Paypal, cash, check, credit cards, and insurance are all acceptable forms of payment.
I am in-network with MHN, ComPsych, and Tricare West.
For PPO plans, I provide you with a receipt (usually called a superbill) with all the information needed to submit to your plan for reimbursement.
To find out if this can be done with your plan, call your plan and ask them these questions.
In the office, credit cards are processed through Square, which can handle Visa, Mastercard, American Express, and Discover. Health Savings Accounts can often be used via a debit card that is compatible with the above credit cards.