Developed at the Agency for Healthcare Research and Quality (AHRQ), the Clinical Classifications Software (CCS) is a tool for clustering patient diagnoses and procedures into a manageable number of clinically meaningful categories. CCS offers researchers the ability to group conditions and procedures without having to sort through thousands of codes. This "clinical grouper" makes it easier to quickly understand patterns of diagnoses and procedures so that health plans, policy makers, 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 more than 13,600 diagnosis codes and 3,700 procedure codes. Without the CCS tool, the large number of ICD-9-CM codes makes statistical analysis and reporting difficult and time-consuming. For more information, see AHRQ's CCS Fact Sheet.

The NJSHAD system uses CCS Procedure Groups in the Inpatient Hospital Discharge Query Module.

CCS Code	CCS Procedure Group
0	No procedure
1	Incision and excision of CNS
2	Insertion, replacement, or removal of extracranial ventricular shunt
3	Laminectomy, excision intervertebral disc
4	Diagnostic spinal tap
5	Insertion of catheter or spinal stimulator and injection into spinal canal
6	Decompression peripheral nerve
7	Other diagnostic nervous system procedures
8	Other non-OR or closed therapeutic nervous system procedures
9	Other OR therapeutic nervous system procedures
10	Thyroidectomy, partial or complete
11	Diagnostic endocrine procedures
12	Other therapeutic endocrine procedures
13	Corneal transplant
14	Glaucoma procedures
15	Lens and cataract procedures
16	Repair of retinal tear, detachment
17	Destruction of lesion of retina and choroid
18	Diagnostic procedures on eye
19	Other therapeutic procedures on eyelids, conjunctiva, cornea
20	Other intraocular therapeutic procedures
21	Other extraocular muscle and orbit therapeutic procedures
22	Tympanoplasty
23	Myringotomy
24	Mastoidectomy
25	Diagnostic procedures on ear
26	Other therapeutic ear procedures
27	Control of epistaxis
28	Plastic procedures on nose
29	Dental procedures
30	Tonsillectomy and/or adenoidectomy
31	Diagnostic procedures on nose, mouth and pharynx
32	Other non-OR therapeutic procedures on nose, mouth and pharynx
33	Other OR therapeutic procedures on nose, mouth and pharynx
34	Tracheostomy, temporary and permanent
35	Tracheoscopy and laryngoscopy with biopsy
36	Lobectomy or pneumonectomy
37	Diagnostic bronchoscopy and biopsy of bronchus
38	Other diagnostic procedures on lung and bronchus
39	Incision of pleura, thoracentesis, chest drainage
40	Other diagnostic procedures of respiratory tract and mediastinum
41	Other non-OR therapeutic procedures on respiratory system
42	Other OR therapeutic procedures on respiratory system
43	Heart valve procedures
44	Coronary artery bypass graft (CABG)
45	Percutaneous transluminal coronary angioplasty (PTCA)
46	Coronary thrombolysis
47	Diagnostic cardiac catheterization, coronary arteriography
48	Insertion, revision, replacement, removal of cardiac pacemaker or cardioverter/defibrillator
49	Other OR heart procedures
50	Extracorporeal circulation auxiliary to open heart procedures
51	Endarterectomy, vessel of head and neck
52	Aortic resection, replacement or anastomosis
53	Varicose vein stripping, lower limb
54	Other vascular catheterization, not heart
55	Peripheral vascular bypass
56	Other vascular bypass and shunt, not heart
57	Creation, revision and removal of arteriovenous fistula or vessel-to-vessel cannula for dialysis
58	Hemodialysis
59	Other OR procedures on vessels of head and neck
60	Embolectomy and endarterectomy of lower limbs
61	Other OR procedures on vessels other than head and neck
62	Other diagnostic cardiovascular procedures
63	Other non-OR therapeutic cardiovascular procedures
64	Bone marrow transplant
65	Bone marrow biopsy
66	Procedures on spleen
67	Other therapeutic procedures, hemic and lymphatic system
68	Injection or ligation of esophageal varices
69	Esophageal dilatation
70	Upper gastrointestinal endoscopy, biopsy
71	Gastrostomy, temporary and permanent
72	Colostomy, temporary and permanent
73	Ileostomy and other enterostomy
74	Gastrectomy, partial and total
75	Small bowel resection
76	Colonoscopy and biopsy
77	Proctoscopy and anorectal biopsy
78	Colorectal resection
79	Local excision of large intestine lesion (not endoscopic)
80	Appendectomy
81	Hemorrhoid procedures
82	Endoscopic retrograde cannulation of pancreas (ERCP)
83	Biopsy of liver
84	Cholecystectomy and common duct exploration
85	Inguinal and femoral hernia repair
86	Other hernia repair
87	Laparoscopy
88	Abdominal paracentesis
89	Exploratory laparotomy
90	Excision, lysis peritoneal adhesions
91	Peritoneal dialysis
92	Other bowel diagnostic procedures
93	Other non-OR upper GI therapeutic procedures
94	Other OR upper GI therapeutic procedures
95	Other non-OR lower GI therapeutic procedures
96	Other OR lower GI therapeutic procedures
97	Other gastrointestinal diagnostic procedures
98	Other non-OR gastrointestinal therapeutic procedures
99	Other OR gastrointestinal therapeutic procedures
100	Endoscopy and endoscopic biopsy of the urinary tract
101	Transurethral excision, drainage, or removal urinary obstruction
102	Ureteral catheterization
103	Nephrotomy and nephrostomy
