lens and cataract procedures
16 Cancer of liver and intrahepatic bile duct16 Repair of retinal tear, detachment
17 Cancer of pancreas17 Destruction of lesion of retina and choroid
18 Cancer of other GI organs, peritoneum18 Diagnostic procedures on eye
19 Cancer of bronchus, lung<19 Other therapeutic procedures on eyelids, conjunctiva, cornea
20 Cancer, other respiratory and intra thoracic20 Other intraocular therapeutic procedures
21 Cancer of bone and connective tissue21 Other extraocular muscle and orbit therapeutic procedures
22 Melanomas of skin22 Tympanoplasty
23 Other non-epithelial cancer of skin23 Myringotomy
24 Cancer of breast24 Mastoidectomy
25 Cancer of uterus25 Diagnostic procedures on ear
26 Cancer of cervix26 Other therapeutic ear procedures
27 Cancer of ovary27 Control of epistaxis
28 Cancer of other female genital organs28 Plastic procedures on nose
29 Cancer of prostate29 Dental procedures
30 Cancer of testis30 Tonsillectomy and/or adenoidectomy
31 Cancer of other male genital organs31 Diagnostic procedures on nose, mouth and pharynx
32 Cancer of bladder32 Other non-OR therapeutic procedures on nose, mouth and pharynx
33 Cancer of kidney and renal pelvis33 Other OR therapeutic procedures on nose, mouth and pharynx
34 Cancer of other urinary organs34 Tracheostomy, temporary and permanent
35 Cancer of brain and nervous system35 Tracheoscopy and laryngoscopy with biopsy
36 Cancer of thyroid36 Lobectomy or pneumonectomy
37 Hodgkins disease37 Diagnostic bronchoscopy and biopsy of bronchus
38 Non-Hodgkins lymphoma38 Other diagnostic procedures on lung and bronchus
39 Leukemias39 Incision of pleura, thoracentesis, chest drainage
40 Multiple myeloma40 Other diagnostic procedures of respiratory tract and mediastinum
41 Cancer, other and unspecified primary41 Other non-OR therapeutic procedures on respiratory system
42 Secondary malignancies42 Other OR therapeutic procedures on respiratory system
43 Malignant neoplasm without specification of site43 Heart valve procedures
44 Neoplasms of unspecified nature or uncertain behavior44 Coronary artery bypass graft (CABG)
45 Maintenance chemotherapy, radiotherapy45 Percutaneous transluminal coronary angioplasty (PTCA)
46 Benign neoplasm of uterus46 Coronary thrombolysis
47 Other and unspecified benign neoplasm47 Diagnostic cardiac catheterization, coronary arteriography
48 Thyroid disorders48 Insertion, revision, replacement, removal of cardiac pacemaker or cardioverter/defibrillator
49 Diabetes mellitus without complication49 Other OR heart procedures
50 Diabetes mellitus with complications50 Extracorporeal circulation auxiliary to open heart procedures
51 Other endocrine disorders51 Endarterectomy, vessel of head and neck
52 Nutritional deficiencies52 Aortic resection, replacement or anastomosis
53 Disorders of lipid metabolism53 Varicose vein stripping, lower limb
54 Gout and other crystal arthropathies54 Other vascular catheterization, not heart
55 Fluid and electrolyte disorders55 Peripheral vascular bypass
56 Cystic fibrosis56 Other vascular bypass and shunt, not heart
57 Immunity disorders57 Creation, revision and removal of arteriovenous fistula or vessel-to-vessel cannula for dialysis
58 Other nutritional, endocrine, and metabolic disorders58 Hemodialysis
59 Deficiency and other anemia59 Other OR procedures on vessels of head and neck
60 Acute posthemorrhagic anemia60 Embolectomy and endarterectomy of lower limbs
61 Sickle cell anemia61 Other OR procedures on vessels other than head and neck
62 Coagulation and hemorrhagic disorders62 Other diagnostic cardiovascular procedures
63 Diseases of white blood cells63 Other non-OR therapeutic cardiovascular procedures
64 Other hematologic conditions64 Bone marrow transplant
65 Mental retardation65 Bone marrow biopsy
66 Alcohol-related mental disorders66 Procedures on spleen
67 Substance-related mental disorders67 Other therapeutic procedures, hemic and lymphatic system
68 Senility and organic mental disorders68 Injection or ligation of esophageal varices
69 Affective disorders69 Esophageal dilatation
70 Schizophrenia and related disorders70 Upper gastrointestinal endoscopy, biopsy
71 Other psychoses71 Gastrostomy, temporary and permanent
72 Anxiety, somatoform, dissociative, and personality disorders72 Colostomy, temporary and permanent
