Chiropractic Billing and Coding: CPT Codes and Claims

Chiropractic billing and coding translates clinical services into standardized alphanumeric identifiers that determine payment from Medicare, Medicaid, and private insurers. Accurate code selection governs claim approval, audit exposure, and reimbursement rates across every practice setting. This page covers the principal CPT codes used in chiropractic practice, the mechanics of claim submission, the regulatory frameworks enforced by the Centers for Medicare & Medicaid Services (CMS), and the classification boundaries that separate covered from non-covered services.

• Definition and Scope
• Core Mechanics or Structure
• Causal Relationships or Drivers
• Classification Boundaries
• Tradeoffs and Tensions
• Common Misconceptions
• Checklist or Steps
• Reference Table or Matrix

Definition and Scope

Chiropractic billing encompasses the process of documenting clinical encounters, assigning procedural and diagnostic codes, and submitting claims to payers for reimbursement. The foundational code set is the Current Procedural Terminology (CPT), maintained and published annually by the American Medical Association (AMA). Diagnostic codes are drawn from the International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM), updated each fiscal year by CMS and the National Center for Health Statistics (NCHS).

The scope of chiropractic billing extends beyond manipulation codes. It includes evaluation and management (E/M) services, physical medicine modalities, radiographic services, and — in some jurisdictions — nutritional and wellness counseling. For an overview of how these services fit within licensed chiropractic practice, see chiropractic scope of practice.

Under Medicare Part B, coverage is restricted to manual manipulation of the spine to correct a subluxation demonstrated by x-ray or physical examination (CMS Medicare Benefit Policy Manual, Chapter 15, §30). This narrow statutory definition contrasts sharply with broader private-payer contracts, creating a split regulatory environment that practitioners must navigate claim by claim.

Core Mechanics or Structure

CPT Code Structure for Chiropractic

The primary manipulation codes occupy the range 98940–98943, established within the CPT codebook under the Physical Medicine and Rehabilitation section:

• 98940 — Spinal manipulation, 1–2 regions
• 98941 — Spinal manipulation, 3–4 regions
• 98942 — Spinal manipulation, 5 regions
• 98943 — Extraspinal manipulation (extremity or other)

The spine is divided into 5 regions for coding purposes: cervical, thoracic, lumbar, sacral, and pelvic. Region count drives code selection; billing a higher-region code without supporting documentation is a well-recognized audit target.

Evaluation and Management Codes

New patient E/M visits are coded under 99202–99205; established patient visits use 99211–99215. Since the AMA's 2021 E/M guideline revisions, code level is determined by either medical decision-making (MDM) complexity or total time spent, eliminating the prior history/examination component requirement. This structural change affects how chiropractic initial examinations are documented and billed.

Modality and Physical Medicine Codes

Adjunctive services billed alongside manipulation include:

• 97010 — Hot/cold pack application (supervised, not time-based)
• 97012 — Mechanical traction (supervised)
• 97014 — Electrical stimulation (supervised)
• 97110 — Therapeutic exercises (timed, 15-minute units)
• 97530 — Therapeutic activities (timed)

Timed codes require documentation of direct one-on-one contact time in 15-minute increments, following the "8-minute rule" as described in CMS guidelines for outpatient therapy services (CMS Pub. 100-02, Chapter 15).

Understanding how these codes interact with the broader chiropractic insurance coverage guide is essential for claims accuracy.

Causal Relationships or Drivers

Documentation as the Root Variable

Code assignment is downstream of clinical documentation. If the treatment note does not specify regions manipulated, list the subluxation level, or describe the nature of the complaint, the code cannot be substantiated on audit. The Office of Inspector General (OIG) of the U.S. Department of Health and Human Services has identified chiropractic services as a recurring target in its Work Plan, citing upcoding of manipulation regions and billing for non-covered maintenance care as the two dominant risk categories (OIG Work Plan, HHS.gov).

Payer Policy Variation

Private insurers publish individual coverage policies (Local Coverage Determinations for Medicare Advantage; benefit summaries for commercial plans) that define covered diagnoses, visit limits, and prior authorization requirements independently of CMS rules. A claim denied under one policy may be paid under another for an identical service. The medicare coverage for chiropractic services page details the specific CMS coverage criteria in depth.

ICD-10-CM Diagnosis Specificity

A manipulation claim without a covered ICD-10-CM diagnosis code will be denied regardless of CPT accuracy. Common covered spinal diagnoses include M54.5 (low back pain), M54.2 (cervicalgia), and M47-series spondylosis codes. Maintenance care — services provided to sustain, rather than improve, a patient's condition — does not meet Medicare's "active/corrective treatment" threshold and requires an Advance Beneficiary Notice of Noncoverage (ABN) under 42 CFR §411.404.

Classification Boundaries

Covered vs. Non-Covered Services Under Medicare

Medicare's coverage of chiropractic is among the most restricted of any specialty. Only spinal manipulation (98940–98942) is covered. The following are explicitly excluded from Medicare chiropractic coverage:

• 98943 (extraspinal manipulation)
• All E/M services billed by a chiropractor (DC) when the purpose is solely to manage a Medicare-covered manipulation visit
• Diagnostic imaging ordered by a DC (except under specific Medicare Advantage plan terms)
• Physical therapy modalities (97010, 97014, etc.) when provided incident-to a DC's manipulation visit

These boundaries are defined in the CMS Medicare Benefit Policy Manual, Chapter 15.

