HCPCS code C1849 – Synthetic resorbable skin substitute

Key takeaways

HCPCS code C1849 described a skin substitute that is synthetic and resorbable, reported per square centimeter in hospital outpatient and ASC settings.

CMS added C1849 on July 1, 2020, and terminated it on December 31, 2022.

C1849 is a deleted code and has not been billable for any date of service since January 1, 2023. AAPC and CMS-derived HCPCS data agree on this.

Bill the product-specific code for the skin substitute you applied, often a Q-code, confirmed in the current CMS HCPCS annual update file.

Pabau’s claims management software tracks each skin substitute claim through its status stages, so a line carrying a deleted code gets caught early.

HCPCS code C1849: Definition and official descriptor

HCPCS code C1849 was defined by the Centers for Medicare and Medicaid Services (CMS) as: Skin substitute, synthetic, resorbable, per square centimeter. CMS terminated the code on December 31, 2022, so it now serves only as a historical reference.

Each word in the descriptor set a boundary. Synthetic meant the product contained no human or animal tissue. Resorbable meant the body absorbed the material over time, so it did not need surgical removal. Per square centimeter set how quantity was reported on the claim.

The code sat in the C-series of HCPCS Level II. CMS uses C-codes for reporting in hospital outpatient and ambulatory surgical center (ASC) settings under the outpatient prospective payment system. HCPCS Level II is the HIPAA-mandated code set for supplies, drugs and devices, maintained by CMS.

Is C1849 still valid? Code status and the 2023 deletion

No, HCPCS code C1849 is no longer valid. CMS terminated it on December 31, 2022, so no claim with a 2023 or later date of service can carry it.

The code had a short life. CMS added it to HCPCS Level II on July 1, 2020, and it stayed reportable for two and a half years. Its CMS record now shows action code N, meaning no further maintenance, alongside the termination date. The timeline below shows which code applies on each side of that cutoff.

Coding references agree on the deletion. The AAPC HCPCS reference lists C1849 as a deleted code, effective January 1, 2023. Lookup sites that republish the CMS HCPCS file show the same December 31, 2022 termination date.

A lookup page headed “2026 HCPCS Code C1849” can look like an active listing. That year is only the site’s current data-year heading, and the record beneath it still reads as terminated. Check the termination date field, not the page title.

Replacement code: What to bill instead of C1849

Bill the product-specific HCPCS code assigned to the skin substitute you applied. CMS named no single one-to-one replacement for C1849, so the right code depends on the product.

Most skin substitutes now carry their own Q-code in the Q4 series. Apligraf, for example, is billed under Q4101, and EpiFix under Q4186. Some synthetic products have A-codes instead. Restrata, for example, has been reported under A2007, per square centimeter, since January 1, 2022.

1. Record the exact product name and manufacturer from the procedure note.
2. Look up that product’s code in the current CMS HCPCS annual update file, linked from the CMS HCPCS overview page.
3. Read the new code’s descriptor for its unit of measure before you set the claim quantity.
4. Check the applicable MAC Local Coverage Determination (LCD) and billing article for that code.
5. Update your charge master and documentation templates, so staff stop reaching for C1849.

If you cannot find a product-specific code, ask the manufacturer which code CMS assigned and confirm it with your Medicare Administrative Contractor (MAC). Do not fall back on C1849, because a deleted code denies on submission.

How C1849 was billed: Units and quantity reporting

While it was active, C1849 was billed per square centimeter, not per package, sheet or product unit. Most skin substitute codes that replaced it work the same way, so the measurement habits still matter.

To set the quantity, the coder took the square centimeters documented in the procedure note. A 4 cm x 3 cm application, for example, became 12 units on the claim. MACs compare documented measurements with submitted quantities during claim review.

The product line is only half of the claim. The application is reported separately with a CPT code such as 15271, which covers the first 25 sq cm on the trunk, arms or legs.

• Measure before application: document wound length x width in the procedure note.
• Report whole units: follow the rounding rule in the current code’s descriptor and your MAC billing article.
• Match the claim quantity to the record: a quantity the chart does not support is an audit flag.
• Record discarded product: check your MAC’s current rules on wastage modifiers before you bill any unused amount.
• Keep the product lot number in the record: MACs often ask for it during post-payment review.

Medicare coverage for skin substitutes after C1849

Medicare coverage now attaches to the product-specific code, not to C1849. Coverage is governed by national guidance and by MAC-issued LCDs, which vary by jurisdiction. Verify the applicable LCD for your MAC region before billing.

