Chiropractic CPT Code Framework
Chiropractic billing depends on a compact CPT code set, but the payer rules attached to those codes are more restrictive than most outpatient specialties. Chiropractic manipulative treatment uses CPT code 98940 for one to two spinal regions, 98941 for three to four spinal regions, and 98942 for all five spinal regions. Medicare Part B covers these spinal manipulation codes when documentation supports active treatment of a diagnosed subluxation. Most commercial payers follow the same structure, but each payer applies its own visit limits, prior authorization thresholds, and bundling edits.
Revenue in chiropractic practices comes from a mix of spinal manipulation, adjunctive therapies, examinations, and workers compensation or personal injury claims. That means code selection has to match not only the service performed, but also the rules of the specific payer. A claim can be technically correct in CPT terms and still deny if the payer does not cover that therapy for chiropractors, if the AT modifier is missing, or if the visit count has been exhausted. Accurate CPT use protects both reimbursement and compliance.
Chiropractic Manipulative Treatment Codes 98940 Through 98942
CPT code 98940 reimburses about $28 to $38 for one to two spinal regions. CPT code 98941 reimburses about $32 to $45 for three to four spinal regions. CPT code 98942 reimburses about $38 to $52 for all five spinal regions. The region count must come directly from the treatment note. Cervical, thoracic, lumbar, sacral, and pelvic are the recognized spinal regions. If the chiropractor documents only three regions treated, billing 98942 overstates the work and creates audit risk. If five regions were treated and only 98940 is billed, the practice loses revenue on every visit.
Medicare covers only manual manipulation of the spine to correct subluxation, so 98940 through 98942 are the core chiropractic codes for Medicare beneficiaries. Use diagnosis coding and treatment documentation that show why active treatment is medically necessary. Payers reviewing these claims look for region-specific findings, functional limitations, and progress toward measurable goals.
Extraspinal Manipulation and Therapy Codes
CPT code 98943 covers extraspinal chiropractic manipulative treatment for regions such as the shoulder, elbow, wrist, hip, knee, ankle, head, or temporomandibular joint. Commercial payers sometimes reimburse 98943 at roughly $18 to $32, but Medicare does not cover it for chiropractors. Therapeutic exercise 97110 typically reimburses about $28 to $40 per timed unit, and manual therapy 97140 often falls in the $26 to $38 range per unit. Mechanical traction 97012 and electrical stimulation codes vary widely by payer, and many plans bundle or exclude them when billed by chiropractors.
These codes create revenue only when documentation supports a distinct, separately billable service. If the practice bills 97140 on the same body region and in the same time span as a spinal manipulation code, some payers will bundle the line or deny it as inclusive. To preserve payment, the note should identify the body region, the hands-on technique, the time spent, and the therapeutic purpose of the service.
Initial Evaluation and Re-Evaluation Codes
Chiropractors may use office E/M codes such as 99202 through 99204 for initial evaluations and 99212 through 99214 for medically necessary follow-up visits when the payer allows them. Medicare generally does not pay chiropractors for office E/M services unless the chiropractor has a separate provider type or the payer contract specifically permits it. Commercial plans are more variable. Some plans reimburse the initial examination but not routine re-evaluations. Others require the evaluation to be billed only on the first visit or at a documented change in condition.
The evaluation note should include history, examination findings, assessment, treatment plan, and measurable objectives. When E/M is billed with chiropractic manipulation, the payer must see that the evaluation work goes beyond the pre-adjustment assessment already built into the treatment visit.
Modifier and Unit Rules That Affect Reimbursement
The AT modifier is the most important chiropractic modifier because Medicare uses it to distinguish active treatment from maintenance care. If the chiropractor is correcting a subluxation and the patient is still improving functionally, append AT to 98940, 98941, or 98942. If the patient is in maintenance care, Medicare denies the claim. Modifier 25 may apply when a significant and separately identifiable E/M service is performed on the same day as manipulation. Modifier 59 or XS may be needed for therapy codes when payer edits would otherwise bundle them, but only when documentation supports a distinct service.
Timed therapy codes such as 97110 and 97140 follow the eight-minute rule. One unit generally requires at least eight minutes of documented service. Two units usually require at least twenty-three minutes. Missing time documentation is one of the fastest ways to lose otherwise valid charges.
How MMBS Uses Chiropractic Code Strategy
MMBS maintains a 98.2% clean claim rate across all specialties by matching CPT selection to payer rules, modifier rules, and visit-limit logic before claim submission. For chiropractic practices, that means tracking the spinal regions documented on each visit, validating AT modifier use under Medicare Part B, and identifying when adjunctive therapies are likely to deny so the practice can collect appropriately or adjust the treatment workflow. Accurate coding is not just a reimbursement issue. It is the foundation of a cleaner denial rate, faster remittance posting through ERA files, and fewer surprises when EOBs arrive.