How to Link the Bunion ICD 10 Code to CPT Surgical Procedures

During the World Bunion Day, we emphasize on proper coding of bunion surgeries. Proper Bunion ICD 10 codes and CPT links can ensure the appropriate reimbursement and help provide quality patient care in podiatry practices. Bunion surgery involves medical coding that is to be done with a lot of precision. The connection between a procedure and a diagnosis code should indicate medical necessity. 

The insurance payers will refuse to accept the claim without a proper connection. In the case of podiatry billing and orthopedic billing, the Bunion ICD 10 code is the initial one. This guide describes the way to relate that diagnosis to the appropriate CPT surgical codes. You will be taught common pairs of codes, rules of modifiers and documentation tips. To assist your practice in decreasing denials and enhancing the performance of the revenue cycle, Billing Care Solutions has prepared this guide.

Primary Bunion ICD 10 Code M20.1 Explained

The most common diagnosis for bunion surgery is M20.1. This code is acquired from hallux valgus. It is a sideways displacement of the great toe at the metatarsophalangeal joint. M20.1 Bunion ICD 10 identifies the bunion where the patient did not have a bunion that was either congenital or as a result of arthritis. 

The coders should ensure that the patient has structural deformity. Pain, swelling, and footwear problems should be noted in clinical notes. M20.1 should not be used in juvenile bunions or hallux rigidus. In the case of medical billing, this code is helpful to most bunionectomy operations. Always verify laterality. Include the sixth character 1 right foot, 2 left foot or 0 unspecified side. The incorrect laterality is one of the frequent causes of denial.

Other Common Bunion ICD 10 Diagnosis Codes

Bunions are not all M20.1. Other patients are more complicated. There are a number of related codes in the Bunion ICD 10 category. M20.5 is for other deformities of the acquired toe. This may comprise tailor bunions also referred to as bunionette. Tailor bunion is an affliction of the fifth metatarsal. The codes are M21.62 right foot and M21.63 left foot. M20.10 is used to code juvenile bunions. 

This is in the case of adolescents whose growth plates are open. The ICD 10 code of post surgical bunion recurrence is not specific. You would use M20.10 and the history code of Z98.8 instead. M19.071 or M19.072 is needed in the case of bunions with osteoarthritis. Always choose the most specific ICD 10 code for Bunion. Amorphous codes result in audit and delays in payment.

Matching Bunion ICD 10 to Hallux Valgus CPT

A distal metatarsal osteotomy with soft tissue repair is the most popular type of bunion surgery. The typical CPT code is 28296. This operation is used to correct the intermetatarsal angle and to reposition the hallux. CPT 28296 is directly equivalent to the ICD 10 code for Bunion is M20.1. The health need is evident. The patient presents with symptomatic hallux valgus which did not respond to conservative treatment. The other popular code is CPT 28292. It is a Keller surgery or resection arthroplasty. 

It is applied to old patients or patients with severe arthritis. In the case of CPT 28292, M20.1 remains the chief diagnosis. But you can add an arthritis code, in case. The linking rule is simple. The Bunion ICD 10 code should support the particular surgical method. For example a simple bunionectomy without osteotomy is CPT 28290. However, that code is hardly used nowadays. The moderate to severe bunions cost 28296 or 28292 to most payers.

Bunion ICD 10 for Recurrent Procedures CPT 28299

Bunion surgery revision is not the same. The procedure code is CPT 28299. This code deals with the correction of an unsuccessful previous bunion surgery. The initial procedure can have been an osteotomy, exostectomy or an arthroplasty. In case of recurrent bunions, the code of Bunion ICD 10 is M20.10. However, you need to include an additional code. Other specified postprocedural states- Use Z98.8. 

This should be made clear in the medical record that it is a revision. Increased work should not be done without prior permission using modifier 22. CPT 28299 must be pre-authorized by some payers. The ICD 10 code for Bunion in itself is not a reason to undergo revision surgery. In your documentation, you should have dates of the previous surgery and the cause of its failure. Usually, it is caused by the loss of fixation, insufficient fixation, or stiffness of the joints. Absent this fact, the assertion will be rejected.

Using Bunion ICD 10 With Osteotomy CPT Codes

Bunion surgeries are not necessarily the same. Other patients require a proximal osteotomy. This is coded as CPT 28297. It is a crescentic or closing wedge osteotomy of the first metatarsal base. The ICD 10 code for Bunion M20.1 is still appropriate. But you have to exhibit a misshapen face. This code is supported by an intermetatarsal angle of more than 20 degrees. CPT 28298 is another type of osteotomy. This is a two-osteotomy. It consists of both distal and proximal corrections. 

The Bunion ICD 10 code is once again M20.1. However you should add the laterality and any associated findings. e.g. M20.11 right hallux valgus with a bunion. In connecting diagnosis and procedure, employ one to one relationship. CPT has one line which is connected to one line of ICD 10 code for Bunion. In the case of three or four diagnosis codes that are not necessitated by a particular payer, do not connect them. Make the connection to the point.

