so that the carrier can call the physician in case there are any questions about this claim. Unfortunately, because of all the red tape with oxygen claims, there usually are questions.

GX0 fields 31 - 34, positions 291 - 310, are the four diagnosis codes. These are the diagnosis codes related to what the patient needs oxygen and not to any procedures that were done to the patient

There is a big misconception about medical billing and the people who do the billing. The layman thinks that these people have no special skills and are just your everyday run of the mill office person. This couldn't be further from the truth. A medical biller needs to be extremely sharp with all the rules and regulations attached to medical billing. And when it comes to billing oxygen claims, it is even more critical that the biller be on the top of his game. In this installment on medical billing and the electronic transmission of claims using NSF 3.01 specifications, we're going to continue with our review of one of the most complex CMNs in medical billing, the oxygen CMN, or GX0 record. We pick up our review with field number 28.

GX0 field 28, positions 263 - 265, is the portable oxygen flow rate. This field only applies to a patient who has been given a portable oxygen device. This field tells the carrier what the oxygen flow rate is, in liters per minute, for a portable oxygen system. If this is entered, the therapeutic purpose of this device must be explained if the patient cannot get the same benefit from a non portable system. This must be entered in the GX1 record in field number 6.

GX0 field 29, positions 266 - 280, is the ordering physician ID. This is the ID number of the physician who ordered the patient to be put on oxygen.

GX0 field 30, positions 281 - 290, is the ordering provider phone number. This tells the carrier the phone number of the physician who prescribed the oxygen. This is required so that the carrier can call the physician in case there are any questions about this claim. Unfortunately, because of all the red tape with oxygen claims, there usually are questions.

GX0 fields 31 - 34, positions 291 - 310, are the four diagnosis codes. These are the diagnosis codes related to what the patient needs oxygen and not to any procedures that were done to the patient f

n claims, it is even more critical that the biller be on the top of his game. In this installment on medical billing and the electronic transmission of claims using NSF 3.01 specifications, we're going to continue with our review of one of the most complex CMNs in medical billing, the oxygen CMN, or GX0 record. We pick up our review with field number 28.

GX0 field 28, positions 263 - 265, is the portable oxygen flow rate. This field only applies to a patient who has been given a portable oxygen device. This field tells the carrier what the oxygen flow rate is, in liters per minute, for a portable oxygen system. If this is entered, the therapeutic purpose of this device must be explained if the patient cannot get the same benefit from a non portable system. This must be entered in the GX1 record in field number 6.

GX0 field 29, positions 266 - 280, is the ordering physician ID. This is the ID number of the physician who ordered the patient to be put on oxygen.

GX0 field 30, positions 281 - 290, is the ordering provider phone number. This tells the carrier the phone number of the physician who prescribed the oxygen. This is required so that the carrier can call the physician in case there are any questions about this claim. Unfortunately, because of all the red tape with oxygen claims, there usually are questions.

GX0 fields 31 - 34, positions 291 - 310, are the four diagnosis codes. These are the diagnosis codes related to what the patient needs oxygen and not to any procedures that were done to the patient

- 265, is the portable oxygen flow rate. This field only applies to a patient who has been given a portable oxygen device. This field tells the carrier what the oxygen flow rate is, in liters per minute, for a portable oxygen system. If this is entered, the therapeutic purpose of this device must be explained if the patient cannot get the same benefit from a non portable system. This must be entered in the GX1 record in field number 6.

GX0 field 29, positions 266 - 280, is the ordering physician ID. This is the ID number of the physician who ordered the patient to be put on oxygen.

GX0 field 30, positions 281 - 290, is the ordering provider phone number. This tells the carrier the phone number of the physician who prescribed the oxygen. This is required so that the carrier can call the physician in case there are any questions about this claim. Unfortunately, because of all the red tape with oxygen claims, there usually are questions.

GX0 fields 31 - 34, positions 291 - 310, are the four diagnosis codes. These are the diagnosis codes related to what the patient needs oxygen and not to any procedures that were done to the patient

must be entered in the GX1 record in field number 6.

GX0 field 29, positions 266 - 280, is the ordering physician ID. This is the ID number of the physician who ordered the patient to be put on oxygen.

GX0 field 30, positions 281 - 290, is the ordering provider phone number. This tells the carrier the phone number of the physician who prescribed the oxygen. This is required so that the carrier can call the physician in case there are any questions about this claim. Unfortunately, because of all the red tape with oxygen claims, there usually are questions.

GX0 fields 31 - 34, positions 291 - 310, are the four diagnosis codes. These are the diagnosis codes related to what the patient needs oxygen and not to any procedures that were done to the patient

so that the carrier can call the physician in case there are any questions about this claim. Unfortunately, because of all the red tape with oxygen claims, there usually are questions.

GX0 fields 31 - 34, positions 291 - 310, are the four diagnosis codes. These are the diagnosis codes related to what the patient needs oxygen and not to any procedures that were done to the patient for this claim. Those codes are included in the FA0 record. Currently, these are ICD-9 codes. ICD-10 codes are out but not yet used for this CMN.

GX0 field 35, position 311, is the certification on file indicator. This field tells the carrier that the actual paper CMN is on file with the doctor and signed by all parties. This does not have to be done at the sending of the claim. but eventually there better be a CMN on file. The valid responses are Y or N.

GX0 field 36, position 312, is the delivery system type. This is a one character code that tells the carrier what type of delivery system the patient has for getting the oxygen. Valid responses are A for nasal canula, B for O2 conserving device, C for O2 conserving device with pulse O2 system, D for O2 conserving device with reservoir system and E for a catheter.

GX0 field 37, positions 313 - 320, is filler national and must be filled with spaces.

This concludes our review of the GX0 record.