2021 E/M coding: Review guidance for reporting time-based visit services

Why This Topic Matters

Accurate time-based E/M reporting can affect claim selection, compliance, and reimbursement for office and outpatient services. The article helps readers understand where guidance sources may conflict and why those differences matter for real-world coding workflows.

Article Sections

1. Overview of the 2021 E/M update

   Introduces the major outpatient E/M changes taking effect in 2021 and explains the shift toward time-based reporting or medical decision-making. It also notes the relationship between AMA guidance and payer interpretation.

2. Time

   Discusses how total time is defined for office and outpatient E/M services and what types of work are counted on the date of the encounter. It also addresses common misunderstandings about timing language used in valuation guidance.

3. Prolonged service add-on code 99417

   Reviews the new CPT add-on service tied to prolonged office or outpatient visits and describes the surrounding CMS response and related Medicare guidance. The section also covers the general timing framework for when prolonged service reporting becomes relevant.

4. Prolonged services without patient contact

   Explores non-face-to-face prolonged service reporting and the interaction between office visit reporting and separate prolonged service codes. It also summarizes conflicting guidance from CPT and Medicare contractors and discusses how that affects reporting considerations.