104	Nephrectomy, partial or complete
105	Kidney transplant
106	Genitourinary incontinence procedures
107	Extracorporeal lithotripsy, urinary
108	Indwelling catheter
109	Procedures on the urethra
110	Other diagnostic procedures of urinary tract
111	Other non-OR therapeutic procedures of urinary tract
112	Other OR therapeutic procedures of urinary tract
113	Transurethral resection of prostate (TURP)
114	Open prostatectomy
115	Circumcision
116	Diagnostic procedures, male genital
117	Other non-OR therapeutic procedures, male genital
118	Other OR therapeutic procedures, male genital
119	Oophorectomy, unilateral and bilateral
120	Other operations on ovary
121	Ligation of fallopian tubes
122	Removal of ectopic pregnancy
123	Other operations on fallopian tubes
124	Hysterectomy, abdominal and vaginal
125	Other excision of cervix and uterus
126	Abortion (termination of pregnancy)
127	Dilatation and curettage (D&C), aspiration after delivery or abortion
128	Diagnostic dilatation and curettage (D&C)
129	Repair of cystocele and rectocele, obliteration of vaginal vault
130	Other diagnostic procedures, female organs
131	Other non-OR therapeutic procedures, female organs
132	Other OR therapeutic procedures, female organs
133	Episiotomy
134	Cesarean section
135	Forceps, vacuum, and breech delivery
136	Artificial rupture of membranes to assist delivery
137	Other procedures to assist delivery
138	Diagnostic amniocentesis
139	Fetal monitoring
140	Repair of current obstetric laceration
141	Other therapeutic obstetrical procedures
142	Partial excision bone
143	Bunionectomy or repair of toe deformities
144	Treatment, facial fracture or dislocation
145	Treatment, fracture or dislocation of radius and ulna
146	Treatment, fracture or dislocation of hip and femur
147	Treatment, fracture or dislocation of lower extremity (other than hip or femur)
148	Other fracture and dislocation procedure
149	Arthroscopy
150	Division of joint capsule, ligament or cartilage
151	Excision of semilunar cartilage of knee
152	Arthroplasty knee
153	Hip replacement, total and partial
154	Arthroplasty other than hip or knee
155	Arthrocentesis
156	Injections and aspirations of muscles, tendons, bursa, joints and soft tissue
157	Amputation of lower extremity
158	Spinal fusion
159	Other diagnostic procedures on musculoskeletal system
160	Other therapeutic procedures on muscles and tendons
161	Other OR therapeutic procedures on bone
162	Other OR therapeutic procedures on joints
163	Other non-OR therapeutic procedures on musculoskeletal system
164	Other OR therapeutic procedures on musculoskeletal system
165	Breast biopsy and other diagnostic procedures on breast
166	Lumpectomy, quadrantectomy of breast
167	Mastectomy
168	Incision and drainage, skin and subcutaneous tissue
169	Debridement of wound, infection or burn
170	Excision of skin lesion
171	Suture of skin and subcutaneous tissue
172	Skin graft
173	Other diagnostic procedures on skin and subcutaneous tissue
174	Other non-OR therapeutic procedures on skin and breast
175	Other OR therapeutic procedures on skin and breast
176	Other organ transplantation
177	Computerized axial tomography (CT) scan head
178	CT scan chest
179	CT scan abdomen
180	Other CT scan
181	Myelogram
182	Mammography
183	Routine chest X-ray
184	Intraoperative cholangiogram
185	Upper gastrointestinal X-ray
186	Lower gastrointestinal X-ray
187	Intravenous pyelogram
188	Cerebral arteriogram
189	Contrast aortogram
190	Contrast arteriogram of femoral and lower extremity arteries
191	Arterio- or venogram (not heart and head)
192	Diagnostic ultrasound of head and neck
193	Diagnostic ultrasound of heart (echocardiogram)
194	Diagnostic ultrasound of gastrointestinal tract
195	Diagnostic ultrasound of urinary tract
196	Diagnostic ultrasound of abdomen or retroperitoneum
197	Other diagnostic ultrasound
198	Magnetic resonance imaging
199	Electroencephalogram (EEG)
200	Nonoperative urinary system measurements
201	Cardiac stress tests
202	Electrocardiogram
203	Electrographic cardiac monitoring
204	Swan-Ganz catheterization for monitoring
205	Arterial blood gases
206	Microscopic examination (bacterial smear, culture, toxicology)
207	Radioisotope bone scan
208	Radioisotope pulmonary scan
209	Radioisotope scan and function studies
210	Other radioisotope scan
211	Therapeutic radiology
212	Diagnostic physical therapy
213	Physical therapy exercises, manipulation, and other procedures
214	Traction, splints, and other wound care
215	Other physical therapy and rehabilitation
216	Respiratory intubation and mechanical ventilation
217	Other respiratory therapy
218	Psychological and psychiatric evaluation and therapy
219	Alcohol and drug rehabilitation/detoxification
220	Ophthalmologic and otologic diagnosis and treatment
221	Nasogastric tube
222	Blood transfusion
223	Enteral and parenteral nutrition
224	Cancer chemotherapy
225	Conversion of cardiac rhythm
226	Other diagnostic radiology and related techniques
227	Other diagnostic procedures (interview, evaluation, consultation)
228	Prophylactic vaccinations and inoculations
229	Nonoperative removal of foreign body
230	Extracorporeal shock wave lithotripsy, other than urinary
231	Other therapeutic procedures
232	Unclassified