about g codes

Can you please tell me the general rules for using g codes cpts and

how to bill with medicare and the commercial insurances

about g codes

This is too broad a question for the Q&A forum. What g code, in particular, are you trying to bill? Do you have a HCPCS book? You can look at the introductory information there. Do you have a specific service you want help with?

There is introductory information in the HCPCS book. These codes are developed by Medicare. Some other commercial payers recognize and pay for some HCPCS codes. The HCPCS book also lists ambulance codes, DME, supplies, drugs, etc.

Here is a link to CMS's page on HCPCS

http://www.cms.hhs.gov/MedHCPCSGeninfo/

"G" Codes

Here's a specific G code I need some expanded information about: G0408.

G0408

Practitioners taking a detailed interval history, conducting a detailed examination, and engaging in medical decision making that is of high complexity, would bill a complex service, using HCPCS G0408 (follow-up inpatient telehealth consultation, complex). At this level of service, practitioners would typically spend 35 minutes or more communicating with the patient via telehealth. Follow-up inpatient telehealth consultations include monitoring progress, recommending management modifications, or advising on a new plan of care in response to changes in the patient’s status or no changes on the consulted health issue. Counseling and coordination of care with other providers or agencies is included as well, consistent with the nature of the problem(s) and the patient’s needs.
The physician or practitioner who furnishes the inpatient follow-up consultation via telehealth cannot be the physician of record or the attending physician, and the follow-up inpatient consultation would be distinct from the follow-up care provided by the physician of record or the attending physician. If a physician consultant has initiated treatment at an initial consultation and participates thereafter in the patient’s ongoing care management, such care would not be included in the definition of a follow-up inpatient consultation and is not appropriate for delivery via telehealth. Follow-up inpatient telehealth consultations are subject to the criteria for consultation services, as described in Pub. 100-04, chapter 12, §30.6.10.
Reference:
http://www.cms.hhs.gov/transmittals/downloads/R99BP.pdf
http://www.cms.hhs.gov/transmittals/downloads/R1654CP.pdf
http://www.cms.hhs.gov/mlnmattersarticles/downloads/mm6130.pdf