Claim Attending Physician Specialty Code Table 00 = Carrier wide 01 = General practice 02 = General surgery 03 = Allergy/immunology 04 = Otolaryngology 05 = Anesthesiology 06 = Cardiology 07 = Dermatology 08 = Family practice 09 = Interventional Pain Management (IPM) (eff. 4/1/2003) 10 = Gastroenterology 11 = Internal medicine 12 = Osteopathic manipulative medicine 13 = Neurology 14 = Neurosurgery 15 = Speech/language pathologist in private practice 16 = Obstetrics/gynecology 17 = Hospice and Palliative Care 18 = Ophthalmology 19 = Oral surgery (dentists only) 20 = Orthopedic surgery 21 = Cardiac Electrophysiology 22 = Pathology 23 = Sports medicine 24 = Plastic and reconstructive surgery 25 = Physical medicine and rehabilitation 26 = Psychiatry 27 = Geriatric Psychiatry 28 = Colorectal surgery (formerly proctology) 29 = Pulmonary disease 30 = Diagnostic radiology 31 = Intensive cardiac rehabilitation 32 = Anesthesiologist Assistant (eff. 4/1/2003 — previously grouped with Certified Registered Nurse Anesthetists (CRNA)) 33 = Thoracic surgery 34 = Urology 35 = Chiropractic 36 = Nuclear medicine 37 = Pediatric medicine 38 = Geriatric medicine 39 = Nephrology 40 = Hand surgery 41 = Optometry 42 = Certified nurse midwife 43 = Certified Registered Nurse Anesthetist (CRNA) (Anesthesiologist Assistants were removed from this specialty 4/1/2003) 44 = Infectious disease 45 = Mammography screening center 46 = Endocrinology 47 = Independent Diagnostic Testing Facility (IDTF) 48 = Podiatry 49 = Ambulatory surgical center (formerly miscellaneous) 50 = Nurse practitioner 51 = Medical supply company with certified orthotist (certified by American Board for Certification in Prosthetics and Orthotics) 52 = Medical supply company with certified prosthetist (certified by American Board for Certification in Prosthetics and Orthotics) 53 = Medical supply company with certified prosthetist-orthotist (certified by American Board for Certification in Prosthetics and Orthotics) 54 = Medical supply company for DMERC (and not included in 51–53) 55 = Individual certified orthotic personnel certified by an accrediting organization 56 = Individual certified prosthetic personnel certified by an accrediting organization 57 = Individual certified prostheticorthotic personnel certified by an accrediting organization 58 = Medical supply company with registered pharmacist 59 = Ambulance service (private) 60 = Public health or welfare agencies (federal, state, and local) 61 = Voluntary health or charitable agencies (e.g., National Cancer Society, National Heart Association, Catholic Charities) 62 = Psychologist (billing independently) 63 = Portable X-ray supplier (billing independently) 64 = Audiologist (billing independently) 65 = Physical therapist in private practice 66 = Rheumatology 67 = Occupational therapist in private practice 68 = Clinical psychologist 69 = Clinical laboratory (billing independently) 70 = Single or Multispecialty clinic or group practice (PA Group) 71 = Registered Dietician/Nutrition Professional (eff. 1/1/2002) 72 = Pain Management (eff. 1/1/2002) 73 = Mass Immunization Roster Biller 74 = Radiation Therapy Centers (prior to 4/2003 this included Independent Diagnostic Testing Facilities (IDTF) 75 = Slide Preparation Facilities (added to differentiate them from Independent Diagnostic Testing Facilities (IDTFs — eff. 4/1/2003) 76 = Peripheral vascular disease 77 = Vascular surgery 78 = Cardiac surgery 79 = Addiction medicine 80 = Licensed clinical social worker 81 = Critical care (intensivists) 82 = Hematology 83 = Hematology/oncology 84 = Preventive medicine 85 = Maxillofacial surgery 86 = Neuropsychiatry 87 = All other suppliers (e.g., drug stores) 88 = Unknown provider 89 = Certified clinical nurse specialist 90 = Medical oncology 91 = Surgical oncology 92 = Radiation oncology 93 = Emergency medicine 94 = Interventional radiology 95 = Competitive Acquisition Program (CAP) Vendor (eff. 07/2001/2006). Prior to 07/2001/2006, known as Independent physiological laboratory 96 = Optician 97 = Physician assistant 98 = Gynecological/oncology 99 = Unknown physician specialty A0 = Hospital (DMERCs only) A1 = Skilled Nursing Facility (DMERCs only) A2 = Intermediate care nursing facility (DMERCs only) A3 = Nursing facility, other (DMERCs only) A4 = Home Health Agency (DMERCs only) A5 = Pharmacy (DMERC) A6 = Medical supply company with respiratory therapist (DMERCs only) A7 = Department store (DMERC) A8 = Grocery store (DMERC) A9 = Indian Health Service (IHS), tribe and tribal organizations (non-hospital or non-hospitalbased facilities, eff. 1/2005) B1 = Supplier of oxygen and/or oxygen related equipment (eff. 10/2/2007) B2 = Pedorthic Personnel (eff. 10/2/2007) B3 = Medical Supply Company with pedorthic personnel (eff. 10/2/2007) B4 = Does not meet definition of health care provider (e.g., Rehabilitation agency, organ procurement organizations, histocompatibility labs) (eff. 10/2/2007) B5 = Ocularist C0 = Sleep medicine C1 = Centralized flu C2 = Indirect payment procedure C3 = Interventional cardiology C5 = Dentist (eff. 7/2016) C6 = Hospitalist C7 = Advanced heart failure and transplant cardiology C8 = Medical toxicology C9 = Hematopoietic cell transplantation and cellular therapy D3 = Medical genetics and genomics D4 = Undersea and Hyperbaric Medicine D5 = Opioid Treatment Program (eff. 1/2020) D7 = Micrographic Dermatologic Surgery (MDS) (effective October 1, 2020)