CPT Code Hierarchy
Current Procedural Terminology, or CPT, is a medical code set and is a common terminology for doctors, goverment, health insurance agencies, and other organizations. CPT codes are used during the medical billing process to classify procedures.
There are six Category 1 CPT codes. They are Anesthesia, Evaluation and Management, Medicine, Pathology and Laboratory, Radiology, and Surgery. Each of these Category 1 CPT codes are broken down into many subcategories which can be found in the chart below.
| CPT Major Category | CPT Minor Category | Start Code | End Code |
| Anesthesia | head | 00100 | 00222 |
| Anesthesia | neck | 00300 | 00352 |
| Anesthesia | thorax | 00400 | 00474 |
| Anesthesia | intrathoracic | 00500 | 00580 |
| Anesthesia | spine and spinal cord | 00600 | 00670 |
| Anesthesia | upper abdomen [8] | 00700 | 00797 |
| Anesthesia | lower abdomen | 00800 | 00882 |
| Anesthesia | perineum | 00902 | 00952 |
| Anesthesia | pelvis (except hip) | 01112 | 01190 |
| Anesthesia | upper leg (except knee) | 01200 | 01274 |
| Anesthesia | knee and popliteal area | 01320 | 01444 |
| Anesthesia | lower leg (below knee) | 01462 | 01522 |
| Anesthesia | shoulder and axillary | 01610 | 01682 |
| Anesthesia | upper arm and elbow | 01710 | 01782 |
| Anesthesia | forearm, wrist and hand | 01810 | 01860 |
| Anesthesia | radiological procedures | 01916 | 01936 |
| Anesthesia | burn excisions or debridement | 01951 | 01953 |
| Anesthesia | obstetric | 01958 | 01969 |
| Anesthesia | other procedures | 01990 | 01999 |
| Surgery | general | 10000 | 10022 |
| Surgery | integumentary system | 10040 | 19499 |
| Surgery | musculoskeletal system | 20000 | 29999 |
| Surgery | respiratory system | 30000 | 32999 |
| Surgery | cardiovascular system | 33010 | 37799 |
| Surgery | hemic and lymphatic systems | 38100 | 38999 |
| Surgery | mediastinum and diaphragm | 39000 | 39599 |
| Surgery | digestive system | 40490 | 49999 |
| Surgery | urinary system | 50010 | 53899 |
| Surgery | male genital system | 54000 | 55899 |
| Surgery | reproductive system and intersex | 55920 | 55980 |
| Surgery | female genital system | 56405 | 58999 |
| Surgery | maternity care and delivery | 59000 | 59899 |
| Surgery | endocrine system | 60000 | 60699 |
| Surgery | nervous system | 61000 | 64999 |
| Surgery | eye and ocular adnexa | 65091 | 68899 |
| Surgery | auditory system | 69000 | 69979 |
| Radiology | diagnostic radiology | 70000 | 76499 |
| Radiology | diagnostic ultrasound | 76500 | 76999 |
| Radiology | radiologic guidance | 77001 | 77032 |
| Radiology | breast mammography | 77051 | 77059 |
| Radiology | bone/joint studies | 77071 | 77084 |
| Radiology | radiation oncology | 77261 | 77999 |
| Radiology | nuclear medicine | 78000 | 79999 |
| Pathology and Laboratory | organ 'Bold text'or disease-oriented panels | 80000 | 80076 |
| Pathology and Laboratory | drug testing | 80100 | 80103 |
| Pathology and Laboratory | therapeutic drug assays | 80150 | 80299 |
| Pathology and Laboratory | evocative/suppression testing | 80400 | 80440 |
| Pathology and Laboratory | consultations (clinical pathology) | 80500 | 80502 |
| Pathology and Laboratory | urinalysis | 81000 | 81099 |
| Pathology and Laboratory | chemistry | 82000 | 84999 |
| Pathology and Laboratory | hematology and coagulation | 85002 | 85999 |
| Pathology and Laboratory | immunology | 86000 | 86849 |
| Pathology and Laboratory | transfusion medicine | 86850 | 86999 |
| Pathology and Laboratory | microbiology | 87001 | 87999 |
| Pathology and Laboratory | anatomic pathology (postmortem) | 88000 | 88099 |
| Pathology and Laboratory | cytopathology | 88104 | 88199 |
| Pathology and Laboratory | cytogenetic studies | 88230 | 88299 |
| Pathology and Laboratory | surgical pathology | 88300 | 88399 |
| Pathology and Laboratory | in vivo (transcutaneous) lab procedures | 88720 | 88741 |
| Pathology and Laboratory | other procedures | 89049 | 89240 |
| Pathology and Laboratory | reproductive medicine procedures | 89250 | 89398 |
