Page History

20

External beam, NOS     

The treatment is known to be by external beam, but there is insufficient information to determine the specific modality.

21

Orthovoltage                            

External beam therapy administered using equipment with a maximum energy of less than one (1) million volts (MV). Orthovoltage energies are typically expressed in units of kilovolts (kV).

22

Cobalt-60, Cesium-137

External beam therapy using a machine containing either a Cobalt-60 or Cesium-137 source. Intracavitary use of these sources is coded either 50 or 51.

23

Photons (2-5 MV)                    

External beam therapy using a photon producing machine with a beam energy in the range of 2-5 MV.

24

Photons (6-10 MV)                 

External beam therapy using a photon producing machine with a beam energy in the range of 6-10 MV.

25

Photons (11-19 MV)               

External beam therapy using a photon producing machine with a beam energy in the range of 11-19 MV.

26

Photons (>19 MV)                  

External beam therapy using a photon producing machine with a beam energy of more than 19 MV.

27

Photons (mixed energies)          

External beam therapy using more than one energy over the course of treatment.

28

Electrons                                 

Treatment delivered by electron beam.

29

Photons and electrons mixed

Treatment delivered using a combination of photon and electron beams.

30

Neutrons, with or without photons/electrons

Treatment delivered using neutron beam.

31

IMRT                                      

Intensity modulated radiation therapy, an external beam technique that should be clearly stated in patient record.

32

Conformal or 3-D therapy        

An external beam technique using multiple, fixed portals shaped to conform to a defined target volume. Should be clearly described as conformal or 3-D therapy in patient record.

40

Protons

Treatment delivered using proton therapy.

41

Stereotactic radiosurgery, NOS

Treatment delivered using stereotactic radiosurgery, type not specified in patient record.

42

   Linac Linac radiosurgery

Treatment categorized as using stereotactic technique delivered with a linear accelerator.

43

Gamma Knife

Treatment categorized as using stereotactic technique delivered using a Gamma Knife machine.

50

Brachytherapy, NOS

Brachytherapy, interstitial implants, molds, seeds, needles, or intracavitary applicators of radioactive materials not otherwise specified.  Includes radioembolization.

51

Brachytherapy, Intracavity, LDR

Intracavitary (no direct insertion into tissues) radio-isotope treatment using low dose rate applicators and isotopes (Cesium-137, Fletcher applicator).

52

Brachytherapy, Intracavity, HDR

Intracavitary (no direct insertion into tissues) radio-isotope treatment using high dose rate after-loading applicators and isotopes.

53

Brachytherapy, Interstitial, LDR

Interstitial (direct insertion into tissues) radioisotope treatment using low dose rate sources.

54

Brachytherapy, Interstitial, HDR

Interstitial (direct insertion into tissues) radioisotope treatment using high dose rate sources.

55

Radium

Infrequently used for low dose rate (LDR) interstitial and intracavitary therapy.

60

Radioisotopes, NOD 

Iodine-131, Phosphorus-32, etc.

61

Strontium-89  

Treatment primarily by intravenous routes for bone metastases.

62

Strontium-90 

98

Other, NOS

Radiation therapy administered, but the treatment modality is not specified or is unknown.

99

Unknown

It is unknown whether radiation therapy was administered.