Most multi-PC groups discover the answer to this question the hard way: it takes longer than they planned for, and the cash flow consequences arrive before the accounts do.

At a generalist business bank, opening accounts for a 5-PC structure runs 35 to 75 days. At a healthcare-native bank, the same setup is 5 to 10 days. The gap matters because every day without a working account is a day insurance reimbursements can't land, payer EFT enrollments can't be filed, and patient billing can't fund payroll.

Why Generalist Banks Take 35 to 75 Days

Generalist business banks treat each PC like a separate, unrelated business. Every entity goes through full onboarding from scratch:

• Documentation collection: articles of incorporation, EIN letter, beneficial ownership disclosures, operating agreement.

• KYC review: 7 to 15 days per entity, often serialized rather than parallel.

• Underwriting: deposit limits, ACH velocity caps, wire authorization. Each entity reviewed independently.

• Account activation: routing numbers issued, debit cards mailed, online banking provisioned.

For 5 PCs, that pattern multiplies. A bank with a 7-day per-entity timeline can take 35 days at minimum. Banks that don't run multi-entity onboarding in parallel can stretch to 75 days or more.

None of this includes payer EFT enrollment, which depends on having a working bank account first. Add another 30 to 60 days for payer enrollment after account activation.

Why Healthcare-Native Banks Take 5 to 10 Days

Healthcare-native banking platforms assume MSO-PC from day one. The onboarding flow is designed for multi-entity structure rather than retrofitting a single-entity flow:

• Documentation: collected once for the MSO and reused (where legally permissible) across PCs. Beneficial ownership and KYC reviewed in parallel.

• Underwriting: applied at the structure level, not the entity level, so deposit limits and velocity caps are set consistently across all PCs.

• Account activation: all entities provisioned together, with consolidated dashboard access.

• Payer EFT enrollment support: routing numbers and account documentation made available immediately so the practice can file payer enrollments in parallel with onboarding completion.

Lemma's onboarding for a 5-PC group typically runs 5 to 10 business days. Adding a 6th or 7th PC later runs 2 to 5 days because the structure is already in place.

What to Do During the Gap

Whatever timeline your bank runs, a few moves shrink the practical impact:

• File payer EFT enrollments the moment routing numbers are available, even if accounts aren't fully activated. Most payers accept enrollment with a pending status.

• Open virtual accounts for per-location attribution while waiting on the underlying entity accounts to clear.

• Document intercompany flow expectations in the management services agreement before accounts open. Once accounts are live, sweep rules can be configured to match.

• Avoid signing payer contracts on a timeline that assumes accounts are already open. Build buffer.

What Lemma doesn't do: it doesn't fast-track payer enrollment with the carriers themselves, or replace the legal documentation work that has to happen for each PC. It removes the bank-side delay so payer enrollment can start sooner.

Open a free Lemma account in 5 minutes per entity. Multi-entity MSO-PC onboarding in 5 to 10 days, virtual accounts for payer routing, and FDIC coverage up to $10M per entity via IntraFi sweep.