Wiki HCPCS-Table of Drugs-Can anyone tell me

[Jtk625]

Hello,
Can anyone tell me in the Table of Drugs in the HCPCS book, why in the column of method of administration, some are filled in & others are blank.
Thanks for you help.
Jtk

 

[ciphermed]

See appendix I-Table of Drugs

...with a handful of exceptions, oral delivered options for most drugs are omitted from the Route of Administration column.