73 Preadult disorders73 Ileostomy and other enterostomy
74 Other mental conditions74 Gastrectomy, partial and total
75 Personal history of mental disorder, mental and behavioral problems75 Small bowel resection
76 Meningitis (except by TB or STDs)76 Colonoscopy and biopsy
77 Encephalitis (except by TB or STDs)77 Proctoscopy and anorectal biopsy
78 Other CNS infection and poliomyelitis78 Colorectal resection
79 Parkinsons disease79 Local excision of large intestine lesion (not endoscopic)
80 Multiple sclerosiss80 Appendectomy
81 Other hereditary and degenerative nervous system conditions81 Hemorrhoid procedures
82 Paralysis82 Endoscopic retrograde cannulation of pancreas (ERCP)
83 Epilepsy, convulsions83 Biopsy of liver
84 Headache, including migraine84 Cholecystectomy and common duct exploration
85 Coma, stupor, and brain damage85 Inguinal and femoral hernia repair
86 Cataract86 Other hernia repair
87 Retinal detachments, defects, vascular occlusion,and retinopathy<87 Laparoscopy
88 Glaucoma88 Abdominal paracentesis
89 Blindness and vision defects89 Exploratory laparotomy
90 Inflammation, infection of eye (no TB or STD s)90 Excision, lysis peritoneal adhesions
91 Other eye disorders91 Peritoneal dialysis
92 Otitis media and related conditions92 Other bowel diagnostic procedures
93 Conditions associated with dizziness or vertigo93 Other non-OR upper GI therapeutic procedures
94 Other ear and sense organ disorders94 Other OR upper GI therapeutic procedures
95 Other nervous system disorders95 Other non-OR lower GI therapeutic procedures
96 Heart valve disorders96 Other OR lower GI therapeutic procedures
97 Peri-, endo-, and myocarditis, cardiomyopathy(no TB or STDs)97 Other gastrointestinal diagnostic procedures
98 Essential hypertension98 Other non-OR gastrointestinal therapeutic procedures
99 Hypertension with complications and secondary hypertension99 Other OR gastrointestinal therapeutic procedures
100 Acute myocardial infarction100 Endoscopy and endoscopic biopsy of the urinary tract
101 Coronary atherosclerosis and other heart disease101 Transurethral excision, drainage, or removal urinary obstruction
102 Nonspecific chest pain102 Ureteral catheterization
103 Pulmonary heart disease103 Nephrotomy and nephrostomy
104 Other and ill-defined heart disease104 Nephrectomy, partial or complete
105 Conduction disorders105 Kidney transplant
106 Cardiac dysrhythmias106 Genitourinary incontinence procedures
107 Cardiac arrest and ventricular fibrillation107 Extracorporeal lithotripsy, urinary
108 Congestive heart failure, nonhypertensive108 Indwelling catheter
109 Acute cerebrovascular disease109 Procedures on the urethra
110 Occlusion or stenosis of precerebral arteries110 Other diagnostic procedures of urinary tract
111 Other and ill-defined cerebrovascular disease111 Other non-OR therapeutic procedures of urinary tract
112 Transient cerebral ischemia112 Other OR therapeutic procedures of urinary tract
113 Late effects of cerebrovascular disease113 Transurethral resection of prostate (TURP)
114 Peripheral and visceral atherosclerosis114 Open prostatectomy
115 Aortic, peripheral, and visceral artery aneurysms115 Circumcision
116 Aortic and peripheral arterial embolism or thrombosis116 Diagnostic procedures, male genital
117 Other circulatory disease117 Other non-OR therapeutic procedures, male genital
118 Phlebitis, thrombophlebitis and thromboembolism118 Other OR therapeutic procedures, male genital
119 Varicose veins of lower extremity119 Oophorectomy, unilateral and bilateral
120 Hemorrhoids120 Other operations on ovary
121 Other diseases of veins and lymphatics121 Ligation of fallopian tubes
122 Pneumonia (except that caused by tuberculosis or STDs122 Removal of ectopic pregnancy
123 Influenza123 Other operations on fallopian tubes
124 Acute and chronic tonsillitis124 Hysterectomy, abdominal and vaginal
125 Acute bronchitis125 Other excision of cervix and uterus
126 Other upper respiratory infections126 Abortion (termination of pregnancy)
127 Chronic obstructive pulmonary disease and bronchiectasis127 Dilatation and curettage (D&C), aspiration after delivery or abortion
128 Asthma128 Diagnostic dilatation and curettage (D&C)
129 Aspiration pneumonitis, food/vomitus129 Repair of cystocele and rectocele, obliteration of vaginal vault
