CPT Code 19305: Radical mastectomy billing, modifiers & reimbursement

Key takeaways

CPT Code 19305 describes a radical (Halsted) mastectomy: en bloc removal of the breast, both pectoral muscles, and level I-III axillary lymph nodes.

The procedure is rarely performed today. Most surgeons use the modified radical mastectomy, CPT 19307, which preserves the pectoralis major.

Apply laterality modifier LT or RT on every claim. Never bill modifier 50 for a bilateral radical mastectomy.

Total RVU for 19305 is 32.83, which works out to roughly $1,096.55 at the national Medicare rate.

Practice management software like Pabau helps surgical practices document, track, and submit 19305 claims with the operative report data payers ask for.

CPT Code 19305 is the billing code for a radical mastectomy, also known as the Halsted procedure. It covers en bloc removal of the entire breast, the pectoralis major, the pectoralis minor, and all level I through level III axillary lymph nodes. Nothing less qualifies, and anything more belongs to a different code.

The American Medical Association (AMA) publishes the official descriptor as Mastectomy, radical, including pectoral muscles, axillary lymph nodes. That single line fixes the procedure’s anatomical scope. It is also the line a payer reads your operative note against.

The Halsted technique was first described in 1894. It dominated breast cancer surgery for nearly 80 years, until clinical trials showed that modified procedures achieved the same oncologic outcomes with far less morbidity.

The code is still billable when documented correctly. Coders at plastic surgery practices and surgical oncology teams should understand that history before selecting it.

What the code includes

CPT 19305 sits in the 19300-19499 breast procedure range of the CPT codebook. Accurate documentation starts with knowing exactly which structures the code requires.

The en bloc requirement is what separates CPT 19305 from the codes next to it. If the operative report documents pectoral muscle preservation, the correct code is 19307. Choosing 19305 when the muscles were preserved is a billing error that creates audit exposure. Payers cross-reference the operative note against the code you selected, and that mismatch is one of the most common denial triggers in this family.

When is CPT 19305 used?

CPT 19305 applies when tumor extends directly into the pectoralis major, which makes muscle-sparing surgery oncologically inappropriate. That scenario is uncommon in contemporary breast cancer care. Most patients present at a stage where modified radical or simple mastectomy achieves adequate margins.

Payers require documented medical necessity. The operative report has to state why the radical approach was chosen over the muscle-preserving 19307. Vague language such as “extensive disease” is not enough. The note must specify tumor invasion of the pectoralis fascia or muscle, confirmed by intraoperative findings or pre-operative imaging.

• Direct pectoral muscle invasion: The primary indication. Tumor has breached the pectoralis fascia and invaded the underlying muscle.
• Locally advanced breast cancer: Cases where prior treatments have failed and muscle involvement is confirmed.
• Historical documentation: Practices coding legacy cases, or cases performed where advanced imaging was unavailable.
• Atypical tumor presentations: Rare cases involving phyllodes tumors or sarcomas with direct muscle extension.

Practices that bill oncology work often use claims management software to attach supporting documentation to the claim before submission. That way the payer has the operative note in hand instead of requesting records weeks later.

How 19305 compares to the other mastectomy codes

Choosing the wrong mastectomy code is one of the top denial reasons in breast surgery billing. The 19300-19307 range runs from partial resection through to radical removal. The code you pick has to match the anatomical scope the surgeon documented. The table below shows the differences that decide it.

The distinction coders meet most often is 19305 versus 19307. Both include an axillary dissection, so the deciding factor is the pectoralis major. If the note says that muscle was preserved and intact, the claim belongs under 19307. CPT 19306 sits above 19305 rather than below it, adding the internal mammary nodes to the same muscle resection.

Breast work that stops short of a full mastectomy leaves the range entirely. A lumpectomy with node dissection is 19302, a percutaneous biopsy add-on is 19084, and cryoablation of a fibroadenoma is 19105. None of them can stand in for a mastectomy line.

Practices handling breast oncology regularly can use digital intake and documentation forms to capture surgical detail at the point of care. Downstream coding gets more reliable when the laterality and the muscle findings are already on file.

Modifiers for CPT 19305

Modifier choice on a 19305 claim affects both reimbursement and acceptance. Mastectomy is unilateral by definition, so laterality modifiers are the ones you need most often. Using the wrong one, or leaving it off, is a leading cause of automatic rejection.

The modifier 50 caution is worth emphasizing. Bilateral radical mastectomy is exceptionally rare. When it does happen, most payers want two separate claim lines rather than one line with modifier 50. Put LT on the first and RT on the second. Confirm the payer’s bilateral policy before you submit, since NCCI edits and local coverage determinations govern the accepted format.

ICD-10 codes used with CPT 19305

Every 19305 claim needs a supporting ICD-10-CM diagnosis code that establishes medical necessity. The C50 family, malignant neoplasm of breast, is the primary pairing for this procedure.

Quadrant-specific codes such as C50.411 carry more weight than an unspecified-site code. Coders at oncology and women’s health practices should also confirm that the codes match the current ICD-10-CM fiscal year edition.

Always use the most specific C50 subcategory the documentation supports. Unspecified quadrant codes are valid when the tumor location was not documented, but ICD-10-CM guidelines require coding to the highest specificity available.

Laterality in the diagnosis must match the laterality modifier on the CPT line. A mismatch, such as C50.912 paired with modifier RT, will trigger an edit. You can verify current codes with the CDC/NCHS ICD-10-CM web tool.

