CO-5 — Place-of-Service Inconsistent or Invalid
The two-digit Place of Service (POS) code on the claim doesn't match the type of service billed, or the payer considers that setting invalid/inappropriate for this specific service.
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In plain language
The two-digit Place of Service (POS) code on the claim doesn't match the type of service billed, or the payer considers that setting invalid/inappropriate for this specific service.
Start here
Confirm the actual location where the service was rendered from scheduling/registration records.
Who resolves it
Billing/Follow-Up
Who prevents it
Registration/Scheduling — accurate encounter-location capture; Charge Capture — POS-to-service validation before claim submission.
Sources
- X12 CARC list; X12 RARC list; CMS Place of Service Code Set
Validated ClaimetryX Source — Denial Management Knowledge Base, 2026 Research Edition
Research date August 18, 2026. CARC/RARC combinations and payer processes vary. Always check the specific remittance advice and the payer's current requirements before acting on any denial.
Published by ClaimetryX. Sources identify the code standards, agency guidance, and payer policies supporting this reference. How we use sources
How to resolve this denial, step by step
- 1
Confirm the actual location where the service was rendered from scheduling/registration records.
- 2
Compare to the POS code billed.
- 3
If mismatched due to data entry, correct the POS code and resubmit.
- 4
If the service has a POS-specific restriction (e.g., incident-to requiring POS 11), confirm all conditions for that billing method were actually met before resubmitting under that POS.
- 5
Document the POS verification outcome.
- 6
Escalate to Registration/Scheduling if a specific location is consistently mis-coded.
Then choose the correct disposition
Corrected claim
for POS data-entry errors.
Compliance escalation
if there's a suggestion to bill a facility-based service as office- based (or vice versa) merely to obtain a more favorable payment rate without matching the actual encounter location.
Stop and escalate when
- Pattern suggesting POS is being selected for payment-rate advantage rather than actual encounter location (compliance issue).
What Needs to Be Corrected
- Claim correction: If the POS code was simply mis-keyed relative to the actual encounter location, correct and resubmit.
- Upstream correction: If registration/scheduling consistently mis-records encounter location for a given service line or provider, that workflow needs correction.
Do Not Do This
- Do not misrepresent the place of service to obtain a higher (e.g., non-facility) payment rate.
- Do not bill incident-to under POS 11 if the service was actually rendered in a hospital or SNF setting.
Plain-Language Meaning
- The two-digit Place of Service (POS) code on the claim doesn't match the type of service billed, or the payer considers that setting invalid/inappropriate for this specific service.
Why the Claim Was Denied
- Claim construction: wrong POS code entered (e.g., POS 11-Office billed for a service actually performed in a facility setting, or vice versa)
- Charge capture: scheduling/registration recorded the wrong encounter location
- Coding: service has specific POS restrictions (e.g., incident-to billing requires POS 11/non- facility settings; certain telehealth codes require POS 02/10)
Information the Biller Must Review
- POS code billed, actual encounter location per registration/scheduling record, CMS POS code set definitions, payer-specific POS-to-service restrictions (e.g., incident-to requires a non- institutional, office setting).
Sample Scenario
- Scenario: Claim denied CO-5/M77.
- Finding: Service was performed in the hospital outpatient department (POS 22) but billed as POS 11 (office) due to a scheduling-template default.
- Action: Corrected claim submitted with POS 22; scheduling template default corrected for that department.
Denial Identifier
- Primary CARCs: CO-5 — "The procedure code/type of bill is inconsistent with the place of service." CO-58 — "Treatment was deemed by the payer to have been rendered in an inappropriate or invalid place of service." (X12)
- Common RARC: M77 — "Missing/incomplete/invalid/inappropriate place of service."
Prevention Control
- Claim-scrubber POS-to-CPT compatibility edits; scheduling-system location field tied directly to POS code generation; periodic audit of POS billing patterns by service line.
Department Most Likely Responsible
- Resolves current claim: Billing/Follow-Up. Prevents recurrence: Registration/Scheduling — accurate encounter-location capture; Charge Capture — POS-to-service validation before claim submission.
AI Answer Guardrail
- Confirm the actual physical location where the service was rendered before recommending any POS code change — never suggest a POS change made only to increase reimbursement.
AI Search Terms / Synonyms
- CO5; CO-5; CO58; place of service denial; POS mismatch; invalid place of service; M77.
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