130 Pleurisy, pneumothorax, pulmonary collapse130 Other diagnostic procedures, female organs
131 Respiratory failure, insufficiency, arrest (adult)131 Other non-OR therapeutic procedures, female organs
132 Lung disease due to external agents132 Other OR therapeutic procedures, female organs
133 Other lower respiratory disease133 Episiotomy
134 Other upper respiratory disease134 Cesarean section
135 Intestinal infection135 Forceps, vacuum, and breech delivery
136 Disorders of teeth and jaw136 Artificial rupture of membranes to assist delivery
137 Diseases of mouth, excluding dental137 Other procedures to assist delivery
138 Esophageal disorders138 Diagnostic amniocentesis
139 Gastroduodenal ulcer (except hemorrhage)139 Fetal monitoring
140 Gastritis and duodenitis140 Repair of current obstetric laceration
141 Other disorders of stomach and duodenum141 Other therapeutic obstetrical procedures
142 Appendicitis and other appendiceal conditions142 Partial excision bone
143 Abdominal hernia143 Bunionectomy or repair of toe deformities
144 Regional enteritis and ulcerative colitis144 Treatment, facial fracture or dislocation
145 Intestinal obstruction without hernia145 Treatment, fracture or dislocation of radius and ulna
146 Diverticulosis and diverticulitis146 Treatment, fracture or dislocation of hip and femur
147 Anal and rectal conditions147 Treatment, fracture or dislocation of lower extremity (other than hip or femur)
148 Peritonitis and intestinal abscess148 Other fracture and dislocation procedure
149 Biliary tract disease149 Arthroscopy
150 Liver disease, alcohol-related150 Division of joint capsule, ligament or cartilage
151 Other liver diseases151 Excision of semilunar cartilage of knee
152 Pancreatic disorders (not diabetes)152 Arthroplasty knee
153 Gastrointestinal hemorrhage153 Hip replacement, total and partial
154 Noninfectious gastroenteritis154 Arthroplasty other than hip or knee
155 Other gastrointestinal disorders155 Arthrocentesis
156 Nephritis, nephrosis, renal sclerosis156 Injections and aspirations of muscles, tendons, bursa, joints and soft tissue
157 Acute and unspecified renal failure157 Amputation of lower extremity
158 Chronic renal failure158 Spinal fusion
159 Urinary tract infections159 Other diagnostic procedures on musculoskeletal system
160 Calculus of urinary tract160 Other therapeutic procedures on muscles and tendons
161 Other diseases of kidney and ureters161 Other OR therapeutic procedures on bone
162 Other diseases of bladder and urethra162 Other OR therapeutic procedures on joints
163 Genitourinary symptoms and ill-defined conditions163 Other non-OR therapeutic procedures on musculoskeletal system
164 Hyperplasia of prostate164 Other OR therapeutic procedures on musculoskeletal system
165 Inflammatory conditions of male genital organs165 Breast biopsy and other diagnostic procedures on breast
166 Other male genital disorders166 Lumpectomy, quadrantectomy of breast
167 Nonmalignant breast conditions167 Mastectomy
168 Inflammatory diseases of female pelvic organs168 Incision and drainage, skin and subcutaneous tissue
169 Endometriosis169 Debridement of wound, infection or burn
170 Prolapse of female genital organsn170 Excision of skin lesion
171 Menstrual disorders171 Suture of skin and subcutaneous tissue
172 Ovarian cyst172 Skin graft
173 Menopausal disorders173 Other diagnostic procedures on skin and subcutaneous tissue
174 Female infertility174 Other non-OR therapeutic procedures on skin and breast
175 Other female genital disorders175 Other OR therapeutic procedures on skin and breast
176 Contraceptive and procreative management176 Other organ transplantation
177 Spontaneous abortion177 Computerized axial tomography (CT) scan head
178 Induced abortion178 CT scan chest
179 Postabortion complications179 CT scan abdomen
180 Ectopic pregnancy180 Other CT scan
181 Other complications of pregnancy181 Myelogram
182 Hemorrhage during pregnancy, abruptio placenta,placenta previa182 Mammography
183 Hypertension complicating pregnancy, childbirth and the puerperium183 Routine chest X-ray
184 Early or threatened labor184 Intraoperative cholangiogram
185 Prolonged pregnancy185 Upper gastrointestinal X-ray
186 Diabetes complicating pregnancy or birth186 Lower gastrointestinal X-ray
187 Malposition, malpresentation187 Intravenous pyelogram
