CPT code 27177: Slipped epiphysis, acute, open treatment2026 Medicare rate & RVUs in Missouri
Report this code for open operative treatment of an acute slipped femoral epiphysis, with or without internal fixation.
CMS doesn’t publish an office rate for 27177 in Missouri.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
Your location
On this page 9 sections
What 27177 covers
An orthopedic surgeon reports this service for open treatment of an acute slipped capital femoral epiphysis (SCFE), a displacement at the growing end of the femur near the hip. The operation addresses the acute slip through an open approach; internal fixation may be used. This is distinct from closed treatment and from open treatment of a chronic slip.
Select the code based on the documented acute condition and open operative approach, not simply the presence of a hip pin or the diagnosis of SCFE. The operative report should establish the acute slip and describe the open treatment and any fixation. Medicare assigns a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures are performed in one session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% multiple-procedure reduction. Modifier 50 identifies bilateral treatment and is paid at 150%. Assistant-at-surgery payment may be available; co-surgeons are paid only with supporting documentation. Team surgery is not permitted.
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 27177 pays more and less in Missouri
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Kansas City, MO | Unavailable | $1,000.01 |
| Metropolitan St. Louis, MO | Unavailable | $1,007.87 |
| Rest of Missouri | Unavailable | $969.58 |
How the 27177 rate is calculated
Each of 27177’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.
How the rate is built · 27177
RVUs × geographic indexes × conversion factor
Work15.69
15.69 RVUs× 1.000 GPCI
Practice expense11.70
11.70 RVUs× 1.000 GPCI
Malpractice3.34
3.34 RVUs× 1.000 GPCI
Adjusted RVUs
30.7300
Conversion factor
$33.4009
Medicare rate
$1,026.41
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 27177
27177 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 27177
Slipped epiphysis, acute, open treatment
| Rule | CMS value | What it means |
|---|---|---|
| Global period | 090 | Major surgery: the day before, the day of, and 90 days after are included. |
| Multiple procedures | 2 | Standard reduction: highest-valued procedure at 100%, others at 50%. |
| Bilateral (modifier 50) | 1 | Bilateral with modifier 50 pays 150% of the fee schedule amount. |
| Assistant at surgery (80/81/82/AS) | 2 | Paid. |
| Co-surgeons (62) | 1 | Permitted with supporting documentation. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
| Split (54/55/56) | 0.10/0.69/0.21 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 27177
Slipped epiphysis, acute, open treatment
90-day global period ends
Dec 30, 2026
Covers Sep 30, 2026 through Dec 30, 2026 (92 days, including the day before surgery).
Visit on Oct 31, 2026
Day 30 of the 90-day post-op period: related follow-up care is included in the surgical payment.
Pre-op dayGlobal period
What modifiers do to the payment
Modifier 50 · payment effect
With and without the modifier
27177 without 50 · national facility
$1,026.41
Slipped epiphysis, acute, open treatment
27177-50 · Bilateral: 150%
$1,539.62
Both sides on one line with modifier 50 are paid at 150% of the fee schedule amount (subject to multiple-procedure rules with other procedures).
27177 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 27175Slipped epiphysis treatmentWithout manipulation
- Use 27175 for closed treatment without manipulation; 27177 is open treatment of an acute slip.
- 27176Slipped epiphysis treatmentClosed, with manipulation
- Use 27176 for closed treatment with manipulation. An open operative approach for an acute slip is reported with 27177.
- 27178SCFE surgeryOsteotomy with fixation
- The key distinction is acuity: 27178 is for open treatment of a chronic slipped femoral epiphysis, while 27177 is for an acute slip.
27177 billing questions
How does 27177 differ from closed treatment codes 27175 and 27176?
27177 is for open treatment of an acute slipped femoral epiphysis. Codes 27175 and 27176 describe closed treatment, distinguished by whether manipulation is performed.
When should 27177 be distinguished from 27178?
Use 27177 for an acute slip treated through an open approach. Code 27178 is the related open-treatment code for a chronic slipped femoral epiphysis.
Does internal fixation change the code selection?
No. The code includes open treatment with or without internal fixation; document the operative approach and treatment of the acute slip.
What postoperative care is included?
The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
How is bilateral treatment reported?
Report modifier 50 for bilateral treatment. CMS pays the bilateral procedure at 150%.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery payment may be available. Co-surgeon payment requires supporting documentation, and team surgery is not permitted.
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
Show the CMS file lines behind this rate
Fee sheets · Coming soon
Put 27177 and the rest of your codes on one sheet
Your codes at your locality, with payer contracts beside Medicare.
Join the waitlist