Fructosamine Test Cost and Medicare Coverage (CPT 82985)

Also called: glycated protein · glycosylated protein — all the same test, CPT 82985.

The short answer

Covered for managing diabetes that has already been diagnosed, mostly when an A1c cannot be trusted. Medicare’s national policy (NCD 190.21, the same in every state) governs both the A1c and its lesser-known relative, glycated protein, which the policy says is the same thing as fructosamine. The policy’s words: “Glycated protein testing may be used in place of glycated hemoglobin in the management of diabetic patients, and is particularly useful in patients who have abnormalities of erythrocytes such as hemolytic anemia or hemoglobinopathies.”

The difference is the window. The policy says an A1c reflects blood sugar control over “4-8 weeks” and fructosamine over “1-2 weeks”; Labcorp and Quest both describe the fructosamine window as one to three weeks. That short window, plus the fact that it does not depend on hemoglobin, is why it exists.

Three things trip claims for this test: ordering it and an A1c together more than once, ordering it to diagnose diabetes (the policy says neither test is covered for that), and ordering it more than monthly in pregnancy. The hemoglobin A1c test has its own page under the same policy.

When Medicare DOES cover it

The national policy’s covered picture, in plain English:

• In place of an A1c, to manage diabetes. The policy names “hemolytic anemia or hemoglobinopathies” as the situations where it is “particularly useful,” both of them “abnormalities of erythrocytes,” the red blood cells that carry the hemoglobin an A1c is measured on.
• When a hemoglobin variant interferes with the A1c. The policy explains that “many methods for the analysis of glycated hemoglobin show significant interference from elevated levels of fetal hemoglobin or by variant hemoglobin molecules,” and that “alternative testing, including glycated protein, for example, fructosamine, may be indicated.”
• Once alongside the A1c, then on its own. Because the problem with the A1c often shows up only when it is run, the policy accepts that “a patient will have both a glycated hemoglobin and glycated protein ordered on the same day.” Its rule: “This should be limited to the initial assay of glycated hemoglobin, with subsequent exclusive use of glycated protein.”
• Monthly in diabetic pregnancy. “It may be reasonable and necessary to monitor glycated protein monthly in pregnant diabetic women.”
• More often for uncontrolled diabetes, with documentation. The policy says testing for uncontrolled type 1 or type 2 diabetes “may require testing more than four times a year” when the record supports it.

If one of these genuinely describes your situation, the diagnosis for it belongs on your doctor’s order, and coverage follows.

When Medicare does NOT cover it

• To diagnose diabetes. The policy is direct: “These tests are not considered to be medically necessary for the diagnosis of diabetes.” Medicare’s separate diabetes screening benefit is built around A1c screenings; see the A1c page for how that works.
• Fructosamine and A1c together, again and again. After the initial A1c, the policy expects “subsequent exclusive use of glycated protein.” A standing order that runs both every visit is asking Medicare to pay for a test its own policy says should have been dropped.
• More than once a month in pregnancy. The policy’s limitation says glycated protein is not reasonable and necessary “more frequently than once a month for diabetic pregnant women.”

One note on frequency: the policy’s familiar “not more often than every 3 months” sentence names glycated hemoglobin, not glycated protein, and the policy sets no numeric frequency for fructosamine outside pregnancy. Coverage outside pregnancy rests on the reason for the test rather than on a calendar rule.

(Never ask anyone to change a code just to get coverage; that is fraud. But doctors often have a legitimate reason for the test that simply wasn’t written down.)

What you pay if it IS covered: $0

Covered lab tests cost Medicare patients nothing, with no deductible and no 20% coinsurance. Medicare pays the lab $16.76 for a fructosamine test, and you owe zero.

What you pay if it is NOT covered, read this before you sign

Quest’s own test directory flags fructosamine as “subject to a Medicare Limited Coverage Policy” that “may require a signed ABN when ordering.” (Labcorp’s page and Cleveland Clinic Laboratories’ catalog entry carry no such notice.) If fructosamine is on your order without a diabetes diagnosis, or next to an A1c for the second time, expect the Advance Beneficiary Notice (ABN), the signature pad, committing you to the lab’s own billing rates if Medicare denies the claim. Before you sign:

1. Ask the lab to print exactly what you would owe. You’re entitled to see the number in black and white first. For perspective: when Medicare covers this exact test, it pays the lab $16.76.
2. Ask whether an A1c is on the same order. If it is, and this is not the first time, ask your doctor which one is meant to continue; the policy expects one or the other after the initial pair.
3. Know the direct prices in the table above. Fewer sellers carry this test than carry an A1c: Quest’s consumer site, Labcorp OnDemand, and Personalabs do not sell it at all, and Jason Health, usually the cheapest, lists it at $60 (jasonhealth.com, plus their flat $18 lab-collection fee per order). Same certified labs, same blood draw.