188 Fetopelvic disproportion, obstruction188 Cerebral arteriogram
189 Previous C-section189 Contrast aortogram
190 Fetal distress and abnormal forces of labor190 Contrast arteriogram of femoral and lower extremity arteries
191 Polyhydramnios and other problems of amniotic cavity191 Arterio- or venogram (not heart and head)
192 Umbilical cord complication192 Diagnostic ultrasound of head and neck
193 Trauma to perineum and vulva193 Diagnostic ultrasound of heart (echocardiogram)
194 Forceps delivery194 Diagnostic ultrasound of gastrointestinal tract
195 Other complications of birth195 Diagnostic ultrasound of urinary tract
196 Normal pregnancy and/or delivery196 Diagnostic ultrasound of abdomen or retroperitoneum
197 Skin and subcutaneous tissue infections197 Other diagnostic ultrasound
198 Other inflammatory condition of skin198 Magnetic resonance imaging
199 Chronic ulcer of skin199 Electroencephalogram (EEG)
200 Other skin disorders200 Nonoperative urinary system measurements
201 Infective arthritis and osteomyelitis201 Cardiac stress tests
202 Rheumatoid arthritis and related disease202Electrocardiogram
203 Osteoarthritis203 Electrographic cardiac monitoring
204 Other non-traumatic joint disorders204 Swan-Ganz catheterization for monitoring
205 Spondylosis, intervertebral disc disorders, back problems205 Arterial blood gases
206 Osteoporosis206 Microscopic examination (bacterial smear, culture, toxicology)
207 Pathological fracture207 Radioisotope bone scan
208 Acquired foot deformities208 Radioisotope pulmonary scan
209 Other acquired deformities209 Radioisotope scan and function studies
210 Systemic lupus erythematosus and connective tissue disorders210 Other radioisotope scan
211 Other connective tissue disease211 Therapeutic radiology
212 Other bone disease and musculoskeletal deformities212 Diagnostic physical therapy
213 Cardiac and circulatory congenital anomalies213 Physical therapy exercises, manipulation, and other procedures
214 Digestive congenital anomalies214 Traction, splints, and other wound care
215 Genitourinary congenital anomalies215 Other physical therapy and rehabilitation
216 Nervous system congenital anomalies216 Respiratory intubation and mechanical ventilation
217 Other congenital anomalies217 Other respiratory therapy
218 Liveborn218 Psychological and psychiatric evaluation and therapy
219 Short gestation, L.B.Wt, and fetal growth retardation219 Alcohol and drug rehabilitation/detoxification
220 Intrauterine hypoxia and birth asphyxia220 Ophthalmologic and otologic diagnosis and treatment
221 Respiratory distress syndrome<221 Nasogastric tube
222 Hemolytic jaundice and perinatal jaundice222 Blood transfusion
223 Birth trauma223 Enteral and parenteral nutrition
224 Other perinatal conditions224 Cancer chemotherapy
225 Joint disorders and dislocations, trauma-related225 Conversion of cardiac rhythm
226 Fracture of neck of femur (hip)226 Other diagnostic radiology and related techniques
227 Spinal cord injury227 Other diagnostic procedures (interview, evaluation, consultation)
228 Skull and face fractures228 Prophylactic vaccinations and inoculations
229 Fracture of upper limb229 Nonoperative removal of foreign body
230 Fracture of lower limb230 Extracorporeal shock wave lithotripsy, other than urinary
231 Other fractures231 Other therapeutic procedures
232 Sprains and strains232 Unclassified
233 Intracranial injury
234 Crushing injury or internal injury
235 Open wounds of head, neck, and trunk
236 Open wounds of extremities
237 Complication of device, implant or graft
238 Complications of surgical procedures or medical care
239 Superficial injury, contusion
240 Burns
241 Poisoning by psychotropic agents
242 Poisoning by other medications and drugs
243 Poisoning by nonmedicinal substances
244 Other injuries and conditions due to external causes
245 Syncope
246 Fever of unknown origin
247 Lymphadenitis
248 Gangrene
249 Shock
250 Nausea and vomiting
251 Abdominal pain
252 Malaise and fatigue
253 Allergic reactions
254 Rehabilitation care, fitting of prostheses
255 Administrative/social admission
256 Medical examination/evaluation
257 Other aftercare
258 Other screening for suspected conditions
259 Residual codes, unclassified
260E (external causes of injury and poisoning) codes

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