CPT Code 95913: Nerve conduction studies, 13 or more

Key Takeaways

CPT Code 95913 covers nerve conduction studies involving 13 or more distinct studies performed during a single encounter

Each named nerve counts once regardless of recording sites; motor and sensory testing of the same nerve count as two separate studies

When NCS and EMG are performed the same day, use add-on codes 95885, 95886, or 95887 for EMG instead of standalone EMG codes 95860-95870

CPT codes 95907-95913 cannot be used to bill automated nerve conduction testing devices under CMS and major payer policies

Pabau’s claims management software helps electrodiagnostic practices document study counts and submit clean claims for the 95907-95913 code family

CPT Code 95913: Definition and clinical description

CPT Code 95913 is the highest-tier code in the nerve conduction study (NCS) series, covering encounters where 13 or more distinct studies are performed. Getting the study count right before submission is the difference between clean reimbursement and an audit flag.

The American Medical Association (AMA) maintains 95913 within the Neurology and Neuromuscular Procedures section. It is used to assess peripheral nerve function in patients presenting with neuropathy, radiculopathy, carpal tunnel syndrome, and related conditions.

Practices billing this code include neurology, physiatry, and physical medicine groups. Accurate use depends on understanding how studies are counted, how same-day EMG rules apply, and what documentation is required to support medical necessity. This guide covers each of those areas, along with the 95907-95913 range and Medicare reimbursement context. Electrodiagnostic practices using claims management software can reduce these errors before claims leave the practice.

CPT code range 95907-95913: How the series is structured

CPT Code 95913 sits at the top of a seven-code series structured entirely by study count. Selecting the wrong code in this range is one of the most common audit triggers in electrodiagnostic billing. The full range is as follows:

Only one code from this series is billable per encounter. The total study count across the entire visit determines which code applies. Reporting 95912 and 95913 together for the same encounter is incorrect, and NCCI edits will likely deny one of them. Physical therapy and physiatry practices can reference additional context on electrodiagnostic billing through physical therapy EMR workflows.

How to count nerve conduction studies for CPT Code 95913

Counting errors are the primary reason electrodiagnostic claims are downcoded or denied. The rules below are drawn from CMS guidance and AANEM recommended policy.

The per-nerve counting rule

Each named nerve, or named branch of a nerve, counts as one study regardless of how many recording sites are tested. Testing the ulnar nerve at the wrist, forearm, below the elbow, above the elbow, axilla, and supraclavicular region still equals one study. Multiple recording sites on the same nerve do not increase the count.

Motor vs. sensory: two separate studies

Motor and sensory testing of the same nerve count as two distinct studies. If the median nerve is tested for both motor conduction (measuring latency, amplitude, and conduction velocity) and sensory conduction, that equals two studies, not one. F-wave testing of a motor nerve counts as part of that motor study, not as a separate study. H-reflex testing, by contrast, counts as a separate study per the AMA CPT guidelines.

Reaching the 13-study threshold

A comprehensive bilateral upper and lower extremity evaluation will typically generate 13 or more studies. For example: bilateral median motor + sensory (4 studies), bilateral ulnar motor + sensory (4 studies), bilateral peroneal motor (2 studies), bilateral sural sensory (2 studies), and bilateral tibial motor (2 studies) equals 14 studies, placing the encounter squarely within 95913 territory. Each combination must be documented individually in the operative or procedure report.

Practices that bill other specialty-specific codes frequently face parallel counting questions. The same principle of per-named-procedure counting applies across CPT families, including IVF CPT codes. A structured nerve examination checklist helps document each study consistently so the count stays auditable.

CPT Code 95913: Medicare coverage and reimbursement rates

Medicare reimburses CPT Code 95913 under the Medicare Physician Fee Schedule (MPFS). Rates vary by geographic locality and whether the professional component only (modifier -26), technical component only (modifier -TC), or global service (no modifier) is billed. The rates below reflect 2025 national non-facility amounts; use the CMS Physician Fee Schedule lookup tool to verify your locality-adjusted rate before billing.

Rates are subject to annual MPFS updates. The figures above are approximate national reference points; actual reimbursement depends on geographic practice cost index adjustments. The professional component carries the larger share of the global payment, since interpretation drives the work RVUs for this code.

Commercial payer rates vary substantially from Medicare rates, and some payers impose frequency limitations or require prior authorization for encounters reaching the 13-study threshold. Always confirm coverage with the specific payer before scheduling a comprehensive electrodiagnostic evaluation.