Maintenance Care Classification

The distinction between "active/corrective" and "maintenance" care governs Medicare payment eligibility. Active care requires documented expectation of functional improvement within a reasonable timeframe. Once a patient has reached maximum therapeutic benefit, continued manipulation is classified as maintenance and becomes non-covered. This determination is clinical and must be reflected explicitly in treatment notes. See chiropractic treatment plan structure for documentation framework details.

Tradeoffs and Tensions

Specificity vs. Efficiency in Documentation

Granular documentation sufficient to justify a 98942 (5-region) code requires detailed notation of each spinal region treated, the subluxation finding in each region, and the intervention applied. High-volume practices face a structural tension between throughput and documentation depth. Electronic health record (EHR) templates that auto-populate region fields without clinician input are a documented source of audit vulnerability.

Bundling vs. Unbundling

CMS and commercial payers apply National Correct Coding Initiative (NCCI) edits, maintained by CMS, to prevent unbundling — billing separately for services that are components of a single procedure. For example, billing 97012 (mechanical traction) in addition to 98941 on the same date may be subject to an NCCI edit depending on the payer. Conversely, under-bundling by omitting legitimate adjunctive services reduces appropriate reimbursement. The NCCI edit tables are publicly available at CMS NCCI.

Medicare vs. Private Insurance Alignment

Practices serving mixed payer populations must maintain parallel billing logic — applying CMS restrictions for Medicare patients while following plan-specific rules for commercial patients. A billing workflow optimized for Medicare will systematically undercode for commercial payers with broader coverage, and vice versa.

Common Misconceptions

Misconception: CPT 98943 is covered by Medicare for chiropractic.
Correction: CMS explicitly excludes extraspinal manipulation from Medicare chiropractic coverage. Only spinal manipulation codes 98940–98942 appear in the covered service definition under Chapter 15 of the Medicare Benefit Policy Manual.

Misconception: A signed ABN transfers all financial liability to the patient.
Correction: An ABN is only valid when the specific service and the specific reason for potential non-coverage are identified in advance. Blanket or retroactive ABNs do not meet the CMS requirements at 42 CFR §411.404 and are not enforceable.

Misconception: Documentation of a diagnosis code is sufficient to establish medical necessity.
Correction: A covered ICD-10-CM code is necessary but not sufficient. Clinical notes must also establish the nature of the subluxation, the treatment applied, and the expected functional improvement. The diagnosis code alone cannot carry a claim through a post-payment audit.

Misconception: Chiropractic and physical therapy modality codes are freely combinable.
Correction: NCCI edits restrict certain code pairings. Additionally, for Medicare, services provided by a DC that are in the category of physical therapy require separate qualification or physician supervision criteria that DCs do not meet as non-physician practitioners under 42 USC §1395x.

Checklist or Steps

The following sequence describes the structural components of a chiropractic billing cycle as a reference framework, not as practice advice:

1. Patient intake and insurance verification — Confirm active coverage, payer-specific covered codes, visit limits, and prior authorization requirements before the first encounter. Reference chiropractic patient intake and examination for intake documentation structure.
2. Clinical documentation of the encounter — Record chief complaint, subluxation findings by spinal region, examination findings, treatment rendered (regions manipulated, modalities applied), and time for timed services.
3. CPT code selection — Match the documented number of spinal regions to 98940, 98941, or 98942; add 98943 only when extraspinal manipulation is documented and payer covers it; add modality codes per documented services.
4. ICD-10-CM code assignment — Assign the most specific supported diagnosis code(s); confirm the primary diagnosis meets payer medical necessity criteria.
5. Active vs. maintenance determination — Assess and document whether the patient continues to show functional progress, or whether care has transitioned to maintenance (triggering ABN requirements under Medicare).
6. Claim construction — Complete the CMS-1500 form (or electronic 837P transaction) with place of service code, rendering provider NPI, referring provider if applicable, and correct modifier usage (e.g., Modifier -AT for active/corrective Medicare chiropractic claims).
7. Modifier -AT compliance check — For every Medicare chiropractic claim, Modifier -AT must be appended to 98940–98942 to certify that services are active/corrective. Omission results in automatic claim denial per CMS policy.
8. Submission and tracking — Submit electronically through a clearinghouse; track claim status; respond to requests for additional documentation (RAD) within payer deadlines.
9. Remittance review and denial management — Review Explanation of Benefits (EOB) or Electronic Remittance Advice (ERA) for adjustment codes; initiate appeals within timely filing windows.
10. Audit readiness — Retain documentation for a minimum of 7 years in accordance with general federal healthcare record retention guidance; ensure records support the billed codes on their face.

Reference Table or Matrix

CPT Codes Commonly Used in Chiropractic Practice

Modifier Reference for Chiropractic Claims

References

• American Medical Association — Current Procedural Terminology (CPT)
• CMS Medicare Benefit Policy Manual, Chapter 15 — Covered Medical and Other Health Services
• CMS National Correct Coding Initiative (NCCI) Edits
• HHS Office of Inspector General — Work Plan
• CDC / NCHS — ICD-10-CM Official Guidelines for Coding and Reporting
• CMS — 42 CFR Part 411, Exclusions from Medicare and Limitations on Medicare Payment
• CMS — Advance Beneficiary Notice of Noncoverage (ABN)