Short answer
Yes, North American Credit Services, Inc. ("NACS") is legit -- a real medical collection agency in Chattanooga, Tennessee, not a scam. It collects healthcare bills on contingency for providers and does not own the debt. Confirm the exact name and Chattanooga address, then work the medical bill first: demand an itemized statement and match every line to your insurer's EOB before you pay a deductible or coinsurance balance.
Who they are
North American Credit Services, Inc. -- "NACS" -- is a contingency medical collection agency: it collects hospital and provider bills on behalf of its clients and does NOT buy or own the debt. Because it is an agency, a validation request forces it to name the original provider.
- Confirm the exact name and address. Match the Chattanooga, Tennessee address on your letter -- the initials "NACS" are also used by an unrelated convenience-store trade association, so pin down the Chattanooga medical agency.
- It's a collector, not the provider. Your dispute rights run against both the agency and the original hospital or clinic.
Match the balance to your EOB first
The most common issue with a medical collector like this is a deductible or coinsurance balance you thought insurance already paid. Attack the bill itself before you settle -- medical balances are frequently reduced or written off.
- Itemize and reconcile your EOB. Demand an itemized statement and match every line to your insurer's Explanation of Benefits; if it doesn't match, that's a dispute, and the bill may never have been correctly submitted to insurance.
- Check the No Surprises Act for surprise out-of-network or emergency charges.
- Ask about charity care. Nonprofit hospitals must offer financial assistance (501(r)); you may owe far less -- or nothing.
Protect your rights -- and how to settle
Send a written validation request within 30 days demanding the amount and the original provider, and don't admit the debt or promise payment on a call -- that can restart the statute of limitations on an old bill. A genuinely-owed balance, once validated and reduced to what you actually owe, can often be settled in writing; get any agreement in writing before you pay, and a forgiven balance over $600 may trigger a 1099-C. Watch for impostor red flags: demands for gift cards, wire, or crypto, or threats of arrest, are scams -- not NACS.
This page is general information, not legal, medical, or tax advice. Your rights and timelines vary by state; consider consulting a qualified attorney, a nonprofit credit counselor, or legal aid.