Telehealth and Virtual Care in the United States

Telehealth has reshaped how Americans interact with the healthcare system — not gradually, but in a compressed burst that caught most institutions mid-stride. This page covers what telehealth actually is, how the technology and workflow function in practice, where it fits most naturally into a person's care, and where its limitations become clinically meaningful. The stakes are real: access, cost, and continuity of care all turn on whether telehealth is used well or used as a convenient substitute for something it cannot replace.

Definition and scope

Telehealth is the delivery of health-related services and information through electronic and telecommunications technologies. The Health Resources and Services Administration (HRSA) distinguishes telehealth as the broader category — covering clinical services, provider education, health administration, and patient monitoring — from telemedicine, which refers specifically to clinical care delivered remotely.

The practical scope is wide. Telehealth encompasses synchronous video visits between patients and clinicians, asynchronous "store-and-forward" consultations (where images or data are sent for later review), remote patient monitoring (RPM) devices that transmit vitals in real time, and mobile health applications. The Centers for Medicare & Medicaid Services (CMS) maintains specific billing categories for each of these modalities, and those categories carry distinct reimbursement rules.

Scale matters here. By 2022, HRSA reported that telehealth was being used in every state and across every care setting — from federally qualified health centers to academic medical systems. The expansion was formalized through waivers under the Public Health Emergency, some of which were later codified through the Consolidated Appropriations Act of 2023, which extended many Medicare telehealth flexibilities through December 2024.

For anyone navigating the broader landscape of how and where Americans receive care, telehealth sits within a larger ecosystem — one mapped across nationalhealthcareauthority.com alongside coverage, access, and system design.

How it works

A telehealth encounter follows a recognizable clinical logic, even when the medium is a smartphone screen.

Synchronous video visits work through HIPAA-compliant platforms — not general video conferencing tools. A patient schedules through a provider portal, receives a secure link, and joins at the appointment time. The clinician conducts an intake, reviews relevant history from the electronic health record, assesses the presenting concern, and documents the visit like any in-person encounter. Prescriptions, referrals, and follow-up orders can all be issued from this session.

Asynchronous (store-and-forward) is common in dermatology, radiology, and ophthalmology. A patient or referring provider uploads images, test results, or clinical notes; the specialist reviews asynchronously and returns findings. No real-time connection is required, which makes this model particularly useful for rural healthcare settings where specialist access is scarce.

Remote patient monitoring (RPM) involves FDA-cleared devices — blood pressure cuffs, continuous glucose monitors, pulse oximeters — that transmit readings to a clinical team. CMS reimburses RPM under CPT codes 99453, 99454, and 99457 (CMS Physician Fee Schedule), with the 99457 code requiring at least 20 minutes of interactive communication per month.

The technical infrastructure requires: a stable internet connection, a compatible device, and provider-side software that integrates with the electronic health record. A 2021 report from the Office of the National Coordinator for Health Information Technology (ONC) noted that approximately 37% of adults had a telehealth visit in the prior 12 months — a figure that reflects both the surge in availability and the persistent gap among populations without broadband access.

Common scenarios

Telehealth delivers real value in a defined set of clinical situations. These are the scenarios where it performs reliably:

  1. Behavioral health — psychiatry, therapy, and medication management for conditions like depression, anxiety, and ADHD. The American Psychiatric Association has documented telehealth's efficacy for most outpatient mental health encounters (APA Telepsychiatry Toolkit).
  2. Chronic disease management — follow-up visits for hypertension, diabetes, and heart failure, particularly when lab values are already known and the goal is monitoring rather than new diagnosis.
  3. Dermatology — store-and-forward review of skin lesions, rashes, or wound progression using high-resolution images.
  4. Post-operative follow-up — wound checks, medication reviews, and recovery assessments that don't require hands-on examination.
  5. Primary care triage — determining whether a symptom warrants in-person evaluation, urgent care, or a prescription refill.
  6. Medication management — prescription renewals for stable conditions where no new physical assessment is clinically indicated.

These scenarios share a common feature: the clinical question can be answered without touch, auscultation, or physical measurement beyond what a patient-operated device can provide.

Decision boundaries

The question that clinicians and patients face is when telehealth is the right tool — and when it is not.

Telehealth is poorly suited to new, undifferentiated complaints that require physical examination: abdominal pain of unknown origin, chest pain with no prior workup, acute neurological symptoms, or any scenario where the differential diagnosis depends on palpation, percussion, or auscultation. Emergency care and urgent care remain the appropriate setting for presentations that could deteriorate.

A meaningful structural contrast: established patient vs. new patient. An established patient with known hypertension seeking a medication adjustment is an ideal telehealth candidate. A new patient presenting with fatigue and unexplained weight loss is not — the diagnostic workup requires in-person evaluation, laboratory tests, and often imaging.

Access equity introduces a second boundary. Telehealth requires broadband, a device, and digital literacy. Healthcare access and equity data from the Federal Communications Commission and CMS consistently show that rural, elderly, and low-income populations face disproportionate barriers to telehealth — meaning the technology's promise of democratizing access has been unevenly realized. Audio-only telehealth was preserved under CMS waivers specifically to address patients without video capability, though it carries lower reimbursement.

State licensure is a hard boundary. Clinicians must generally hold a license in the state where the patient is located at the time of the visit. The Interstate Medical Licensure Compact (IMLC) facilitates multi-state licensure for physicians, but not all states participate, and the rules for nurses, therapists, and other clinicians vary independently.

References