Medical and dental practices have a higher-complexity payment environment than most small businesses: telehealth payments process at card-not-present rates regardless of whether the patient relationship is ongoing, patient payment portals add another CNP layer, and accepting HSA and FSA cards requires eligibility verification that standard POS systems don’t support. The net effect is an effective processing rate of 2.8%–3.1% for practices that haven’t optimized — compared to 1.8%–2.2% for practices on interchange-plus with good channel discipline.
A general practice doing $50,000/month in card payments at 3% pays $1,500/month. At 2% interchange-plus, that’s $1,000 — a $6,000/year difference that compounds with every year you stay on the wrong pricing model.
The card mix challenge: in-person, portal, and telehealth
The payment channels for a medical practice carry very different processing rates:
| Payment Channel | Transaction Type | Typical Rate | Notes |
|---|---|---|---|
| In-office card present (tap/chip) | Card-present | 2.6% or IC + 0.15% | Lowest rate; maximize use at front desk |
| Patient payment portal | Card-not-present | 2.9%–3.3% | Higher rate; often necessary for billing after insurance |
| Telehealth (pre-auth at booking) | Card-not-present | 2.9%–3.3% | CNP rate regardless of existing patient relationship |
| Phone payment | Card-not-present (keyed) | 3.3%–3.5% | Most expensive type; avoid where possible |
| HSA/FSA card (in-person) | Card-present debit | 1.5%–2.2% | Similar to consumer debit; requires IIAS compliance for FSA |
| ACH/bank transfer (via portal) | ACH | $0.25–$1.50 flat | Cheapest option where available; some patients prefer card |
The typical payment mix for a primary care or dental practice: 40%–50% in-person card (lowest rate), 35%–45% through patient payment portal (higher rate), 5%–15% telehealth. This mix produces an effective blended rate of 2.7%–3.1% — significantly higher than the advertised 2.6% rate that applies only to in-person card-present transactions.
Processor comparison: healthcare-focused options
| Processor | In-person rate | Portal/CNP rate | Healthcare-specific features | Monthly fee |
|---|---|---|---|---|
| Square (standard) | 2.6% + $0.10 | 2.9% + $0.30 | None; not HIPAA-compliant for PHI integration | $0 |
| Stripe (standard) | 2.7% + $0.05 | 2.9% + $0.30 | Stripe can sign HIPAA BAA but not healthcare-specialized | $0 |
| Helcim (interchange-plus) | IC + 0.15% + $0.06 | IC + 0.4% + $0.08 | No healthcare specialization but best rates at volume | $0 |
| Rectangle Health | Custom (est. 2.3%–2.7%) | Custom | Healthcare-specific: patient portal, HSA/FSA, payment plans, HIPAA-compliant | $40–$80 |
| Clover (via health-focused POS) | 2.3%–2.6% | 3.5% | Limited; some health PMS integrations | $14.95–$84.95 |
| PaySimple | 2.49% + $0.09 | 2.49% + $0.09 | Recurring billing, payment plans; used by some health practices | $49.95 |
Dollar cost at real medical practice revenue levels
| Monthly Card Revenue | Square blended (~2.8%) | Rectangle Health (~2.5%) | Helcim IC-plus (~2.0%) | Annual saving vs. Square |
|---|---|---|---|---|
| $15,000 (solo GP) | $420 | $455 (incl. software) | $300 | $1,440 |
| $30,000 (2-doctor practice) | $840 | $810 (incl. software) | $600 | $2,880 |
| $50,000 (dental practice) | $1,400 | $1,310 (incl. software) | $1,000 | $4,800 |
| $80,000 (multi-provider) | $2,240 | $2,060 (incl. software) | $1,600 | $7,680 |
When Rectangle Health beats Helcim: Rectangle Health’s healthcare-specific features (patient payment plans, HSA/FSA compliance, HIPAA-compliant portal) justify the monthly fee for practices where these features matter. At $30K+/month, the pure rate comparison favors Helcim — but if you need a fully integrated healthcare payment experience, Rectangle Health’s bundled offering may cost less than a general processor plus a separate healthcare portal.
HSA and FSA cards: what actually happens at checkout
Patients paying with HSA or FSA cards expect their healthcare expenses to process automatically. Here’s what actually happens and what can go wrong:
HSA (Health Savings Account) cards work like standard debit cards on the Visa or Mastercard network. The cardholder is responsible for using them only for eligible medical expenses; the card itself doesn’t enforce eligibility at the point of sale. Most medical charges at a doctor’s office process fine with an HSA card. If a charge includes a non-medical component (a gym membership sold through a medical practice, for example), the cardholder may be liable for penalty on improper HSA use — but the merchant sees a normal debit card transaction.
