Patient discharge from hospital than admitted to a nursing home, patient is seeing by different Doctors. Dr. A is his primary and Dr.B and C goes and follow up with the patient at the nursing home. Nurse is bringing patient to the office for future appointment to see a specilist for a special test, but still his has not been seen by his Primary Dr.A. Patient has not been seen by his primary for 3 monts, but yes by Dr. B and C. Can I bill diagnosis for the services that other Doctors diagnosed? and can Dr. A bill for dx from hospital D/C with out seen patient?