| Medicine | immune globulins, serum or recombinant prods | 90281 | 90399 |
| Medicine | immunization administration for vaccines/toxoids | 90465 | 90474 |
| Medicine | vaccines, toxoids | 90476 | 90749 |
| Medicine | psychiatry | 90801 | 90899 |
| Medicine | biofeedback | 90901 | 90911 |
| Medicine | dialysis | 90935 | 90999 |
| Medicine | gastroenterology | 91000 | 91299 |
| Medicine | ophthalmology | 92002 | 92499 |
| Medicine | special otorhinolaryngologic services | 92502 | 92700 |
| Medicine | cardiovascular | 92950 | 93799 |
| Medicine | noninvasive vascular diagnostic studies | 93875 | 93990 |
| Medicine | pulmonary | 94002 | 94799 |
| Medicine | allergy and clinical immunology | 95004 | 95199 |
| Medicine | endocrinology | 95250 | 95251 |
| Medicine | neurology and neuromuscular procedures | 95803 | 96020 |
| Medicine | central nervous system assessments/tests (neuro-cognitive, mental status, speech testing) | 96101 | 96125 |
| Medicine | health and behavior assessment/intervention | 96150 | 96155 |
| Medicine | hydration, therapeutic, prophylactic, diagnostic injections and infusions, and chemotherapy and other highly complex drug or highly complex biologic agent administration | 96360 | 96549 |
| Medicine | photodynamic therapy | 96567 | 96571 |
| Medicine | special dermatological procedures | 96900 | 96999 |
| Medicine | physical medicine and rehabilitation | 97001 | 97799 |
| Medicine | medical nutrition therapy | 97802 | 97804 |
| Medicine | acupuncture | 97810 | 97814 |
| Medicine | osteopathic manipulative treatment | 98925 | 98929 |
| Medicine | chiropractic manipulative treatment | 98940 | 98943 |
| Medicine | education and training for patient self-management | 98960 | 98962 |
| Medicine | non-face-to-face nonphysician services | 98966 | 98969 |
| Medicine | special services, procedures and reports | 99000 | 99091 |
| Anesthesia | qualifying circumstances for anesthesia | 99100 | 99140 |
| Anesthesia | moderate (conscious) sedation | 99143 | 99150 |
| Medicine | other services and procedures | 99170 | 99199 |
| Evaluation and Management | Office/other outpatient services | 99201 | 99215 |
| Evaluation and Management | Hospital observation services | 99217 | 99220 |
| Evaluation and Management | Hospital inpatient services | 99221 | 99239 |
| Evaluation and Management | Consultations | 99241 | 99255 |
| Evaluation and Management | Emergency department services | 99281 | 99288 |
| Evaluation and Management | Critical care services | 99291 | 99292 |
| Evaluation and Management | Nursing facility services | 99304 | 99318 |
| Evaluation and Management | Domiciliary, rest home (boarding home) or custodial care services | 99324 | 99337 |
| Evaluation and Management | Domiciliary, rest home (assisted living facility), or home care plan oversight services | 99339 | 99340 |
| Evaluation and Management | Home health services | 99341 | 99350 |
| Evaluation and Management | Prolonged services | 99354 | 99360 |
| Evaluation and Management | Anatomic pathology (postmortem) | 99363 | 99368 |
| Evaluation and Management | Care plan oversight services | 99374 | 99380 |
| Evaluation and Management | Preventive medicine services | 99381 | 99429 |
| Evaluation and Management | Non-face-to-face physician services | 99441 | 99444 |
| Evaluation and Management | Special evaluation and management services | 99450 | 99456 |
| Evaluation and Management | Newborn care services | 99460 | 99465 |
| Evaluation and Management | Inpatient neonatal intensive, and pediatric/neonatal critical, care services | 99466 | 99480 |
| Evaluation and Management | Complex chronic care coordination services | 99487 | 99489 |
| Evaluation and Management | Transitional care management services | 99495 | 99496 |
| Evaluation and Management | evaluation and management services | 99499 | Othe |
| Medicine | home health procedures/services | 99500 | 99602 |
| Medicine | medication therapy management services | 99605 | 99607 |