Coding

Modifier 22 — Is It Worth the Effort?

R. Dale Blasier, MD, FRCSC, MBA

Arkansas Children's Hospital

Little Rock, AR

Modifier 22, while seeming attractive, is one of the most scrutinized—and often denied—modifiers in medical billing. It exists to enable physicians to be paid a premium rather than the standard rate when an operation or procedure turns complex However, it takes some effort to make the code work properly to increase reimbursement. Modifier 22 is appended to a procedure code to indicate the service performed was substantially greater than typically required for that procedure.

There are several reasons why the use of the 22 modifier is helpful. Modifier 22:

Increases reimbursement for services that require additional effort or complexity.
Helps to accurately reflect the level of care provided to patients.
Can improve provider satisfaction by compensating for extra work.
Enhances the clarity of billing records by indicating special circumstances.
Supports the justification of higher fees in audits and reviews.

There are also several reasons why use of the modifier may not work as planned. Modifier 22:

Often leads to claim denials or audits by payers.
Requires manual review which slows the reimbursement process.
Requires thorough documentation to support the modifier's use.
May create confusion among billing staff if not properly understood.
Can lead to increased scrutiny from insurance companies.
Overuse may diminish its effectiveness and lead to payer pushback.

The AMA defines Modifier 22 in CPT

The AMA defines modifier 22—officially titled "Increased Procedural Services"—in Appendix A of the CPT codebook. The operative language is that the work required to provide the service was "substantially greater than typically required."

The AMA's guidance in CPT Assistant further clarifies that this modifier identifies an increment of work that is unusual within a particular procedure and is not described by any other, separately billable code. The key phrase is "substantially greater." The CPT codebook does not provide a numeric threshold—it does not specify "30% more work" or "20 extra minutes."1

This ambiguity is intentional: it allows the modifier to apply to a wide range of specialties and circumstances. However, it also means that every payer has discretion to define what is "substantial" during adjudication. This is why documentation becomes the most important factor in whether a modifier 22 claim is paid or denied.

Medicare and Modifier 22

For Medicare and Medicare Advantage, the governing reference is the CMS Internet-Only Manual (IOM), Publication 100-04, Medicare Claims Processing Manual, Chapter 12, Section 40.2.2 That section addresses billing requirements for global surgeries under unusual circumstances, specifying that when the service performed is significantly greater than usually required, the procedure may be billed with modifier 22 appended, but only after manual medical record review. CMS does not guarantee additional payment—it simply allows the claim to be considered for it.3

When Should Modifier 22 Be Used?

Modifier 22 is appropriate only when genuinely rare intraoperative or procedural factors increase the physician's work well beyond that anticipated for a standard performance of that CPT code. The following circumstances are generally recognized by CMS, AMA, and major payer policies as valid indications:

Prolonged Procedure Time: The procedure took considerably longer than the typical time range for that code, due to clinical—not administrative or logistical—reasons (eg, unusual anatomy, unexpected findings). "Longer than usual" alone is not sufficient; you must document the clinical reason and provide a time comparison.
Excessive Procedural Blood Loss: Blood loss significantly exceeds the expected range for the procedure, requiring additional interventions (transfusion, packing, vascular control) beyond what is included in the base CPT code.
Extensive Trauma Affecting the Surgical Field: Traumatic injury to the operative site that is extensive enough to materially complicate the procedure and cannot be billed as a separate CPT code. If local repair of trauma can be separately coded, modifier 22 does not apply.
Unusual Pathology Directly Which Affects the Procedure: It is possible to encounter large tumors, cysts, adhesions, or anatomical malformations (congenital, traumatic, or surgical) that significantly complicate the procedure and cannot be separately billed.
Morbid Obesity (BMI >= 40) with Documented Surgical Impact: A BMI of 40 or above may contribute to unusual complexity, but obesity alone is not a sufficient basis for modifier 22. The operative report must clearly connect the patient's obesity to specific, documented surgical challenges encountered during the procedure. ICD-10-CM codes for the BMI range (Z68.41-Z68.45) should be included.
Significantly More Complex Service than the CPT Descriptor: The procedure performed was far more complex than the standard description for the code submitted, and no other, more specific CPT code exists to describe the additional work.

Which Codes Can Be Appended with Modifier 22

Modifier 22 can only be appended to procedure codes that carry a Medicare global period indicator of 000, 010, or 090 on the CMS Physician Fee Schedule (MPFS). This limits it to surgical and procedural codes—specifically those that have a defined global surgical package. Modifier 22 cannot be used with E/M codes, anesthesia codes, unlisted procedure codes, and HCPCS codes for DME and supplies.