Reimbursement for CPT 19305

Medicare pays for CPT 19305 through the Resource-Based Relative Value Scale (RBRVS). Total payment is the sum of three RVU components, multiplied by the annual conversion factor and adjusted for the geographic practice cost index (GPCI).

The figures below are national averages, and actual payment varies by Medicare Administrative Contractor (MAC) locality. Verify current-year figures in the CMS Physician Fee Schedule lookup.

CPT 19305 carries a 90-day global surgical period. Post-operative visits inside those 90 days are bundled into the surgical fee, so billing routine follow-up separately will be denied. Complications, unrelated conditions, and services clearly outside the global package can still be billed.

They need supporting documentation and the right modifier, such as modifier 24 for an unrelated evaluation and management visit. Software that tracks the global period automatically will flag bundling conflicts before submission.

Co-billed procedures and bundling

CPT 19305 already includes the axillary lymph node dissection. That bundling decides what you can and cannot report separately on the same claim. Getting it wrong produces National Correct Coding Initiative (NCCI) edit denials, which then need an appeal with documentation attached. Billing teams meet these edits most often when a sentinel node procedure runs in the same session.

The NCCI edit landscape for mastectomy codes changes quarterly. What is separately reportable in one calendar quarter may be bundled in the next. Subscribe to CMS NCCI update notifications, or use a billing platform that keeps current edit tables built in.

When 38900 and 38792 are performed in the same session as 19305, their reportable status turns on two questions. Was the service rendered by a different provider? Does the documentation support the distinction on medical necessity grounds?

Immediate reconstruction is coded on its own line, so a tissue expander placement is billed as 19357. Later complications such as capsular contracture generate their own claims well outside the global period.

Documentation that supports the claim

The operative report is the foundation of every 19305 claim. This is a high-value code attached to a clinically uncommon procedure. Payers read the documentation more closely than they do for routine work.

A claim missing any of the elements below risks denial or post-payment recovery. Plastic surgery practice software can standardize operative report templates and attach documentation at submission.

• Confirmed tumor-muscle involvement: State explicitly that the pectoralis major or minor was invaded by tumor. Reference pre-operative imaging or intraoperative frozen section results.
• En bloc resection confirmation: Document that the breast, both pectoral muscles, and axillary contents came out as a single specimen.
• Lymph node levels dissected: Specify level I, II, and III dissection. Incomplete documentation of the levels billed supports a downcode to 19307.
• Laterality documentation: State left or right clearly in the operative note and on the face sheet, matching the LT or RT modifier.
• Medical necessity rationale: Explain why a modified radical mastectomy was not appropriate here. This is the element payers most often find missing.
• Pathology correlation: A final pathology report confirming malignancy supports the ICD-10-CM C50 diagnosis code on the claim.

Auditors work at the level of individual phrases, not whole reports. “Pectoralis major spared” or “pectoralis major dissected free” reads as 19307 to a reviewer. That holds even when the surgeon resected the muscle later in the case. Dictate the resection in the same sentence as the specimen description, and the note supports the code you billed.

Practices using compliance management software can build these checks into the operative note workflow, prompting surgeons to capture each element before closing the report. That beats a post-hoc audit once a denial has already landed.

The AAPC CPT reference carries further guidance on the mastectomy family and its bundling rules.

How Pabau supports surgical billing workflows

Billing 19305 accurately means keeping four documents in step: the surgical note, the operative report, the pathology findings, and the claim form. In most practices those live in different systems, and every handoff is a chance for a denial, a delay, or an audit finding.

Pabau keeps that chain in one place. Operative notes attach directly to the claim line, global period windows are tracked for you, and NCCI conflicts get flagged before anything is submitted. Your coders stop chasing paperwork across systems and start submitting claims that go through first time.

Practices that run breast oncology and reconstructive cases alongside routine clinical volume feel that most. Surgical billing follows a different rhythm to encounter billing. Practice management software that separates the two stops a 90-day global period from swallowing revenue you were entitled to bill.

Streamline surgical billing documentation

Pabau helps surgical oncology and plastic surgery practices manage claims, attach operative documentation, and track global periods. Fewer denials, and less time spent rebuilding a claim after the fact.

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Conclusion

Almost every mastectomy claim that lands on your desk belongs under 19307, not 19305. Treat 19305 as the exception you have to argue for. If the operative note does not say the pectoralis major came out with the specimen, the code is wrong and the downcode is coming.

So the work happens before the claim, in how the surgeon dictates. Get the muscle resection, the node levels, and the laterality into the note as a matter of routine. The rare 19305 case then pays without an appeal. Leave it to memory and you will be rebuilding the record months later, under audit.

That habit is easier to keep when the template prompts for it. Book a demo to see how Pabau ties operative documentation to the claim for surgical practices.

Continue your research

Billing the reconstruction that follows the cancer surgery? CPT code 19380 sets out the documentation rules for revising a reconstructed breast.

Excising a lesion rather than the whole breast? CPT code 19125 explains breast lesion excision with a radiological marker in place.

Need the anesthesia line for the same session? CPT code 00404 covers anesthesia for radical mastectomy procedures and how its units are calculated.

Tightening documentation without adding admin hours? HIPAA compliant AI tools reviews the tools that draft clinical notes while keeping patient data protected.

Frequently asked questions