FSA (Flexible Spending Account) cards are more complex. Most FSA debit cards require IIAS (Inventory Information Approval System) compliance at merchants that don’t exclusively sell healthcare products. IIAS automatically verifies that items being purchased are eligible FSA expenses. Medical practices (healthcare-only merchants) are typically exempt from IIAS requirements — all charges at a medical office are presumed eligible. Dental practices, optometrists, and other clearly healthcare-category merchants also qualify for this exemption.
If your POS system isn’t healthcare-categorized: FSA cards may decline at the terminal if the merchant category code (MCC) doesn’t match eligible healthcare categories. Ensure your processor has you categorized correctly (MCC 8011 for doctors, 8021 for dentists, 8099 for other health services). An incorrect MCC causes FSA declines that look like card errors to the patient.
Telehealth and the CNP rate premium
Telehealth visits are card-not-present transactions regardless of how established the patient relationship is. A patient you’ve seen in person 30 times paying for a telehealth visit still pays at 2.9%–3.3% CNP rates.
The telehealth growth since 2020 has meaningfully shifted the payment mix for many practices. A practice that was 90% in-person before COVID now might be 50%–60% in-person, 30%–40% telehealth. The shift from 2.6% card-present to 3.0% CNP on that volume adds 0.4% to the effective rate on half of revenue — worth $100–$300/month on a $50K practice.
Mitigations:
- Pre-authorize cards at in-person check-in for upcoming telehealth appointments when possible (saves a CNP authorization)
- Offer ACH payment for telehealth billing — flat $0.25–$1 per transaction beats 3% CNP on any invoice over $33
- Patient payment plans via recurring billing avoid per-visit CNP charges on balance collections
Patient payment plans: the right way to collect balances
Many medical practices have significant patient balance collection challenges. Payment plans solve this, but the processing model matters:
| Payment Plan Model | Processing Rate | Collection Rate | Administrative Burden |
|---|---|---|---|
| Recurring card billing (card on file) | 2.9%–3.3% CNP per charge | High (automatic) | Low — set and forget |
| Recurring ACH (bank transfer) | $0.25–$1.50/transaction | High (automatic) | Low — ACH authorization signed once |
| Patient portal invoicing | 2.9%–3.3% CNP per payment | Moderate (relies on patient action) | Low — portal handles |
| Paper statement + mail | 0% on mailed check; 2.9% if card called in | Low (20%–40% typical) | High — printing, mailing, manual processing |
Recurring ACH for payment plans is the clear winner on cost: $1/transaction vs. $30+ on a $1,000 balance at 3% CNP. The barrier is patient authorization — you need a signed ACH authorization form. Most healthcare payment systems (Rectangle Health, CareCredit, Clearwave) support recurring ACH natively.
5 payment processing mistakes medical practices make
- Not knowing their blended effective rate. Most practice managers know the in-person rate on their merchant statement but don’t calculate the blended rate across all channels (portal, telehealth, phone, in-person). The real effective rate is almost always 0.3%–0.8% higher than the advertised in-person rate. Run the actual math against last month’s total processing fees divided by total card revenue.
- Using a generic POS for a practice with telehealth or portal billing. Square and basic Stripe accounts are not designed for healthcare billing workflows. They’re appropriate for in-person-only practices with simple billing. For any practice with a patient portal, telehealth, or complex balance collection, a healthcare-specific system (Rectangle Health, Kareo Payments, Clearwave) pays for itself in workflow efficiency and compliance.
- Incorrect merchant category code (MCC). An incorrect MCC causes FSA card declines and may affect interchange qualification. Verify your MCC when setting up or transferring to a new processor. Medical doctors should be MCC 8011; dentists MCC 8021.
- Not offering ACH for balance collection. Collecting a $500 patient balance via card-on-file CNP costs $15–$17 in processing fees. Collecting via ACH costs $0.25–$1.50. At 200 balance collections/month, the fee difference is $2,700–$3,100/year.
- No HIPAA Business Associate Agreement with the payment processor when PHI is involved. If your payment system stores or transmits patient data alongside payment data (name, appointment type, diagnosis code on a statement), the processor must be a HIPAA-compliant Business Associate with a signed BAA. Square and basic Stripe don’t sign BAAs by default. If PHI is involved, use a healthcare-specific processor or verify that your current processor will sign a BAA.