Before you sign the pad, 60-second checklist

1. Ask: “Can you print what I’ll owe if Medicare doesn’t pay?”
2. Ask your doctor: “Is this replacing my A1c because of a blood condition or a hemoglobin variant, and is that on the order?”
3. Compare the printed price to the direct-purchase prices before deciding how to proceed.

What counts as a “normal” fructosamine level

Start with the range printed on your own report. This is a test the consumer health sites skip: neither MedlinePlus nor Cleveland Clinic has a page on fructosamine, so the ranges below come from the laboratories themselves.

• Labcorp’s reference interval is 205 to 285 umol/L, described as the range for healthy subjects age 20 to 60. Its directory also reports what it sees in poorly controlled diabetics: 228 to 563 umol/L, with a mean of 396.
• Quest’s reference range is 205 to 285 umol/L.
• Cleveland Clinic Laboratories prints the same 205 to 285 umol/L.

None of the sources we checked gives a treatment target for fructosamine the way the ADA does for A1c, so there is no “clinical target” to add here. Cleveland Clinic Laboratories notes that results are affected by altered blood protein levels, and says fructosamine should not replace the A1c except where interfering hemoglobin variants are present, which is also how Medicare’s policy frames it.

(Where lab ranges and “optimal” ranges come from, and who decides.)

This page can tell you where those numbers came from. It cannot tell you what yours means; that reading belongs to your doctor, alongside your A1c history and your other results.

Quick questions people ask

What is a fructosamine test? A blood test that measures glycated protein. Medicare’s policy says “fructosamine or glycated protein refers to glycosylated protein present in a serum or plasma sample.” Labcorp describes its use as evaluating diabetic control “over a shorter time period (one to three weeks) than that represented by hemoglobin A1c.” On billing paperwork it is CPT code 82985.

Fructosamine vs A1c: what is the difference? The window and the material. An A1c is measured on hemoglobin and, per Medicare’s policy, reflects the past 4 to 8 weeks; fructosamine is measured on serum protein and reflects the past 1 to 2 weeks (Medicare) or 1 to 3 weeks (Labcorp and Quest). Cleveland Clinic Laboratories calls it “an useful alternative indicator of glycemic control in conditions in which HbA1c measurement is unreliable and for identifying impaired blood glucose control prior to noticeable changes in HbA1c.”

Can fructosamine replace my A1c entirely? Under Medicare’s policy, yes, once the initial A1c has been run and the reason (a hemoglobin variant, hemolytic anemia) is established; the policy then expects “subsequent exclusive use of glycated protein.” Cleveland Clinic Laboratories says it should not replace the A1c except when interfering hemoglobin variants are present. Labcorp also lists it as useful for children with type 1 diabetes. Which applies to you is your doctor’s call.

Do you have to fast for a fructosamine test? Quest’s directory lists no preparation and Labcorp’s page has no fasting note. Cleveland Clinic Laboratories asks that you avoid vitamin C (ascorbic acid) for 24 hours before the draw. If your order does not say, ask before the day. Our fasting guide explains what fasting means and what you can still drink.

Sources and data dates

Medicare payment amount: CMS Clinical Laboratory Fee Schedule, 2026 Q3 file (national rate). Coverage rules: CMS Medicare Coverage Database, NCD 190.21 (Glycated Hemoglobin/Glycated Protein), a national policy identical in every state, and the same text in the NCD Manual, Chapter 1, Part 3. Test descriptions, preparation, and ranges: Labcorp test 100800, Quest test 8340, and the Cleveland Clinic Laboratories test catalog; MedlinePlus and Cleveland Clinic’s consumer site have no fructosamine page. Consumer prices checked September 2026. Information current as of the date shown above; coverage is always determined by Medicare when your claim is processed.

ClaraCover provides information, not medical, billing, or insurance advice. Talk to your doctor about what tests you need.