Store-and-Forward Telehealth: How It Works

Store-and-forward telehealth is an asynchronous delivery model in which clinical data — images, videos, audio recordings, lab results, or patient histories — are captured at one point in time and transmitted to a specialist or reviewing clinician for evaluation at a later time. Unlike live video visits, no simultaneous connection between patient and provider is required. This model is one of the three federally recognized telehealth modalities, alongside synchronous video and remote patient monitoring, and it carries distinct regulatory, reimbursement, and clinical-workflow implications that practitioners and health systems need to understand precisely.

Definition and scope

Store-and-forward telehealth is formally defined by the Centers for Medicare & Medicaid Services (CMS) as the "asynchronous transmission of a beneficiary's medical information from an originating site to a physician or practitioner at a distant site" (CMS Medicare Claims Processing Manual, Chapter 12, §190). The Health Resources and Services Administration (HRSA) uses functionally equivalent language in its telehealth program guidance, distinguishing the model by the absence of real-time interaction.

Within the broader landscape covered in the telehealth vs. telemedicine definitions reference, store-and-forward occupies a precise category: it is telehealth, not a live encounter. The scope encompasses four primary data types:

1. Static images — dermoscopic photographs, wound photos, retinal scans, radiographic images
2. Video clips — recorded gait analysis, wound video, ophthalmologic recordings
3. Biosignal data — EKG traces, spirometry results, audiograms transmitted in batch
4. Structured clinical data — patient-completed symptom surveys, referral packets, medication histories

The American Telemedicine Association (ATA) classifies store-and-forward as a distinct service delivery model in its practice guidelines, separate from real-time and remote monitoring services (ATA Practice Guidelines).

How it works

The store-and-forward workflow follows a discrete sequence that separates data acquisition from clinical review.

Phase 1 — Data capture. A patient, primary care provider, or allied health professional collects the required clinical data. In dermatology, this is typically a standardized set of photographs taken under defined lighting conditions. In teleradiology, it is a DICOM-format image file generated by an imaging device.

Phase 2 — Secure storage. Captured data is stored in a HIPAA-compliant repository. Under the HIPAA Security Rule (45 CFR Part 164), data at rest must be protected with encryption and access controls. The platform handling the data must qualify as a Business Associate under 45 CFR §164.308. Telehealth platform compliance requirements are detailed further in telehealth HIPAA compliance requirements.

Phase 3 — Asynchronous transmission. Data is forwarded through a secure channel to a distant specialist or reviewing clinician. Transmission may be immediate upon upload or queued for batch processing, depending on workflow design.

Phase 4 — Specialist review. The receiving clinician reviews the data independently, applies clinical judgment, and generates a structured report or response. This phase may occur hours or days after capture, which is the defining feature of the asynchronous model.

Phase 5 — Report delivery. Findings are returned to the originating provider or, in direct-to-consumer models, to the patient. The report functions as the clinical deliverable and may trigger a follow-up synchronous encounter.

This five-phase structure means that quality depends heavily on the data-capture standards applied in Phase 1. Poor image resolution or incomplete history packets degrade diagnostic accuracy at Phase 4 without any mechanism for real-time correction — a structural risk category absent from synchronous models.

Common scenarios

Store-and-forward is not universally applicable. It is best suited to conditions where visual or structured data is diagnostically sufficient without real-time dialogue. The following specialties have the highest documented adoption:

Teledermatology — The most established store-and-forward application. Dermatologists review standardized dermoscopic images submitted by primary care providers or patients. The American Academy of Dermatology supports the model for triage and diagnosis of pigmented lesions and chronic skin conditions.

Teleradiology — Radiologists remotely interpret imaging studies transmitted as DICOM files. This is the longest-standing asynchronous telehealth application, predating modern telehealth policy frameworks.

Teleophthalmology — Diabetic retinopathy screening programs use retinal photographs captured in primary care or community settings and reviewed by ophthalmologists. The Veterans Health Administration (VHA) operates one of the largest such programs in the United States, screening patients at more than 150 facilities.

Telestroke and neurology — CT scan images from emergency departments are forwarded to vascular neurologists for rapid interpretation, frequently combined with a synchronous consultation.

Wound care and orthopedics — Wound photographs and radiographic studies are transmitted for specialist review, particularly in rural health and post-acute settings.

Decision boundaries

Store-and-forward is appropriate only within defined clinical and regulatory parameters. Understanding where it applies — and where it does not — is essential for compliant program design.

Federal reimbursement limits. CMS currently reimburses store-and-forward services under Medicare only when the originating site is located in Alaska or Hawaii, per the federal telehealth demonstration program authority (Social Security Act §1834(m)). Outside those states, Medicare does not separately reimburse asynchronous store-and-forward encounters as standalone services, though it may reimburse the associated office visit. Note that the Social Security Fairness Act of 2023, enacted January 5, 2025, amended certain Social Security Act provisions; however, Medicare store-and-forward geographic restrictions under §1834(m) were not modified by that legislation. State Medicaid programs vary; the telehealth Medicaid coverage by state reference provides structured state-level detail.

Store-and-forward vs. synchronous telehealth. The critical distinction is clinical appropriateness. Store-and-forward is contraindicated when:
- The patient's condition may require urgent intervention before a delayed review cycle completes
- Diagnosis requires real-time physical examination or dynamic assessment (e.g., auscultation)
- The patient requires contemporaneous informed consent dialogue rather than written consent only

The synchronous vs. asynchronous telehealth comparison covers these boundaries in full.

State law variation. Forty-three states and Washington D.C. have enacted some form of telehealth coverage law, but store-and-forward-specific provisions differ materially by jurisdiction (Center for Connected Health Policy, State Telehealth Laws and Reimbursement Policies). The state telehealth laws and policies reference provides jurisdiction-specific breakdowns.

Licensure. The reviewing clinician must hold an active, unrestricted license in the state where the patient is located at the time of service, regardless of modality. Store-and-forward does not create an exception to geographic licensure requirements under state medical practice acts. The interstate medical licensure compact provides one pathway to multi-state practice.

Prescribing limits. A store-and-forward encounter alone does not establish the valid patient-practitioner relationship required for prescribing under the Ryan Haight Online Pharmacy Consumer Protection Act (21 U.S.C. §829). Prescribing based solely on asynchronous data review carries specific legal risk addressed in telehealth prescribing laws and limits.

References

• Centers for Medicare & Medicaid Services — Medicare Claims Processing Manual, Chapter 12
• Health Resources and Services Administration (HRSA) — Telehealth Programs
• American Telemedicine Association — Practice Guidelines
• Center for Connected Health Policy — State Telehealth Laws and Reimbursement Policies
• Electronic Code of Federal Regulations — 45 CFR Part 164 (HIPAA Security Rule)
• Social Security Act §1834(m) — Medicare Telehealth Services
• Social Security Fairness Act of 2023, Pub. L. 118-196 (enacted January 5, 2025)
• Veterans Health Administration — Telehealth
• Drug Enforcement Administration — Ryan Haight Act (21 U.S.C. §829)