CPT code 44205 – Laparoscopic partial colectomy with terminal ileum removal

Key takeaways

CPT code 44205 needs four elements in the op note: a laparoscopic approach, a partial colectomy, terminal ileum removal, and an ileocolostomy.

Terminal ileum removal separates 44205 from 44204, and the ileum-to-colon join separates it from the colon-to-rectum join of 44207.

A case converted to open surgery moves to 44160, the open equivalent of this procedure.

Medicare gives 44205 a 90-day global period, so routine follow-up visits are bundled unless modifier -24, -78, or -79 applies.

Most commercial payers want prior authorization for an elective 44205, while traditional Medicare does not require it.

What CPT code 44205 covers, word by word

CPT code 44205 reports a laparoscopic partial colectomy that removes the terminal ileum and joins the ileum to the remaining colon. Surgeons often call it a laparoscopic right hemicolectomy.

The official descriptor from the American Medical Association reads: Laparoscopy, surgical; colectomy, partial, with removal of terminal ileum with ileocolostomy.

Each phrase in that descriptor works as a billing condition. Here’s what each one asks the op note to show:

• Laparoscopy, surgical: the resection and anastomosis were done laparoscopically, without conversion to open.
• Colectomy, partial: a segment of colon came out, not the whole colon.
• Removal of terminal ileum: the end of the small bowel was resected with the colon segment.
• Ileocolostomy: the surgeon joined the ileum to the remaining colon.

The quick reference below pulls the code’s key facts into one place.

44205, 44204 or 44207? The resection and the join decide

The laparoscopic excision family for the intestines runs from 44202 to 44213. It covers small bowel resections (44202, 44203), partial colectomies (44204-44208), and total colectomies with a splenic flexure add-on (44210-44213).

Within the partial colectomy codes, two facts pick the code. The first is whether the terminal ileum came out. The second is how the surgeon rebuilt the bowel. Because each code carries a different relative value, payers audit this family closely.

The table compares the five partial colectomy codes side by side.

The 44204 vs 44205 decision point: start with what the op note describes. If the right colon and terminal ileum came out together, with the ileum joined to the colon, that’s 44205. If the resection stops at the ileocecal valve and leaves the terminal ileum in place, report 44204 instead.

The wording matters here. A note that only says “right hemicolectomy” doesn’t confirm the ileum resection or the anastomosis type. In that case, the coder can’t assign 44205 without first querying the surgeon. The diagram below walks through the same decision in three questions.

A conversion to open surgery switches the code to 44160

Sometimes a case starts laparoscopically and finishes open. When that happens, drop 44205 and report the open equivalent, 44160. Billing 44205 for a case that ended open is an audit trigger. So the op note needs to state the approach used for the resection and anastomosis, not just for port placement.

The op note must spell out four details to support 44205

Payers reviewing a 44205 claim look for four details in the operative report. If one is missing, expect a denial or a downcode to 44204.

• Laparoscopic approach confirmed: the note describes port placement, camera introduction, and laparoscopic dissection. A report that skips from prep to specimen removal doesn’t confirm the approach.
• Colon segment named: the note names the segment removed, such as the right colon or transverse colon. “Partial colectomy” on its own won’t satisfy a medical necessity review.
• Terminal ileum resection stated: the surgeon records that the terminal ileum was part of the specimen. A pathology report can back this up, but it can’t replace the surgeon’s own documentation.
• Ileocolostomy described: the note records the anastomosis type (end-to-end, side-to-side, or end-to-side) and the technique (stapled or hand-sewn). Surgeons leave out the technique more often than any other detail.

Here’s how that plays out on paper. “Laparoscopic right hemicolectomy” alone is too thin to code. By contrast, “laparoscopic resection of the right colon and terminal ileum, with stapled side-to-side ileocolic anastomosis” supports 44205 without a query.

Ideally, the coder checks all four details against the note before charge entry. That way, the superbill matches the op note from the start.

Diagnoses that support medical necessity for 44205

Medical necessity for 44205 depends on a diagnosis that justifies removing both colon and terminal ileum. The diagnosis must appear in the patient record.

It should also be as specific as the operative findings allow. A generic colorectal code, used when the findings point somewhere more specific, invites a medical necessity review.

For pairings outside this list, a CPT-to-ICD-10 crosswalk tool helps confirm the diagnosis fits the surgical scope of 44205. You can also check exact codes and titles in the full ICD-10-CM code list.

Modifiers on a 44205 claim need backup in the op note

Modifier choice for 44205 follows the National Correct Coding Initiative (NCCI) edits published by CMS. These edits decide which codes can be billed alongside 44205.

They also set which modifiers can override a bundling edit. A wrong or missing modifier leads to an automatic denial or an audit finding.

Modifier -22 draws audits. Payers that receive 44205 with -22 routinely ask for the operative report. So quantify the extra work where you can, for example “procedure extended by 90 minutes due to dense adhesions from prior appendectomy.” A vague -22 note can create False Claims Act exposure if the payer decides the complexity wasn’t increased.

The 90-day global period bundles routine follow-up

CPT code 44205 carries a 90-day global surgical period. Routine postoperative care from the day of surgery through day 90 is part of the surgical payment. That means you can’t bill separate E/M visits for normal recovery.

Three modifiers allow separate billing inside the global window:

• Modifier -24: an unrelated E/M visit during the postoperative period, such as a new cardiovascular complaint on day 30.
• Modifier -79: an unrelated surgical procedure performed in the global window.
• Modifier -78: a return to the operating room for a complication of the original procedure. Payment is reduced, and the complication stays part of the global package.