Modifier Usage With Bunion ICD 10 and CPT

The procedure is clarified with the help of modifiers. When performing bunion surgery of both feet, modifier 50 is used in bilateral procedure. You will bill CPT 28296 50 once. Laterality has to be indicated in the Bunion ICD 10 code. M20.11 is right and M20.12 is left. Connect each side suitably. In case you carry out a bunion on the right foot and tailor bunion on the left foot then you can use modifier 59 to record a separate procedure service. 

The main ICD 10 code for Bunion is M20.11. M21.62 is the secondary code of the left foot. Modifier 51 should not be used to indicate several procedures unless indicated by an outdated system. Modifier 59 is more favored by most commercial payers. In the case of an assistant surgeon, append modifier 80. The Bunion ICD 10 code remains the same. But you must make sure that assistant surgery has medical merits. Simple bunions do not often require an assistant. Complex revision or osteotomies can be eligible.

Medical Necessity Documentation for Bunion ICD 10

An appropriate Bunion ICD 10 code is insufficient. To have medical necessity, you require documentation. Failure to have conservative care should be indicated in the patient record. This involves rest, ice, change of footwear, orthotics and anti inflammatory medications. The duration of conservative care should be at least three to six months. The note should specify functional limitations. They may include such things as the inability to wear closed shoes, walking difficultly or painful. 

The deformity should be confirmed by radiographs. Determine the hallux valgus and intermetatarsal angle. In the case of ICD 10 code for Bunion M20.1, the standard of a hallux valgus angle is more than 15 degrees. In severe cases the angle is more than 40 degrees. In the absence of such measurements, a payer can reduce the degree of medical necessity. Billing Care Solutions suggests a preoperative checklist. Add the ICD 10 code for Bunion, angle measurements, conservative care summary and surgery plan.

Common Denial Reasons for Bunion ICD 10 Links

Even correct codes result in denials. The most common denial is lack of medical necessity. This happens when the Bunion ICD 10 code does not correspond with the procedure. An example when using M20.1 with a simple exostectomy CPT 28190. The removal of a bone spur not a structural bunion is that code. Wrong laterality is another denial. Always verify the 6th character of the ICD 10 code for Bunion. 

In the case of the operative report right foot and claim left, the payer will deny. Bundling errors are prevalent too. Other payers combine bunion surgeries with hammertoe. Modify 59 when the hammertoe is on another digit. The other rejection is absence of modifiers. A bilateral bunion without modifier 50 will be half the amount that can be allowed. There are those payers who refuse the second procedure altogether. Regularly examine the payer policy of ICD 10 code for Bunion and CPT pairs.

Final Checklist for Bunion ICD 10 to CPT Matching

Check this last checklist before filing a claim. The first step is to verify the proper Bunion ICD 10 code. Enter M20.1 in case of acquired hallux valgus. Enter M20.10 when there is a juvenile or unknown. Indicate M21.62 tailor bunion. Second, check if the CPT code is corresponding to the surgical approach. CPT 28296 of distal osteotomy. CPT 28297 of proximal osteotomy. CPT 28298 of the double osteotomy. Keller resection CPT 28292. CPT 28299 to revise surgery. 

Third, include the appropriate laterality to the ICD 10 code for Bunion. Fourth, add modifiers when necessary to bilateral or separate processes. Fifth, make sure that the medical record includes radiographic measurements and history of conservative care. Accurate Podiatry billing requires attention to each step, sixth, verify the particular payer policy in terms of bunion surgery. Others need to be pre-authorized. There are others that have certain global periods. Seven, associate each CPT with one Bunion ICD 10 code on the claim form. Link by lines. Do not blanket linkage of all diagnosis codes to all procedure lines.

Expert Medical Billing for Podiatry and Orthopedics

Billing Care Solutions is well versed in the management of revenue cycles involving podiatry billing and orthopedic billing. The company is adept at handling complicated coding processes like bunion surgeries, bone fractures, and joint fusions. Certified coders link the correct Bunion ICD 10 and CPT codes to minimize rejections. Every billing claim is analyzed in terms of medical necessity, laterality, and proper modifier use. Prior authorizations and denial management are part of the offered services. This strategy assists in maximizing collections and minimizing paperwork. Staff members remain up-to-date on payor policies and code changes. These services suit solo practitioners and large groups.

Rejected claims will be immediately appealed along with relevant paperwork. The monthly report contains important statistics like days in A/R. Each client is assigned their own account manager. There are no long-term contracts needed to begin services. Free coding audits help uncover extra revenues. Visit Billing Care Solutions for a free audit.

Conclusion:

The assignment of the Bunion ICD 10 code to CPT surgical procedures is a complex one. It needs an understanding of podiatric anatomy, coding rules and payer policies. One misstep results in rejection, re-write and non-payment. 

Billing Care Solutions focuses on podiatry and orthopedic medical coding and billing. We assist your practice in selecting the appropriate Bunion ICD 10 code, using the appropriate CPT, and record medical necessity. We scrutinize all the claims prior to submission. We follow-up on refuses and rectify the source. To get more information about our services, go to Billing Care Solutions. Allow us to do your bunion surgery billing and you concentrate on patient care. Get a free coding audit today.

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