Contact Chattanooga Medcomm


MedComm Radio Channels 

Routing Channels
TN State EMS - 155.205 Mhz
Med Com 1 - TVRS 800 Talk Group 

Patient Report
H.E.A.R. Frequency - 155.340 Mhz
Individual Hospital 800 Talk Groups 

Initially, the MedComm routing channel for all incoming radio traffic will be the Tennessee State EMS frequency, (155.205 Mhz). Radio traffic will be routed to the H.E.A.R. System, (155.340Mhz). MedComm also operates on the Hamilton County 800 system. Several agencies utilize Med Com 1 for routing and is assigned to the appropriate hospital talk group.


Phone Access

As a secondary access route, phone access is available at 423-778-9633. This line is monitored and recorded for your further assistance and quality assurance.


Call-In Radio Information


When accessing Chattanooga MedComm, use clear text language in place of "ten-codes" in radio transmissions. Ambulances transporting patient(s) to any of the previously listed Chattanooga area hospitals are asked to call-in on the designated routing channel (155.205) with the following: 
  • Unit ID 
  • Destination Hospital 
  • Type / Priority Traffic 
  • If Physician orders are needed 
If the assigned frequency for the destination hospital is clear, the unit will be routed to that frequency and the patient report will be monitored until the unit clears the frequency. If the frequency for the destination hospital is not clear, MedComm will ask the requesting unit to standby on the routing channel until the frequency is clear. MedComm will ask the unit of its ETA to the destination hospital. To minimize ambulance to hospital radio transmission air time, a brief, but concise, radio report format is as follows:


Radio Report Format


The following is a recommended format for radio reporting of patient status. The radio report is designed to allow triage decisions to be made or to request orders beyond the protocol. Radio reports will be abbreviated to the following pertinent pieces of information. The radio report should be given in approximately 30 seconds or less. The concept is to maximize the report to essential conversation in reporting patient status and reduce air time use on the radio frequency. 

  1. Ambulance unit number 
  2. Name of Technician (if requesting orders) 
  3. Patient's age / sex 
  4. Chief complaint or mechanism of injury 
  5. Most recent vital signs if not within normal limits 
  6. Only pertinent history that will affect triage status 
  7. Estimated time of arrival 
Information not to be included in normal radio reporting: 
  • Sequential sets of vital signs if vital signs are stable 
  • Entire medical history 
  • Allergies (unless to a medication that orders are given for)
  • Treatments provided 
  • Omit the patient's name

Communications to request essential medical orders beyond protocols is allowed. If physician orders are needed, or is there is a problem in contact with the destination hospital after the unit is routed, MedComm will contact the destination hospital Emergency Department by phone and advise of the units request. The MedComm Coordinator will CAD the following: 
  • Date / Time of request 
  • Unit ID Destination hospital 
  • Chief Compliant/MOI 
  • If there were MD orders given, which physician 
This data will be maintained in MedComm and is accessible to any agency needing this information through written request from the agency's administration.