Telehealth Services: Access, Coverage, and Patient Use in the US

Telehealth encompasses a broad range of health services delivered through electronic communications technology, including video conferencing, remote patient monitoring, and asynchronous data transmission. Federal agencies and state regulators have established distinct coverage rules, licensure requirements, and reimbursement frameworks that govern how and when these services apply. Understanding these frameworks matters because coverage eligibility, geographic restrictions, and permissible service types vary substantially depending on payer type, clinical context, and applicable federal or state law. This page covers the definitional scope of telehealth, how encounters are structured and reimbursed, common clinical scenarios, and the boundaries that determine when telehealth is and is not appropriate.

Definition and scope

Telehealth is defined by the Health Resources and Services Administration (HRSA) as the use of electronic information and telecommunications technologies to support and promote long-distance clinical health care, patient and professional health-related education, public health, and health administration (HRSA Telehealth). This definition is intentionally broad and encompasses services that range from real-time video visits to store-and-forward image transmission used in dermatology and radiology.

Federal statute draws a narrower operational category: telemedicine, which refers specifically to clinical services delivered in real time across an interactive two-way audio/video connection. The Centers for Medicare and Medicaid Services (CMS) uses this term in its reimbursement rules under 42 CFR Part 410 (CMS Telehealth Services).

Three primary modality types structure the regulatory and reimbursement landscape:

1. Synchronous telehealth — Real-time, two-way audio/video interaction between a patient and a licensed clinician. This is the dominant format for Medicare-covered telehealth encounters.
2. Asynchronous (store-and-forward) — Clinical data, images, or recordings transmitted for later review by a specialist. CMS covers this modality only in federal demonstration programs and for federally qualified health centers operating in Alaska and Hawaii.
3. Remote Patient Monitoring (RPM) — Continuous or periodic collection of physiologic data (blood pressure, glucose, weight) via digital devices for clinician review. CMS reimburses RPM under distinct billing codes, including CPT codes 99453, 99454, and 99457.

The Federal Communications Commission (FCC) maintains a separate framework—the Connected Care Pilot Program—that funds broadband infrastructure enabling telehealth delivery in underserved areas, distinct from the clinical coverage rules administered by CMS (FCC Connected Care).

How it works

A telehealth encounter follows a structured process that parallels in-person care in documentation and billing requirements, though the delivery mechanism differs. The sequence below reflects CMS and general industry practice:

1. Eligibility verification — The patient's insurance plan is checked for telehealth benefit coverage, including any applicable prior authorization process requirements specific to telehealth claims.
2. Platform selection — The provider uses a HIPAA-compliant video platform. The Department of Health and Human Services Office for Civil Rights (HHS OCR) issued enforcement discretion guidance during the COVID-19 public health emergency permitting non-HIPAA-compliant platforms temporarily, but standard operations require platforms that execute a Business Associate Agreement (HHS OCR Telehealth Privacy).
3. Informed consent — Clinicians obtain and document patient consent for telehealth delivery, a requirement codified in the laws of 38 states as of the most recent National Conference of State Legislatures (NCSL) survey (NCSL Telehealth Policy).
4. Clinical encounter and documentation — The provider conducts the visit and documents it under the same CPT or HCPCS coding standards as an in-person visit. Medicare requires that the originating site (patient location) and distant site (provider location) meet statutory criteria under 42 U.S.C. § 1395m(m).
5. Claim submission and reimbursement — Claims include the telehealth place-of-service code (POS 02 for telehealth provided other than in the patient's home; POS 10 for home-based telehealth, effective 2022). The modifier GT or 95 may apply depending on payer rules.

Health insurance coverage types and payer-specific plan rules determine reimbursement rates, as private payer telehealth mandates differ across states. The explanation of benefits (EOB) guide provides the framework for interpreting post-visit cost documentation.

Common scenarios

Telehealth applies across a defined range of clinical and administrative contexts. The following represent well-established, covered use patterns:

• Primary care and chronic disease management — Established patients with conditions such as hypertension or type 2 diabetes use video visits for medication management and lab review without traveling to a facility. This intersects directly with chronic disease management programs covered under Medicare Advantage and commercial plans.
• Mental and behavioral health services — Mental health services delivered via telehealth represent the largest category of telehealth utilization by volume. CMS permanently expanded mental health telehealth access under the Consolidated Appropriations Act of 2023, removing the geographic originating site restriction for mental health visits (CMS CAA 2023 Telehealth Summary). See also mental health services access.
• Specialist consultations — A primary care physician in a rural area initiates an e-consult with a cardiologist at a distant site. The specialist referral process may be required by the payer before the telehealth specialist claim is approved.
• Post-acute follow-up — Providers use video visits to monitor patients discharged from hospital settings, reducing readmission risk. This supports transitions in post-acute care options.
• Prescription renewal and medication management — Controlled substance prescribing via telehealth remains subject to the Ryan Haight Online Pharmacy Consumer Protection Act (21 U.S.C. § 831), which requires an in-person medical evaluation before prescribing Schedule II–V controlled substances via telemedicine, with narrow exceptions administered by the DEA.

Decision boundaries

Not all clinical situations fall within the appropriate scope of telehealth. Regulatory, clinical, and technical constraints define where telehealth ends and in-person care must begin.

Telehealth is generally appropriate when:
- The clinical assessment does not require physical examination findings that cannot be observed via video (e.g., auscultation, palpation)
- The patient has a stable internet connection and a device capable of supporting real-time video
- The patient's condition does not represent an emergency requiring immediate intervention (contrast with urgent care vs emergency room decision criteria)
- The provider holds an active license in the state where the patient is physically located at the time of the encounter — a cross-state requirement enforced by state medical boards

Telehealth is not appropriate and in-person care is required when:
- Diagnostic imaging, laboratory specimen collection, or physical procedures are necessary
- The patient presents with acute symptoms consistent with a medical emergency
- State law or payer contract prohibits coverage for the specific service via telehealth

Coverage contrast — Medicare vs. Medicaid:

Medicare Parts A, B, C, and D each carry distinct telehealth coverage implications. Medicaid eligibility and enrollment rules affect which telehealth services a Medicaid beneficiary can access, as coverage varies by state and managed care contract.

Patient privacy during telehealth encounters is governed by HIPAA, specifically the Security Rule at 45 CFR Part 164, which mandates administrative, physical, and technical safeguards for electronic protected health information. For a full treatment of those rights, see HIPAA patient privacy rights.

References

• Health Resources and Services Administration (HRSA) — Telehealth
• Centers for Medicare and Medicaid Services (CMS) — Telehealth Services
• CMS Consolidated Appropriations Act 2023 Telehealth Fact Sheet
• HHS Office for Civil Rights — Telehealth and HIPAA
• Federal Communications Commission (FCC) — Connected Care Pilot Program
• National Conference of State Legislatures (NCSL) — Telehealth Policy
• [42 CFR Part 410 — Supplementary Medical Insurance Benefits](https://www.