CO-58 denial code: rendered in an inappropriate or invalid place of service

Claim adjustment reason code 58 says: treatment was deemed by the payer to have been rendered in an inappropriate or invalid place of service.

With group code CO, the patient can't be billed. Whether it can be fixed depends on whether the place of service was simply coded wrong, or the payer doesn't cover the service in that setting.

CO-5 says the code and the place of service don't fit together on the claim. CO-58 is the payer's judgement that the setting itself wasn't appropriate or valid for the service. Payers use both for setting problems, so the first check is the same: was the place of service correct?

• Telehealth billed with the wrong setting. Remote visits use place of service 02 or 10, and some payers require a telehealth modifier as well. A payer that doesn't cover a service by telehealth may deny it as CO-58.
• A service the payer covers only in a facility was billed from an office, or the reverse.
• An invalid or deleted place of service code.
• The setting on the claim doesn't match the location's enrollment with the payer.

1. Confirm where and how the service was provided, including whether it was by telehealth.
2. If the place of service was wrong, correct it and resubmit.
3. If it was right, check the payer's policy for the service in that setting, and appeal if the policy covers it.
4. If the payer doesn't cover it in that setting, review whether the patient was told in advance.

• Set the place of service from the visit type, so telehealth visits are coded as telehealth.
• Check each payer's telehealth and setting rules for the services you provide remotely.
• Keep each location's enrollment in line with the settings it bills.

CO-58 is decided by the setting on the claim, so it is caught at billing.

Claira Health's AI agents catch this before the claim goes out, and tell your biller what's wrong in plain English. Your team sees only what needs a decision, and approves every step. On a 20-minute call, we’ll walk through it using one of your own denials.

See also the behavioral health page, where telehealth is most common. Book a 20-minute call.