When Subspecialists Go Direct: How Cardiologists Build Memberships Around Long Visits and Complex Patients

A cardiologist running a membership practice sees fewer patients per day than a hospital-affiliated cardiologist, charges a monthly fee, and earns more clinical freedom than any insurance contract allows. The visits run 45 to 60 minutes. The physician-patient relationship is ongoing, not episodic. And the documentation burden that drives cardiologist burnout — largely from prior authorization and administrative overhead — disappears.

Cardiology has emerged as one of the strongest fits for the direct-care model, not because the specialty invented it, but because its patient profile maps onto the membership structure better than almost any other.

Why cardiologists are leaving conventional practice

The prior authorization burden in cardiology is not incidental. Stress tests, echocardiograms, cardiac catheterizations, and rhythm management devices routinely require insurer pre-approval before the patient can access them. Cardiologists spend hours each week in authorization queues for studies they have already decided their patients need — decisions that are clinical, not administrative, delayed by process.

Cardiology ranks among the specialties with above-average burnout, with administrative load as the primary driver. Prior authorizations, in-box management, and after-hours note completion routinely consume as many hours as direct patient care in a conventional practice — a pattern that has accelerated specialist exits from private practice.

The direct-care model addresses this at the root. No insurance means no prior authorization: the cardiologist makes the clinical decision and the patient proceeds. Memberships charge for the physician relationship; diagnostics are ordered at negotiated cash prices. The physician gets clinical autonomy; the patient gets access.

What cardiology direct care actually looks like

A cardiologist running a membership practice structures their work differently from a conventional clinic:

• Smaller panels. A direct-care cardiologist carries a fraction of the patient panel common in insurance-billed practice — a ratio that enables the ongoing, relationship-based care that complex cardiovascular patients require.
• Longer visits. New patient evaluations commonly run 60 minutes; follow-ups 30 to 45. A heart failure patient who needs a symptom inventory, medication review, and discussion of recent test results cannot be adequately managed in a 15-minute slot.
• Monthly membership fee. The fee covers the physician relationship, between-visit access, and care coordination. Diagnostics — labs, echocardiograms, stress tests — are billed separately at cash prices the practice negotiates with its lab and imaging providers.
• Ongoing access. A patient with coronary artery disease or atrial fibrillation needs to reach their cardiologist when symptoms change, not schedule three weeks out. Direct messaging and telehealth access are standard in a membership, not add-ons the patient pays for separately.

The patient profile that fits best: chronic cardiovascular disease (CAD, AFib, heart failure, structural heart disease), patients on complex medication regimens, and high-risk patients who want proactive monitoring or preventive cardiovascular risk evaluation.

How memberships are configured in SigmaMD

In SigmaMD, cardiologists configure membership plans in the Billing section — defining the plan name, billing cycle (monthly or quarterly), pricing, and coverage policies. Enrollment generates the billing schedule automatically; charges process without manual invoicing each cycle. The membership setup guide covers the process from plan creation through patient enrollment.

SigmaMD supports billing diagnostics separately from the membership. When a cardiologist orders a stress test or echocardiogram outside the membership scope, the practice creates an invoice for that study independently — the billing workflow supports both the flat membership charge and itemized charges for additional services, without a separate billing system.

Lab and imaging in a cardiology membership

Cardiology direct-care practices run more diagnostic testing per patient than most DPC practices. Lipid panels, BMP and CMP, cardiac biomarkers, thyroid function, and INR monitoring for anticoagulated patients are ordered on a predictable schedule. In SigmaMD, cardiologists order labs directly from the patient chart; practices connect with Labcorp through Healthcare Procurement Solutions (HPS), a no-cost group purchasing organization with pre-negotiated cash-pay rates, or with Quest Diagnostics with support from SigmaMD's customer success team. The diagnostic provider setup guide covers what SigmaMD needs to establish each interface and route results back to the chart automatically.

Custom lab panels are built inside SigmaMD — a quarterly lipid and metabolic panel for patients on statins, a troponin and BNP panel for a heart failure follow-up, an INR-only draw for a patient on warfarin. The practice defines each panel once; reordering takes a few clicks rather than adding tests individually each time.

