Why Is Aetna Medicare Denying J1010 Methylprednisolone With Nerve Block Codes?
A J1010 methylprednisolone denial from Aetna Medicare as non-covered usually follows the nerve block line, not the drug. Since October and November…
Medical Billing 101 – Free Denial Code, CPT & RCM Guides
Find what a denial code means in plain English and the steps to fix it.
Most Used RCM & Denial Resolution Guides
- Appeal Letter Generator Build an editable payer appeal letter from the denial code, claim details and the arguments that fit.
- Timely Filing & Appeal Deadline Calculator Work out the claim, corrected claim or appeal deadline and how many days you have left.
- Denial Code Lookup (CARC & RARC) Find what a denial code means in plain English and the steps to fix it.
- CO-97 Bundling Denials: NCCI Edits and Modifiers Check the NCCI edit, decide whether modifier 59 or an X modifier applies, and correct or appeal.
- CO-16 Missing Information Denials Read the remark code, fix the missing or invalid claim data and resubmit.
- CO-29 Timely Filing Denials Prove the claim went out on time, or find the exception that lets you appeal.
- CO-50 Medical Necessity Denials Match the diagnosis to the coverage policy and build the records for an appeal.
- ER Visit Denied as Not an Emergency Use the prudent layperson rule to appeal an emergency room denial.
- About the Author: Manikandan J, CPC, CRCR Who writes and fact-checks these guides, with 10+ years in US revenue cycle management.
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Appeal Letter Generator
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Timely Filing Deadline Calculator
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Denial Code Lookup
Search any CARC/RARC (e.g. CO-97, CO-16) for its meaning and fix steps.
NPI Lookup
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RVU Calculator
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Global Period Calculator
Enter a CPT code and surgery date to see the pre-op day, the end of the global period and modifiers.
E/M Level Calculator
Pick an office visit code (99202-99215) by MDM or total time, with 99417, G2212 and G2211 rules.
NCCI Edit Checker
Enter 2 CPT or HCPCS codes to see if a Medicare NCCI PTP edit applies, the column order and the modifier indicator.
MUE Lookup
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Modifier 25 vs 59 Helper
Answer a few questions to pick modifier 25, 57, 59, XE, XS, XP or XU, with the CMS reason for each.
Patient Cost Estimator
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Latest guides
The newest denial code explainers and billing updates.
Why Is Aetna Medicare Denying J1010 Methylprednisolone With Nerve Block Codes?
CO-285 Denial Code (CARC 285) 2026: Appeal Procedures Not Followed
CO-283 Denial Code (CARC 283) 2026: Attending Provider Not Eligible to Direct Care
CO-282 Denial Code (CARC 282) 2026: Procedure or Revenue Code Inconsistent With Type of Bill
CO-281 Denial Code (CARC 281) 2026: Deductible Waived per Contractual Agreement
CO-284 Denial Code (CARC 284) 2026: Authorization Does Not Match the Billed Service
Popular denial codes
- CO-16: Claim Lacks Information or Has a Billing Error
- CO-45: Charge Exceeds Fee Schedule or Contracted Amount
- CO-50: Not Deemed a Medical Necessity by the Payer
- CO-4: Modifier Inconsistent or Missing – Fix
- CO-22: Care May Be Covered by Another Payer (Coordination of Benefits)
- CO-29: The Time Limit for Filing Has Expired
- OA-18: Exact Duplicate Claim or Service
- CO-197: Precertification or Authorization Absent
- CO-18: Duplicate Claim With a CO Group
- CO-252: An Attachment or Other Documentation Is Required
- PR-1, PR-2 and PR-3: Deductible, Coinsurance and Copay (Patient Responsibility)
- CO-96: Non-Covered Charges – Causes & Fix
Why Is Humana Denying 87811-QW and 87804-59-QW for Rapid COVID and Flu Tests?
An 87811 87804 modifier QW 59 denial from Humana usually means one combo test was split into separate codes. Since January 1,…
How Should a Lab Respond When a Payer Challenges Toxicology Code Bundling?
A toxicology bundling denial on G0483, 80307, or G0480 to G0482 usually means the payer folded your lab test into the treatment…
Why Is 33361 With Modifier 62 Denying for a Missing or Inconsistent Modifier?
A 33361 with modifier 62 denying for a missing or inconsistent modifier usually means Medicare also expected modifier Q0. For TAVR dates…
Why Is Blue Cross Denying ASC Nerve Block Codes as Bundled, Even With Modifier 59?
Nerve block ASC denials from Blue Cross usually mean the block code hit a bundling edit against the surgery. For 27447 with…
Has Anyone Successfully Gotten Paid for the 3rd Level of Nerve Blocks or RFAs?
Getting paid for the 3rd level of nerve blocks or RFA is rare under Medicare. Its billing articles treat a third level…
Why Is Aetna Denying an Office Visit (99213) When Billed With an X-Ray?
Aetna denying 99213 billed with an x-ray usually means the E/M line is missing modifier 25. Fix it by appending 99213-25 when…
Florida Medicaid VFC Vaccine Denials (CARC 16, M51, N111): Bill Two Lines per Vaccine
Florida Medicaid wants two codes for every vaccine you give. One is the vaccine product code. The other is the administration code,…
Got a Medical Bill Months (or a Year) Later? Timely Filing Rules and When You Don’t Have to Pay
Got a medical bill months after the visit? Resolve it in four steps before you pay. Ask the provider for the EOB…
ER Visit Denied by Insurance as “Not an Emergency”? The Prudent Layperson Rule and How to Appeal
To overturn an ER visit denied as “not an emergency,” work it in four steps. Get the EOB and note the denial…