Includes
Hematologists and Oncologists (both MD’s and DO’s) and physician assistants that specialize in hematology and/or oncology for adults and children.

Excludes
Advanced Practice Registered Nurses, Clinical Nurse Specialists, Registered Nurses, Licensed Practical/Vocational Nurses, Nursing/ Medical Assistants (all fall under Q401-Nursing), Family & Internal Medicine Services (Q509), Pediatric Medicine (Q516), Surgical Oncologists (Q523 Surgery), Pediatric Surgical Oncologists (Q523), Radiation Oncology (Q522 Radiology).

Possible NAICS Codes
621991 – Blood and Organ Banks
561320 – Temporary Help Services
325413 – In-Vitro Diagnostic Substance Manufacturing
334516 – Analytical Laboratory Instrument Manufacturing
611310 – Colleges, Universities, and Professional Schools
621492 – Kidney Dialysis Centers
621511 – Medical Laboratories
622110 – General Medical and Surgical Hospitals
621111 – Offices of Physicians (except Mental Health Specialists)
813920 – Professional Organizations