CO-49 denial code: routine or preventive exam not covered
CO-49 is a claim adjustment reason code for a non-covered routine or preventive exam, or a diagnostic or screening procedure done with one. The fix depends on whether the service really met a covered preventive benefit or was a problem visit coded like a checkup.
Written by Salman Saeed, CEO and Co-Founder · Reviewed by a Certified Medical Coder · Last reviewed October 2026In short: CO-49 means the payer classed the visit, or a test done with it, as a routine or preventive exam that it does not cover. Check the remark code, compare the visit with the plan's or Medicare's preventive benefits, review the diagnosis pointers on the claim, and appeal only when the chart supports a covered purpose.
What does CO-49 mean?
X12 defines claim adjustment reason code (CARC) 49 as: "This is a non-covered service because it is a routine/preventive exam or a diagnostic/screening procedure done in conjunction with a routine/preventive exam." The usage note says to refer to the 835 Healthcare Policy Identification Segment (loop 2110 Service Payment Information REF), if present. The start date is 01/01/1995 and it was last modified on 07/01/2017.
Two things trigger it. One is the visit itself, billed as a routine or preventive exam. The other is a lab test, image or procedure billed alongside that visit and treated as part of the screening. The second one surprises practices, because the add-on service can have its own symptom-based diagnosis and still be pulled in.
X12 gives no note tying CARC 49 to one group code. Read it on the 835 before you decide who owes the balance.
Which remark codes come with CO-49?
| RARC | X12 wording | What it tells you |
|---|---|---|
| N567 | Not covered when considered preventative. | The plan or program does not pay for the preventive service as billed. |
| N429 | Not covered when considered routine. | The service was classed as routine, even if it was not a physical. |
| N130 | Consult plan benefit documents/guidelines for information about restrictions for this service. | The limit is written in the plan terms. Get the benefit language. |
| N425 | Statutorily excluded service(s). | Medicare or another program excludes it by law. No appeal on medical grounds will change that. |
Compare this with CO-50, where the payer accepts the service type but rejects medical necessity, and CO-204, where the plan does not include the benefit at all.
What does Medicare say about routine checkups?
Under 42 CFR 411.15(a)(1), Medicare excludes examinations performed for a purpose other than treatment or diagnosis of a specific illness, symptoms, complaint or injury. The same paragraph then lists exceptions, among them screening mammography, colorectal cancer screening tests, screening pelvic exams, prostate cancer screening tests, glaucoma screening exams, a screening electrocardiogram, initial preventive physical examinations and annual wellness visits.
So the Medicare question is whether the visit meets one of those named benefits. A general checkup that is not an initial preventive physical examination or an annual wellness visit falls outside them. A visit where the patient reports a symptom and the physician evaluates it is not an examination for a purpose other than diagnosis, but the claim has to show that.
Chapter 30 of the Claims Processing Manual, section 50.2.1, says an ABN is not required for care that is explicitly excluded by statute, though CMS strongly encourages one as a courtesy. It lists routine eye care, dental care and routine foot care as examples. Details are in ABN rules.
How do commercial plans treat preventive exams?
Under 45 CFR 147.130(a)(1), a group health plan or issuer must cover, with no copayment, coinsurance or deductible, evidence-based services rated A or B by the U.S. Preventive Services Task Force, routine immunizations recommended by the CDC's Advisory Committee on Immunization Practices, and preventive care and screenings in HRSA-supported guidelines for infants, children, adolescents and women. Grandfathered plans and other carve-outs are handled in the rest of that section.
So on a commercial claim, start from the plan's own preventive schedule. Then check how the diagnoses and the service lines were sequenced against the chart.
How do you fix a CO-49 denial?
How does CO-49 read on the remittance?
CO-49 is a coverage exclusion for routine or screening services. The remark (N567, N429, N130 or N425) shows the policy. Medicare's exclusion is in 42 CFR 411.15(a)(1), and for most commercial plans the preventive rule is 45 CFR 147.130(a)(1). Check the diagnosis and the code on the line to see which side of that rule the service falls.
A line returns CO-49 for $85.00 with RARC N567.
Where does CO-49 show up most?
It shows up in family medicine billing, internal medicine billing and OB-GYN billing, where well visits and screening are routine. Its neighbours are CO-55, CO-39 and CO-58. If these denials keep coming back, our denial management team can work them.
Related codes
- X12 claim adjustment reason codes list · X12
- X12 remittance advice remark codes list · X12
- X12 claim adjustment group codes list · X12
- 42 CFR 411.15, particular services excluded from coverage · eCFR
- 45 CFR 147.130, coverage of preventive health services · eCFR
- Medicare Claims Processing Manual, chapter 30, sections 20 and 50 · CMS
- Medicare Claims Processing Manual, chapter 29, section 310.2 · CMS
- Medicare Claims Processing Manual, chapter 22, sections 60.1 to 60.3 (group codes, CARC, RARC on the remittance) · CMS
We check every rule, code and deadline against the official source. See our editorial policy.
Common questions
Straight answers from the team that does the work.
Ask a billing lead directly. A 20-minute call, Monday to Friday, 9am to 5pm Eastern.
01Why is a screening visit denied as CO-49?
The payer treated the visit, or a service done with it, as a routine or preventive exam that its plan does not cover. Read the remark code and the plan's preventive schedule. For Medicare, only the benefits named in 42 CFR 411.15(a)(1) are covered, such as screening mammography and annual wellness visits.
02Can a lab billed with a checkup be denied as CO-49?
Yes. X12's wording covers a diagnostic or screening procedure done in conjunction with a routine or preventive exam. If the test was ordered for a symptom, the chart and the diagnosis pointer on the line must show that. Otherwise the payer may group it with the preventive visit.
03Does Medicare cover a routine physical?
Under 42 CFR 411.15(a)(1), Medicare excludes examinations done for a purpose other than treatment or diagnosis, with listed exceptions. Those include initial preventive physical examinations and annual wellness visits. A general checkup outside those benefits is excluded by regulation.
04Do I need an ABN for a service Medicare excludes by statute?
Not required. Chapter 30, section 50.2.1, says an ABN is not required for statutorily excluded care, though CMS strongly encourages one as a courtesy to forewarn the patient. If you give it that way, the patient is not asked to choose an option or sign.
05Is a CO-49 appealable?
It depends on the cause. If the service met a covered benefit and was coded wrongly, a corrected claim or an appeal can work. If the exclusion is statutory, no appeal on the merits will change it. Medicare redeterminations are due within 120 days of receipt of the notice.
Keep reading
Preventive visit denials?
We check the visit against the benefit, the coding against the chart, and appeal when the record supports it.