Coverage criteria for skin substitutes typically require a qualifying wound type and documented failure of conservative treatment. The product itself must also meet CMS eligibility criteria.

Supported ICD-10 diagnosis codes

The diagnosis codes that support medical necessity for a skin substitute application are wound-type specific. Common ICD-10-CM codes accepted under skin substitute LCDs include:

The covered diagnosis codes vary by MAC LCD. Cross-reference them against the LCD in effect for your jurisdiction, available through the CMS Medicare Coverage Database. A diabetic foot ulcer claim, for example, pairs E11.621 with an L97 code for the ulcer’s site and severity.

Prior authorization requirements

Prior authorization for a skin substitute depends on the payer and the product code. Medicare Advantage plans and commercial payers frequently require it. Check each payer’s policy and the applicable MAC LCD before the application.

Record the prior authorization number on the claim when you obtain one. An authorization issued against C1849 is not valid for a current date of service, so request it under the product-specific code.

Documentation requirements for skin substitute claims

Incomplete documentation is one of the most common reasons skin substitute claims deny. The medical record must support medical necessity and identify the exact product used. Wound care teams benefit from structured templates that capture each required element at the point of care.

• Wound measurements: length x width, and depth where applicable, at each treatment date.
• Wound type and duration: a clinical description matching the supporting ICD-10-CM diagnosis code.
• Conservative care history: evidence that standard wound care was tried and was insufficient.
• Product name and manufacturer: the exact product name, which decides the HCPCS code.
• Lot number: requested by most MACs during post-payment review.
• Procedure note: the application technique, wound preparation and product placement.
• Qualifying diagnosis: an ICD-10-CM code supported by findings in that visit’s notes.

Your MAC’s LCD may add requirements, such as a minimum period of prior wound care or a minimum wound area. Review it before each claim.

C1849 vs. related skin substitute HCPCS codes

HCPCS code C1849 is often confused with the product-specific skin substitute codes that are billed today. Each category follows its own coverage rules and payment pathway. Our HCPCS code library covers many of the individual Q4 products.

The rule for current claims is simple. Find the code CMS assigned to the named product, and bill that code. C1849 is not a catch-all for synthetic products without their own code.

Why C1849 claims get denied and how to fix them

Any claim carrying C1849 for a date of service on or after January 1, 2023 denies because the code is invalid. Running submissions through status-tracking claims management shows whether that error is still reaching payers.

The other denial patterns below now apply to the product-specific codes that replaced C1849.

Before you build an appeal, confirm the code’s status in a lookup tool such as the PGM Billing HCPCS lookup tool. An appeal for a C1849 line on a 2023 or later date of service will not succeed, so correct the code instead.

How Pabau supports skin substitute billing after C1849

Deleted codes like C1849 survive in charge masters, saved templates and staff habits long after CMS retires them. Each one that slips through costs a denial, a correction and a resubmission.

Pabau, the practice management and billing platform we build, keeps the clinical record and the claim in one place. Procedure notes capture the product name, lot number and wound measurements at the point of care. Coders then set the product code and quantity from that record.

Claims are tracked through every status stage, so a billing lead can see where a skin substitute claim stalls. That makes an outdated code visible in days rather than at month-end reconciliation.

Keep deleted codes off your skin substitute claims

Pabau’s claims management software gives billing teams a clear view of claim status, so outdated codes get caught before they cost you a resubmission.

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Conclusion

C1849 is a closed chapter. The code has been invalid since January 1, 2023, and any lookup page that suggests otherwise is showing a data-year heading.

The work that remains is housekeeping with a payoff. Strip C1849 from every template, bill the code assigned to the named product, and keep measurements and lot numbers in the note. Practices that do this stop paying for avoidable resubmissions.

Book a demo to see how Pabau helps wound care billing teams catch outdated codes and keep skin substitute claims clean.

Continue your research

Billing a biologic skin substitute today? HCPCS code Q4162 is a skin substitute billing guide for one of the product-specific Q4 codes.

Applying a porcine bladder matrix? HCPCS code Q4166 covers how Cytal is coded and billed per square centimeter.

Want another product-specific example? HCPCS code Q4133 walks through billing for another skin substitute with its own code.

Grafting a larger wound? CPT code 15273 covers skin substitute application of 100 sq cm or more on the trunk, arms or legs.

Debriding the wound before the graft? CPT code 97597 explains how active wound care management is billed.

Frequently asked questions