Medical and Health Services: Topic Context
Medical and health services delivered through telehealth represent a rapidly expanding segment of the United States healthcare system, governed by overlapping federal and state regulatory frameworks. This page establishes the definitional boundaries of that landscape, explains the operational mechanisms that distinguish telehealth from in-person care, and maps the clinical and administrative scenarios where these services apply. The medical and health services directory that accompanies this resource organizes providers and platforms within these same categorical boundaries.
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, and public health and health administration. The Centers for Medicare and Medicaid Services (CMS) applies a narrower operational definition for reimbursement purposes, distinguishing telehealth services that qualify under 42 CFR §410.78 from broader remote health activities.
The scope of medical and health services delivered via telehealth includes, but is not limited to:
- Synchronous clinical visits — real-time audio-visual encounters between licensed clinicians and patients
- Asynchronous store-and-forward services — transmission of recorded health information reviewed by a provider outside real time
- Remote patient monitoring (RPM) — continuous or episodic collection of physiologic data transmitted from patient to provider
- Mobile health (mHealth) interventions — application-based tools that support diagnosis, treatment adherence, or wellness
- Telepharmacy and e-prescribing — pharmacist review and prescription management conducted remotely
The distinction between synchronous and asynchronous delivery is operationally significant and is covered in detail at synchronous vs asynchronous telehealth. The parallel question of how telehealth differs from the narrower term telemedicine is addressed at telehealth vs telemedicine definitions.
Federal scope is shaped primarily by the Social Security Act, the Ryan Haight Online Pharmacy Consumer Protection Act of 2008, and HIPAA (45 CFR Parts 160 and 164). State scope is additionally shaped by individual medical practice acts and licensure statutes that vary across all 50 jurisdictions.
How it works
Telehealth delivery follows a structured sequence that parallels in-person clinical care while introducing technology-specific compliance requirements at each phase.
Phase 1 — Patient eligibility and access determination. Eligibility is assessed against payer rules (Medicare, Medicaid, or private insurance), geographic or site-of-service requirements, and the availability of compatible technology on the patient side. CMS historically required that Medicare telehealth patients originate from rural Health Professional Shortage Areas (HPSAs); pandemic-era waivers under the COVID-19 Public Health Emergency suspended that requirement, and Congress has extended certain flexibilities through legislation.
Phase 2 — Informed consent. Providers must obtain telehealth-specific informed consent in most states. The Joint Commission and the American Telemedicine Association (ATA) have published standards addressing disclosure of technology limitations, privacy risks, and the right to opt for in-person alternatives. State-level consent requirements are non-uniform; the telehealth informed consent standards reference covers state-by-state variation.
Phase 3 — Clinical encounter. The encounter is conducted over a HIPAA-compliant platform. The Office for Civil Rights (OCR) within HHS enforces platform requirements under 45 CFR §164.312 (technical safeguards). Covered entities must execute Business Associate Agreements with platform vendors. Requirements are elaborated at telehealth HIPAA compliance requirements.
Phase 4 — Documentation and coding. Encounters are documented in the electronic health record and coded using CPT and HCPCS codes specific to telehealth modalities. CMS publishes an annual Physician Fee Schedule that lists eligible telehealth services; the 2024 schedule expanded the permanent telehealth list relative to pre-2020 baselines.
Phase 5 — Reimbursement submission. Claims are submitted to payers with appropriate place-of-service codes (02 for telehealth other than in the patient's home; 10 for telehealth in the patient's home, effective 2022). Reimbursement rates and eligible codes are catalogued at telehealth reimbursement rates and codes.
Common scenarios
Telehealth applies across a broad clinical spectrum. The highest-volume documented use cases fall into four categories:
Primary and preventive care — Routine follow-up, medication management, and chronic disease check-ins. Telehealth for primary care is among the most reimbursable categories under both Medicare and commercial payers. See telehealth for primary care.
Behavioral health — Mental health therapy, psychiatric evaluation, and substance use disorder treatment constitute the largest single telehealth specialty segment by encounter volume, according to data published by the Centers for Disease Control and Prevention (CDC) and FAIR Health. The regulatory framework for this category intersects with the federal Mental Health Parity and Addiction Equity Act (MHPAEA). Telehealth mental health and behavioral services provides further classification.
Chronic disease management — Conditions including diabetes, hypertension, and heart failure are actively managed through RPM-supported telehealth programs. CMS reimburses RPM under CPT codes 99453, 99454, 99457, and 99458 when documentation and time thresholds are met.
Urgent and acute care — Direct-to-consumer platforms address episodic, low-acuity conditions. These platforms operate under state-specific protocols distinguishing urgent telehealth from emergency services, which are explicitly excluded from telehealth reimbursement frameworks.
Decision boundaries
Telehealth is not clinically or legally equivalent to in-person care in all circumstances. Regulatory and clinical standards establish firm boundaries:
Prescribing limits — The Ryan Haight Act prohibits prescribing controlled substances via the internet without a prior in-person evaluation, with narrow DEA-registered exceptions. The DEA's telemedicine prescribing rules, finalized under 21 CFR Part 1300, govern this boundary. Detail is available at DEA telemedicine prescribing regulations.
Licensure jurisdiction — A provider must hold an active license in the state where the patient is physically located at the time of the encounter, not where the provider practices. The Interstate Medical Licensure Compact facilitates multi-state licensing for qualifying physicians but does not override state-specific practice requirements.
Platform type classification — Store-and-forward telehealth (asynchronous) is reimbursable under Medicare only in Alaska and Hawaii under standard rules, representing a geographic restriction that distinguishes it sharply from synchronous video visits eligible nationally under applicable waivers and legislation.
Emergency exclusion — No telehealth framework authorizes the replacement of emergency medical services. EMTALA obligations apply to hospital-based telehealth programs, and no payer classification code exists for telehealth delivery of emergency stabilization services.
Social Security Act amendments — The Social Security Fairness Act of 2023, enacted January 5, 2025, amended the Social Security Act by repealing the Windfall Elimination Provision (WEP) and the Government Pension Offset (GPO). These provisions had previously reduced Social Security benefits for individuals who also receive pensions from employment not covered by Social Security. Their repeal increases Social Security benefit amounts for affected public-sector workers retroactive to January 2024, with direct downstream implications for Medicare eligibility determinations, Part B premium calculations, and benefit coordination for affected beneficiaries. Benefit increases resulting from the repeal may affect income-related Medicare premium thresholds (IRMAA) and related cost-sharing obligations. The Social Security Administration (SSA) is actively processing retroactive payments and recalculating ongoing benefit amounts as of the January 5, 2025 effective date. CMS and SSA guidance on how these changes interact with Medicare telehealth eligibility and reimbursement should be consulted for affected populations, as administrative processing timelines and interim guidance continue to evolve.
The telehealth regulatory framework for the United States consolidates the federal statutory and regulatory instruments that define these boundaries across all service types and payer categories.