UHC CO-45 Contractual Adjustments in Cardiology
Charge exceeds fee schedule/maximum allowable or contracted/legislated fee arrangement. Copy-paste appeal letter with documented overturn rate and attachment checklist for UnitedHealthcare in Cardiology.
Verify before filing
Filing deadlines, appeal addresses, and policy criteria in this template reflect typical payer behavior at publication. UnitedHealthcare updates policies frequently and plan-level rules vary by employer group, state, and line of business. Always cross-check the specific deadline and filing address on your EOB, and confirm current UnitedHealthcaremedical-policy language through the payer’s provider portal before submitting an appeal. Overturn-rate language below reflects AAPC-reviewer consensus, not payer-published statistics.
When to use this template
UHC CO-45 in cardiology is the contractual adjustment between billed and allowed amounts under the provider's UHC contract. Most CO-45 is routine. The provider's charge master is set above the contracted rate, and the difference is a normal write-off. These are NOT appealable.
Attachment checklist
- Ordering provider note with clinical indication
- Prior workup or conservative-care documentation
- Payer medical policy reference citing met criteria
- Retroactive authorization request (if applicable)
Missing any one of these is the single largest cause of appeal denials. Build a pre-filing checklist before you submit.
Copy-paste letter template
Swap in your patient details at every [bracketed field]. Attach the documentation listed above. Submit within 180 days of the original adjudication.
[Not a clinical appeal, payment dispute] [Practice Letterhead] [Date] UHC Provider Relations / Contract Management Re: Payment Dispute. CO-45 Variance Provider: [Practice Name, NPI, TIN] Contract: [Contract ID / Effective Date] Dispute Period: [Date range] CPT Codes Affected: [list] Dear Provider Relations: We are disputing the allowed amounts on the following claims where the CO-45 contractual adjustment appears inconsistent with our contracted rate. Contracted rate per contract dated [date]: CPT [X] = $[Y] allowable. Claims disputed: 1. Claim [#], DOS [date], Member [ID]: Allowed $[A] (expected $[Y], variance $[A-Y]) 2. [Repeat for each outlier claim] Documentation attached: 1. Provider contract excerpt showing CPT [X] contracted rate 2. EOB copies for disputed claims 3. Fee-schedule summary for the affected CPT We respectfully request review and adjustment of these claims to the contracted rate. Sincerely, [Billing Manager / Practice Administrator]
Investigate only when the CO-45 variance is unusually large or inconsistent across claims. Routine CO-45 adjustments are valid contractual write-offs and should not be appealed.
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Related templates
Same code, different payer. Or same payer, different problem
Want the full playbook for this scenario?
The complete playbook page covers why UnitedHealthcare throws CO-45 specifically in cardiology, the exact fix workflow, filing deadlines, high-risk CPTs, and FAQs. Plus this same copy-paste letter.
Read the full playbookCommon questions on this template
How long do I have to file a CO-45 appeal with UnitedHealthcare?
180 days from the initial adjudication date for most UnitedHealthcare plans. Corrected claims (for administrative fixes like missing modifiers or auth numbers) have a different and usually longer window. Always confirm the specific deadline on the EOB for your claim.
What is the typical overturn rate for this denial type?
60-75 percent when a documented contract-rate mismatch exists. Success depends heavily on documentation completeness and whether the clinical criteria in UnitedHealthcare's medical policy are matched point-by-point in the appeal.
Should I file this as a corrected claim or a formal appeal?
CO-45 denials are usually formal clinical appeals. The template below follows the formal-appeal structure. Use a corrected claim only if the fix is administrative (a missing modifier, wrong NPI) rather than clinical.
Can I reuse this template for other payers?
The structure works for any payer, but the filing address, deadline, and policy references are specific to UnitedHealthcare. Check our other templates for payer-specific versions; we have 50+ payer/code combinations in the directory.
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