What are the billing rules for C600A?

Record start and stop times in the chart, or the fee is reduced to a lesser paying fee (A79). The 75 minutes exclude time on other separately payable services and non-patient-facing time such as reviewing charts, imaging or documentation (A79). The signed written request must be kept in the chart (a common hospital record is fine) and name the consultant or specialty, the referrer with billing number, and the patient with health number. Otherwise it pays as a lesser assessment (GP16).

What is C600A often billed with?

E082 admission assessment by the MRP (+30%) when this service is your admission assessment as MRP; once per admission, not for transfers within the hospital (GP42). K001 detention, after the first 120 minutes (GP29, GP31). C101 ICU/CCU premium for each patient seen on a visit to the ICU or CCU, unless a critical care, ventilatory or comprehensive care team fee is claimed (GP103).

Why is C600A rejected?

ARF: OHIP's message is 'Missing Physician Referring Number': a consultation needs a referring physician or nurse practitioner, so add the referrer's billing number to the claim (GP16). AT2: OHIP's message is 'Must Include Video Modality': in-patient (C-prefix) virtual services are video only, so a phone claim (K301A) is refused (AJ2).

< Billing codes

Billing code

C600A — Comprehensive Cardiology Consultation - Subject To The Same Conditions As A600

Q: What is OHIP billing code C600A?

Comprehensive cardiology consultation for a hospital in-patient: a full consultation with at least 75 minutes of direct patient contact.

Comprehensive cardiology in-patient consultation

Bill for a cardiology consultation on a hospital in-patient with at least 75 minutes of direct patient contact.

Watch for: Record start and stop times in the chart, or the fee is reduced to a lesser one.

Provider	Specialist	Assistant	Anaesthetist	Non-anaesthetist
$0.00	$342.25	$0.00	$0.00	$0.00

Code: C600A
Description: Comprehensive Cardiology Consultation - Subject To The Same Conditions As A600
FHO+ basket: Not in the FHO+ base rate basket (Schedule 2 or 2B).
Effective date: Apr 1, 2026
Termination date: No end date

Explanation

Updated October 26, 2026

Comprehensive cardiology consultation for a hospital in-patient: a full consultation with at least 75 minutes of direct patient contact.

What it covers

C600 is the in-patient version of A600, the comprehensive cardiology consultation, and has the same conditions (A80). A600 is a consultation by a cardiology specialist who provides all elements of a consultation and spends at least 75 minutes in direct contact with the patient, not counting time on other separately billable services (A79).

A consultation follows a written request from a referring physician, nurse practitioner or dental surgeon, and includes a written report back with your findings, opinions and recommendations (GP16).

Billing rules

Record start and stop times in the chart, or the fee is reduced to a lesser paying fee (A79).
The 75 minutes exclude time on other separately payable services and non-patient-facing time such as reviewing charts, imaging or documentation (A79).
The signed written request must be kept in the chart (a common hospital record is fine) and name the consultant or specialty, the referrer with billing number, and the patient with health number. Otherwise it pays as a lesser assessment (GP16).
Consultation limits: one per patient per physician per two consecutive 12-month periods for the same diagnosis; a second is allowed only for an in-patient or ED patient 12 to 24 months after the first. A clearly unrelated diagnosis allows one per 12 months. Excess claims pay as an assessment (GP17, GP18).
If you admit the patient and haven't assessed them for the same illness in the past 90 days, the admission assessment is your consultation or specific assessment; only one consultation or assessment is paid per admission when the patient is transferred to another physician in the same hospital (GP40).
Detention (K001) is payable only after 120 minutes for a comprehensive cardiology consultation (GP31).
Virtual care: video only, not phone (Appendix J, AJ2). For an in-patient, you must not be the MRP, the hospital must lack a local physician with the expertise (documented by the referrer), and the referrer must have seen the patient in person within 30 days (A69).
For emergency calls and other special visits to in-patients, bill the A-prefix General Listings with special visit premiums instead (A80, GP65–GP78).

Often billed with

E082 admission assessment by the MRP (+30%) when this service is your admission assessment as MRP; once per admission, not for transfers within the hospital (GP42).
K001 detention, after the first 120 minutes (GP29, GP31).
C101 ICU/CCU premium for each patient seen on a visit to the ICU or CCU, unless a critical care, ventilatory or comprehensive care team fee is claimed (GP103).

Common rejections

ARF: OHIP's message is 'Missing Physician Referring Number': a consultation needs a referring physician or nurse practitioner, so add the referrer's billing number to the claim (GP16).
AT2: OHIP's message is 'Must Include Video Modality': in-patient (C-prefix) virtual services are video only, so a phone claim (K301A) is refused (AJ2).

Related codes: A600, C605, C675, C606, C603, K001, E082

Source: Schedule of Benefits (July 1, 2026), Consultations and Visits, Cardiology (60), page A80; A600 conditions on A79; rules GP16–GP18, GP40.

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