1What Is the C153 OHIP Code?
The C153 billing code applies to medical specific assessments performed by endocrinologists for non-emergency hospital in-patient services in Ontario. This assessment must provide a full history of the patient's presenting complaint and a thorough examination of the concerned system or region to aid in diagnosis or function evaluation.
In endocrinology, C153 assessments are often used for patients with complex conditions such as hyponatraemia, steroid dependence, or specific glycemic challenges, typically conducted on hospital wards. Accurate documentation and understanding of billing frequency restrictions are essential to avoid underbilling or missed opportunities for proper compensation.
Missed billing opportunities often stem from the misinterpretation of the eligibility criteria or neglecting to document the duration of service. Ensure all documentation reflects the detailed clinical work performed.
2Related Codes
| Code | Name | Frequency | Description |
|---|---|---|---|
| A153 | Medical specific assessment | Same conditions as C153 but applicable outside hospital in-patient settings | For use of similar services in outpatient settings. |
| W154 | General re-assessment of patient in nursing home | Subject to Nursing Homes Act | Re-assessment for patients residing in nursing homes. |
| A151 | Complex medical specific re-assessment | Subject to multiple re-assessment conditions | For complex cases demanding comprehensive re-assessment. |
| A154 | Medical specific re-assessment | Applicable after initial specific assessment conditions are met | For re-assessment following an initial specific assessment. |
3Eligibility Requirements
Eligibility Requirements
- Setting: This code is applicable only for non-emergency hospital in-patient services listed under the Endocrinology & Metabolism category.
- Frequency: Medical specific assessments are limited to one per patient per physician per 12-month period. A second assessment is permitted if a different, unrelated diagnosis is made, or if 90 days have passed and the second assessment is a hospital admission assessment.
- Virtual Delivery: Eligible for virtual care but only via video (C153A format), not telephone.
- Documentation: The start and end time of the assessment must be recorded in the patient's permanent medical record to be eligible for payment.
See further details on billing rules in the OHIP General Preamble GP23 and related sections.
4What Your Clinical Note Must Show
Essential for payment eligibility. Complete entries required on medical records.
- Exact start and end time of the assessment.
- Location of the assessment (hospital in-patient setting).
- Detailed history and examination findings.
5Weak vs. Strong Note Examples
The strong note succeeds because it provides a detailed clinical context and specific actions taken, which captures the essence of a medical specific assessment, whereas the weak note lacks sufficient detail to reflect the service's complexity.
Hyponatraemia assessed. No further details.
Comprehensive assessment performed for a patient admitted with hyponatraemia.
Detailed history: Onset, medication history including steroids, and comorbid conditions were reviewed.
Physical examination focused on potential endocrine causes.
- Blood pressure and glucose levels charted.
- Consultation with nephrology recommended for further evaluation.
