HCPCS code Q4230: Cogenex flowable amnion, per 0.5 cc2026 Medicare rate & RVUs in California

CMS doesn’t publish an office rate for Q4230 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 Q4230 covers

Q4230 identifies Cogenex flowable amnion as a product reported by volume. Each claim unit represents 0.5 cc, making the billed quantity a measure of product volume. This distinguishes Q4230 from Q4229, which identifies Cogenex amniotic membrane by surface area. For example, 1 cc of Cogenex flowable amnion corresponds to 2 Q4230 units. The code identifies the product quantity; CMS classifies it as technical-component-only, with interpretation covered by a separate code.

Medicare lists Q4230 as carrier priced (status C), meaning the Medicare Administrative Contractor sets payment for each claim. CMS assigns contractor pricing under the physician fee schedule and leaves coverage to the contractor's judgment. Thus, payment and coverage determinations are made by the contractor, while reported units reflect 0.5 cc each.

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 Q4230 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 Q4230 rate is calculated

Each of Q4230’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 Q4230

The CMS indicators that decide how Q4230 is paid alongside other services.

Q4230 compared with similar codes

How to choose

Q4229Amniotic membraneCogenex, per square centimeter

Q4230 identifies Cogenex flowable amnion measured by volume; Q4229 identifies Cogenex amniotic membrane measured by surface area.

Q4233Surfactor or NudynPer 0.5 cc

Both codes use 0.5 cc units, but Q4233 identifies Surfactor or Nudyn rather than Cogenex flowable amnion.

Q4242Amniocyte PlusPer 0.5 cc

Q4242 identifies Amniocyte Plus. Q4230 identifies Cogenex flowable amnion.

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