For imaging, SigmaMD's imaging order screen lets the cardiologist select the provider, set the billing type, and mark orders STAT when clinical urgency requires it. Echocardiograms, nuclear stress tests, and cardiac MRI studies that are not performed in-office route as referrals — not in-house orders. SigmaMD Scribe now correctly classifies these as specialist referrals rather than pended in-house orders, keeping the documentation accurate from the first draft.

Documentation and chart insights for long cardiology visits

A 45-minute cardiology visit generates more structured documentation than a standard DPC encounter. In SigmaMD, cardiologists build note templates and snippets tailored to their common visit types — a chronic CAD follow-up template that structures symptom review, medication reconciliation, and BP and HR trend notation; a new AFib assessment template; a heart failure decompensation template with weight, edema severity, and functional status fields. These are templates the practice creates and refines; the clinical structure is theirs to define, not a fixed default.

Note templates and snippets work with SigmaMD Scribe, the AI documentation assistant that records ambient audio during the visit and generates a structured draft note. The cardiologist reviews and signs; Scribe handles the capture. Recent improvements to problem-list extraction and medication reconciliation accuracy reduce the post-visit documentation pass to editing rather than rewriting from scratch.

Before and between visits, Sigma AI — SigmaMD's in-app conversational assistant — lets the cardiologist retrieve patient chart information by asking in plain language: recent INR values for a patient on warfarin, the last several BNP results for a heart failure patient, or ICD-10 code suggestions for a complex presentation. Sigma AI reads the chart and returns the answer directly, without requiring the physician to navigate through multiple tabs. The Sigma AI overview covers what it currently handles.

Referrals and care coordination

Cardiology memberships routinely involve coordinating care with primary care physicians, electrophysiologists, cardiac surgeons, and interventional cardiologists. In SigmaMD, referral PDFs are generated directly from the patient chart — the cardiologist clicks "Referral," selects what to include (problems, medications, allergies, lab results, ICD-10 codes), adds a cover page with their signature, and sends via the integrated fax service. The Creating a Patient Referral guide walks through every step. Referrals can attach signed clinical notes, prior imaging results, and uploaded documents — everything the receiving physician needs, without a separate records request.

Between-visit access

The between-visit layer is what most cardiovascular patients cite as the highest-value part of a membership. A patient who detects a new arrhythmia on a wearable device needs a physician response that day — not a triage nurse and a slot three weeks out. In SigmaMD, patients message their cardiologist through the SigmaMD Patient App or web portal at patient.sigmamd.com; messages are end-to-end encrypted and route directly to the clinician interface. If a message goes unanswered, the patient receives an SMS notification so urgent symptom reports do not sit unread.

For symptoms that warrant real-time assessment, SigmaMD's built-in telehealth lets the cardiologist start a video visit from the patient chart — the patient joins via SMS link, no separate app required. Patients can also self-schedule follow-up visits in the SigmaMD Patient App.

FAQ

Can a cardiologist run a full direct-care practice, or does the model require hybrid billing?

Both work. Fully cash-pay cardiology practices operate without insurance contracts or prior authorization. Hybrid models carry membership patients alongside insurance-billed patients; the administrative overhead of maintaining both reduces but does not eliminate the efficiency gains on the direct-care side.

How does a direct-care cardiologist handle procedures like cardiac catheterization?

Procedures requiring hospital or catheterization lab infrastructure are typically done through a facility contract and billed to insurance or self-pay. The membership covers the physician relationship and office-based care; hospital procedures are outside its scope. Most membership cardiologists hold courtesy privileges at a facility for exactly this purpose.

What cardiovascular conditions are the best fit for a direct-care membership?

Coronary artery disease, atrial fibrillation, heart failure, structural heart disease, and patients on complex anticoagulation regimens fit the model well. The common thread is the need for ongoing monitoring and rapid between-visit access — a care pattern insurance reimburses poorly but memberships handle directly.

What is the next step to set up a direct-care cardiology practice?

SigmaMD is built for direct-care and specialty practices — membership billing, lab ordering with cash pricing, AI documentation with Scribe, chart insights with Sigma AI, referral generation, and secure patient messaging are all part of the platform. Cardiologists evaluating EMRs can review the guide to choosing an EMR for direct care and see how other specialists — including neurologists building direct-care practices — are using SigmaMD. Book a demo to see how SigmaMD handles a cardiology workflow.