Documentation is the Key

Documentation is very important for modifier 22 to work properly. Payers require a manual case review before granting additional reimbursement, and the operative report is the primary evidence they consider. Vague, generic language will result in denial. Specific, comparative, quantified language will increase the likelihood of additional payment.

For CMS and most commercial payer policies, the documentation must include two specific elements:

The Additional Work Required: Why was this procedure more difficult, more complex, or more time-consuming than the standard performance of the same CPT code?
The Medical Necessity for the Additional Work: What clinical circumstances (patient anatomy, unexpected findings, or patient comorbidities) required this increased effort?

What the Operative Report Must Contain

Comparison to Typical Case:  This is the most important item of documentation. It is crucial to contrast what was actually performed with what would be typical. For example: "This bunionectomy required 120 minutes of operative time compared to the typical 60 minutes for this procedure, due to the soft tissue scarring and bony deformity from prior crush injury of the foot that required meticulous dissection and intraoperative imaging before the first metatarsal could be safely visualized."
Specificity on Blood Loss: If excessive blood loss is the basis, it is important to describe the estimated blood loss (EBL) in milliliters, compare it to the typical EBL for the procedure, and describe the interventions required (packing, electrocautery, transfusion, etc.).
Documentation of Actual Time: If prolonged duration is a factor, document start and end times (which should appear in the anesthesia record and operating room log), and note the usual time range for the procedure.
Pathological/Anatomical Findings: Describe in detail, eg, "Extensive scarring and contracture of the skin and soft tissues overlying the operative site requiring sharp dissection) were encountered, requiring 25 additional minutes of dissection time before the operative field could be adequately exposed"
The Impact of Morbid Obesity: It is not sufficient to simply note the patient's BMI. It is important to describe how the obesity specifically affected the procedure: visualization difficulties, equipment limitations, anatomical distortion, need for additional retractors or longer instruments, etc.

The Cover Letter/Concise Statement

In addition to the operative report, most payers and all Medicare MACs require a concise written statement submitted with the claim.3 This is separate from the operative note. It should:

Summarize in a few sentences why modifier 22 applies to this specific claim.
Identify the specific clinical circumstance that created additional work.
State the additional reimbursement you are requesting (eg, 125% of the standard fee schedule rate) and briefly justify that figure.
Reference the portions of the operative report that document the unusual circumstances.

For electronic claim submission, this concise statement may need to be entered in the narrative field or submitted via the PWK (Paper Work) attachment process, depending on the MAC's requirements.

The Decision to Use or Ignore Modifier 22

Modifier 22 is attractive in that it offers the possibility of increased reimbursement for difficult procedures. Yet the use of the modifier requires extra effort to substantiate the claim and it is not unusual for payers to delay or deny the claim. Success in increasing payment is variable among practices. At one large east coast orthopedic group, there is success in increasing reimbursement approximately 75% of the time. The primary code with the 22 modifier is initially paid at the 100% percent allowable. Processing of the claim is delayed pending review of the 22 modifier. Additional reimbursement is subsequently paid upon review of the documentation, and insurance determines that the use of the 22 modifier is supported. Per the contract validation department this could take up to 2 months and additional payment ranges from 10%-20% of the primary allowed amount.

In a landmark study specific to orthopaedics, the authors tracked 150 spine and total joint cases over an eight-year period which were billed with the 22 modifier.4 The study analyzed how commercial and public payers handle claims submitted with modifier 22. Only 42% of the claims resulted in any additional reimbursement over the standard fee schedule. Across all cases where the modifier was applied, the net increase in reimbursement amounted to an average of only 5.5%. While unmodified claims were typically paid in 15 to 30 days, claims appended with modifier 22 had payment delays on average of 118 days for Medicare and 138 days for private payers. The authors concluded that when accounting for inflation and the sheer cost of staff hours spent fighting the delays, modifier 22 is not worth the administrative effort for standard spine practices.

The decision to use or not use the modifier should be based upon local payer factors and the expertise of the claim submitters. If the modifier is used, care should be taken to follow up on reimbursement to see if the goals of payment are achieved.

References

Author Disclosure

RD Blasier: Other: AAOS (Travel Expense Reimbursement, Member of Committee on Coding, Coverage and Reimbursement); Other Office: AAOS (Travel Expense Reimbursement).