Telehealth is now ordinary practice for most specialties, but the billing rules never fully settled and they are not uniform across payers. Errors concentrate in three places, and all three are exactly what an auditor examines first.
Place of service is the largest single error
Place of service codes distinguish telehealth delivered to a patient in their home from telehealth delivered to a patient at another site. The distinction is not cosmetic: it can change whether the service pays at the facility or non-facility rate, which changes the amount you are paid for identical work.
The common failure is a default place of service configured once in the practice management system and applied to every telehealth encounter regardless of where the patient actually was. That produces a consistent, systematic error across every claim, which is the kind auditors find easily and extrapolate from.
Modifiers carry meaning, not decoration
- Audio-only encounters are distinguished from audio-video encounters by modifier, and some payers cover one and not the other. Appending the wrong one either misrepresents the service or triggers a denial.
- Some payers require a telehealth modifier in addition to the place of service code, some treat that as a duplicate, and some have changed their position. This is payer-specific and worth maintaining as a matrix.
- Behavioural health telehealth frequently carries its own modifier and policy requirements distinct from medical telehealth.
What the documentation has to show
The clinical standard for a telehealth encounter is the same as for the equivalent in-person service. The additional burden is evidentiary: the note must establish that the encounter happened as billed.
- The modality actually used, stated explicitly, including whether video was established or the encounter was audio-only.
- Patient location at the time of service, which supports the place of service code.
- Provider location where the payer requires it.
- Patient consent to receive care by telehealth, obtained per that payer's requirement.
- Start and end times where the code is time-based, which most telehealth evaluation and management billing is.
- If video was attempted and failed, that fact and the decision to continue audio-only. Retro-fitting this after a denial is not credible.
Where the audit risk concentrates
- Uniform time entries. Every encounter documented at exactly the same duration is a well-known pattern and invites scrutiny.
- Level of service inconsistent with modality. High-complexity billing on brief audio-only encounters requires documentation that genuinely supports it.
- Consent not recorded. Straightforward to fix in advance, difficult to remedy afterwards.
- Place of service applied by default rather than by fact, as above. The systematic nature is what makes it expensive.
Remote monitoring is a separate discipline
Remote patient monitoring, chronic care management and principal care management are recurring monthly services with their own requirements around device data days, minimum interactive time and consent. They are frequently conflated with telehealth in practice and are governed differently. If you bill them, they deserve their own workflow and their own audit review rather than being folded into telehealth.