HCPCS code Q4240: Corecyte, topical, per 0.5 cc2026 Medicare rate & RVUs in California

CMS doesn’t publish an office rate for Q4240 in California.

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What Q4240 covers

Q4240 identifies Corecyte supplied for topical use. The code measures the product by volume: each unit represents 0.5 cc. A 1 cc quantity therefore corresponds to 2 units. This differs from nearby product codes that identify other named products or use a different billing measure. The product name and 0.5 cc unit distinguish Q4240 from topical Polycyte and from Coretext or Protext, which are measured per cc.

Medicare assigns Q4240 status C, or carrier priced: it has no national physician fee schedule payment amount, and the Medicare Administrative Contractor prices each claim under the physician fee schedule. The contractor determines coverage. CMS classifies the code as technical-component-only, with a separate code covering interpretation.

This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.

Where Q4240 pays more and less in California

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

29 of 29 payment localities

How the Q4240 rate is calculated

Each of Q4240’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.

Payment rules and modifiers for Q4240

The CMS indicators that decide how Q4240 is paid alongside other services.

Q4240 compared with similar codes

How to choose

Q4241PolycyteTopical, per 0.5 cc

Q4240 identifies Corecyte, while Q4241 identifies Polycyte. Both are designated for topical use and measured per 0.5 cc.

Q4242Amniocyte PlusPer 0.5 cc

Q4242 identifies Amniocyte Plus rather than Corecyte. Both use a 0.5 cc unit.

Q4246Coretext or ProtextPer cubic centimeter

Q4246 identifies Coretext or Protext and is measured per cc. Q4240 identifies Corecyte and is measured per 0.5 cc.

Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.

CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027

Open CMS sourceHow we calculate rates