Medicare pays 44205 by RVU and locality

Medicare sets 44205 payment through the Physician Fee Schedule, which you can search with the CMS Physician Fee Schedule lookup tool. Rates differ for facility and non-facility settings. Geographic practice cost indices (GPCIs) then adjust the payment in each MAC region.

It’s worth rechecking the rate every January, when the new fee schedule takes effect. The figures below are approximate starting points.

For exact current-year values with your locality applied, use FastRVU’s lookup tool. RVUs and the conversion factor change each year with the final rule. As a result, figures in older coding references may no longer hold.

Most commercial plans want prior authorization for 44205

Most commercial payers require prior authorization (PA) for an elective laparoscopic colectomy. Traditional Medicare doesn’t require PA for 44205. It does, however, review medical necessity in post-payment audits. Rules still vary by payer and plan year, so check each plan separately.

A commercial PA request for 44205 usually needs:

• a confirmed diagnosis, backed by imaging or endoscopy reports
• evidence that conservative treatment failed or wasn’t appropriate
• the surgeon’s operative plan, including the expected approach and anastomosis type

Build the PA check into your eligibility verification before surgery is booked. A missing PA is one of the easiest colectomy denials to prevent.

Emergency cases work differently. When PA can’t be obtained in advance, most payers accept a retrospective request if the record documents the emergency.

Flag these cases for the billing team on the day of surgery. Payer deadlines for the retrospective request commonly fall 24 to 72 hours after the procedure.

How a 44205 claim moves from surgery to payment

Knowing the claim’s path makes it easier to spot where a 44205 claim stalls. A typical surgeon’s claim moves through five steps:

1. Op note signed: the surgeon finalizes the operative report.
2. Coding: the coder reads the note, assigns 44205, adds any modifiers, and links the ICD-10 diagnosis.
3. Charge entry: billing staff enter the charge on a CMS-1500 or 837P claim, along with the PA number.
4. Clearinghouse: the clearinghouse checks the claim format and forwards it to the payer.
5. Payer decision: the payer pays or denies the claim and sends an electronic remittance advice (ERA) with reason codes.

Many 44205 delays trace back to step two. If the note is unclear, the coder has to query the surgeon before charge entry, and the claim sits waiting.

Why 44205 claims get denied, and how to fix each one

Denials for 44205 tend to come from five root causes. Each has its own fix, and a review of the op note and PA status before submission prevents most of them. When the same denial keeps coming back, fix the workflow step that caused it.

Your clearinghouse’s ERA data shows the claim adjustment reason code (CARC) behind each denial. Review 44205 denials monthly. The pattern tells you whether the practice has a documentation problem or a payer-specific PA issue.

Before you submit: A five-point 44205 checklist

A clean claim goes through on first submission. For 44205, run these five checks before the claim leaves the practice:

• PA is confirmed and applies to 44205 specifically, not a different colectomy code.
• The op note names the terminal ileum resection and the ileocolostomy type.
• The approach stayed laparoscopic through the resection, with no conversion to open.
• The ICD-10 code matches your MAC’s LCD for laparoscopic colectomy.
• NCCI edits are checked for any other procedure billed on the same date.

The whole check takes a few minutes. It also lines up with the five denial reasons in the table above.

How claims management software keeps 44205 claims moving

Surgical billing teams often juggle the op note, the PA number, and a payer portal in separate places. Every handoff is another chance for a missing field or a lost remittance.

Claims management software like Pabau brings those steps into your practice management system. The CMS-1500 pre-fills from the patient record, including the CPT code on the service and the recorded diagnoses. Built-in CPT and ICD-10-CM lookup libraries help your coder confirm exact codes and titles.

Before a claim can go out, Pabau checks that required fields such as membership numbers and authorization codes are filled in.

In the US, claims route through Claim.MD, with real-time eligibility checks, claim-status tracking, and ERA retrieval. Denial reasons then land in your workflow, so staff don’t log in to each payer portal.

Send cleaner 44205 claims with less rework

Pabau pre-fills claims from the patient record and checks required fields before sending. US claims route through Claim.MD with eligibility checks and ERA retrieval.

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Conclusion

CPT code 44205 is straightforward to code when the op note does its job. A laparoscopic finish, the terminal ileum resection, and the ileocolostomy decide the code. Get those three on paper, and the choice between 44204, 44205, and 44207 settles itself.

The payoff comes after surgery. With PA confirmed and an LCD-matched diagnosis, a 44205 claim has a strong chance of paying on first submission. The trade-off is a few minutes of review before each claim, which costs far less than an appeal.

Book a demo to see how Pabau pre-fills, checks, and routes surgical claims like 44205 for your practice.

Continue your research

Coding a colectomy that leaves the terminal ileum in place? CPT code 44204 covers laparoscopic partial colectomy with a colon-to-colon anastomosis.

Is the colon joined to the rectum instead? CPT code 44207 explains coding for a laparoscopic colectomy with low pelvic anastomosis.

Chasing a denial reason code on a surgical claim? Denial codes in medical billing breaks down what each code means and how to respond.

Want to know where a claim goes after it leaves the practice? Medical claims clearinghouse guide shows how claims route from practice to payer.

Setting up billing records for complex surgery? What is a superbill walks through the fields a surgical superbill needs.

Frequently asked questions