Telemedicine vs telehealth vs virtual care: which rules apply to your product?
People use telemedicine, telehealth and virtual care as synonyms, but federal rules do not. Each term that is defined comes with its own conditions, and virtual care is not defined at all. For a product team the useful question is which rule governs each feature you plan to ship.
What is the difference between telemedicine and telehealth?
Quick answer
Telemedicine vs telehealth is mostly a question of which rule you are reading: federal drug law defines the practice of telemedicine for controlled substance prescribing, while Medicare defines telehealth services in 42 CFR 410.78. Virtual care has no regulatory definition. Agnotic Technologies maps each product feature to the rule that governs it.
| Criterion | Telemedicine | Telehealth |
|---|---|---|
| Where the term is defined | 21 U.S.C. 802(54), the practice of telemedicine, for controlled substances | 42 CFR 410.78, Medicare telehealth services |
| What the definition governs | When remote prescribing of controlled substances fits the Act's telemedicine provisions | When Medicare Part B pays for a service on the telehealth list |
| Live video visit | Telemedicine in the clinical sense | Telehealth when the service is on the list and uses two-way, real-time audio and video |
| Audio-only visit | Not a separate category in the definition | Allowed for a patient at home who cannot use or does not consent to video; modifier 93 (FQ for RHCs and FQHCs) |
| Store and forward (photos, files) | Not addressed | Originating sites limited to Federal telemedicine demonstration programs in Alaska or Hawaii |
| Patient portal messaging | Not addressed | Not a telehealth service; billed, where it qualifies, under separate online digital evaluation and management codes |
| Remote monitoring | Not addressed | Not a telehealth service; paid under its own remote monitoring codes |
| Controlled substance prescribing after a remote visit | In-person evaluation required, subject to exceptions; COVID-19 flexibilities extended through December 31, 2026 | Not governed by 42 CFR 410.78 |
| Practitioner licensure | DEA registration rules apply to the prescriber | The distant site practitioner must be licensed to furnish the service under State law |
| Virtual care | Not a defined term | Not a defined term; use it as the product umbrella and map each feature to a rule |
What they are
What is Telemedicine
In everyday use, telemedicine means clinical care delivered at a distance. In federal law the defined term is the practice of telemedicine in 21 U.S.C. 802(54), which sets when a remote practitioner's prescribing of controlled substances falls under the Controlled Substances Act's telemedicine provisions.
What is Telehealth
Telehealth is the broader everyday term, covering clinical visits plus education, monitoring and administration. In Medicare, telehealth services are a defined list paid under 42 CFR 410.78 when furnished through an interactive telecommunications system and the conditions in that section are met.
Key differences
What counts as Medicare telehealth?
42 CFR 410.78(a)(3) defines an interactive telecommunications system as, at a minimum, audio and video equipment permitting two-way, real-time communication between the patient and the distant site practitioner. Audio-only is allowed for a patient at home when the practitioner can use video but the patient cannot or does not consent, with CPT modifier 93, or modifier FQ for rural health clinics and federally qualified health centers. Your visit record needs to capture which applied.
Why does asynchronous messaging sit outside telehealth?
The same section defines asynchronous store and forward as sending a patient's medical information to a distant practitioner who reviews it without the patient present, and limits store and forward originating sites to Federal telemedicine demonstration programs in Alaska or Hawaii. Portal messages, photo uploads and questionnaires are useful features, but outside those programs they are not Medicare telehealth; they are billed, if at all, under other code families.
What does telemedicine mean for prescribing?
Under the Ryan Haight Act, a practitioner may prescribe controlled substances remotely only after at least one in-person medical evaluation, subject to exceptions; 21 U.S.C. 802(54) defines the practice of telemedicine for those exceptions. DEA and HHS issued a fourth temporary extension of the COVID-19 telemedicine flexibilities, effective through December 31, 2026. Build the prescribing flow so the rule set can change on a date without a release.
Where does virtual care fit?
Virtual care, and telemedicine software in the product sense, are commercial terms. Neither the Medicare telehealth regulation nor the Controlled Substances Act defines virtual care. That makes it a good name for a product that combines visits, messaging and monitoring, as long as each feature inside it is mapped to the rule that actually governs it.
When to use each
When to use Telemedicine
- You are describing remote clinical visits: diagnosis, treatment and follow-up.
- Your product supports prescribing, and controlled substances may be involved.
- You are reading DEA rules or the Ryan Haight Act provisions for remote prescribing.
When to use Telehealth
- You bill Medicare for visits furnished by video, or by audio only where allowed.
- You describe the whole remote program: visits, messaging, monitoring and education.
- You are checking Medicare originating site, distant site and practitioner rules.
How do you map each feature to its rule before you build?
1. List the features, not the label. Scheduled video, audio-only fallback, messaging, photo upload, device readings, e-prescribing and group sessions each get their own row.
2. For each feature, name the payer and the rule. Medicare visits go to 42 CFR 410.78; remote monitoring to its own codes; controlled substance prescribing to DEA rules; commercial and Medicaid payers to their own policies.
3. Capture the facts each rule asks for at the moment they happen: modality used, the reason video was not used, the patient's location, the practitioner's licences and whether an in-person evaluation is on record.
4. Keep rules as configuration with effective dates, so a changed flexibility or a new telehealth list is a data change, not a code change.
5. Review the map each year against the new Physician Fee Schedule and any DEA rule, and update the product before the effective date. For the platform build itself, see our telemedicine platform development service.