Same-day EMG and NCS billing: add-on codes 95885, 95886, and 95887

When needle electromyography (EMG) and nerve conduction studies are performed on the same day, the billing rules change. Per CMS Medicare Coverage Database Article A54992, standalone EMG codes 95860-95870 cannot be used when NCS codes 95907-95913 are also billed for the same encounter. Instead, use the following add-on codes:

• 95885: Needle EMG, each extremity, with corresponding nerve conduction studies, limited (fewer than 5 muscles tested per extremity)
• 95886: Needle EMG, each extremity, with corresponding nerve conduction studies, complete (5 or more muscles tested per extremity)
• 95887: Needle EMG, non-extremity (paraspinals, cranial nerve innervated muscles, or other non-limb sites)

These add-on codes are reported in addition to the primary NCS code (95913 in a comprehensive encounter). They cannot be billed without a primary NCS code from the 95907-95913 series. Each extremity evaluated with needle EMG is reported separately, so a bilateral upper extremity evaluation where both arms receive needle EMG testing would generate two units of 95886 (or 95885, depending on muscle count).

Incorrect use of the standalone EMG codes on the same day as NCS codes is a payer-specific denial trigger and a common NCCI edit. Practices new to this pairing can review how the two services fit together under the EMG and nerve conduction studies code before submitting.

Automated nerve conduction testing and CPT 95913 exclusions

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Automated nerve conduction testing devices measure nerve function using pre-programmed stimulation protocols rather than physician-directed manual testing. These devices are explicitly excluded from CPT codes 95907-95913, including 95913, under CMS policy and major commercial payer medical policies.

The distinction matters because automated devices are sometimes used in primary care or urgent care settings as screening tools. Billing 95913 for an automated device study when manual NCS was not performed constitutes upcoding and is subject to recoupment and audit. When an automated device is used, practices should code the encounter using the appropriate evaluation and management (E/M) code for the clinical visit rather than attempting to bill the NCS series.

Maintaining complete documentation of the method used (manual vs. automated) is essential. Digital intake and procedure documentation tools, such as digital documentation forms, help practices capture this distinction at the point of care before claims are generated.

Documentation requirements for CPT Code 95913

Medical necessity documentation for CPT Code 95913 must support both the clinical indication and the study count. Payers routinely audit high-volume NCS encounters because 13-or-more-study evaluations represent the maximum reimbursement tier. Weak documentation is the most common reason for post-payment recoupment in this code family.

What the procedure report must include

• A list of each nerve studied, the type of study (motor or sensory), and the recorded measurements (latency, amplitude, conduction velocity)
• F-wave and H-reflex results where performed, labeled by nerve
• The clinical indication tied to a supporting ICD-10 diagnosis code (see crosswalk section below)
• The physician’s interpretation and conclusion, separate from the raw data table
• A statement confirming that testing was performed manually (not by an automated device)

Payer-specific documentation triggers

Medicare’s local coverage determinations (LCDs) vary by MAC (Medicare Administrative Contractor) jurisdiction. Some MACs require a signed physician order before the NCS study is performed; others require a referring diagnosis on the order. Commercial payers such as Anthem use their own medical policies (for example, CG-MED-24) with specific coverage criteria for outpatient electrodiagnostic evaluations.

Reviewing the applicable LCD or medical policy before the encounter prevents denial on procedural grounds. Practices managing HIPAA compliance for medical offices should also ensure that electrodiagnostic reports shared with referring physicians meet the minimum necessary standard. Documentation practices that support coding also support automated billing workflows that catch missing fields before claim submission.

ICD-10 diagnosis codes that support CPT Code 95913 medical necessity

Every NCS claim requires at least one supporting ICD-10 diagnosis code that establishes medical necessity. The following codes are among those most commonly linked to electrodiagnostic evaluations that reach the 13-study threshold.

Practices billing 95913 for diabetic neuropathy evaluations should use the most specific E11 code available, such as the E11.40 diabetic neuropathy code, rather than a generic entry. Generic codes like G62.9 are adequate when a more specific etiology has not been established, but payers may request additional clinical justification.

Radiculopathy indications are common drivers of comprehensive four-limb studies. For the lumbar presentations behind G54.4, see the lumbar radiculopathy ICD-10 codes; for cervical presentations behind G54.2, the cervical radiculopathy code M50.13 is the more specific alternative when disc disease is documented.

Common billing errors and how to avoid them for CPT Code 95913

The AANEM’s recommended policy for electrodiagnostic medicine identifies several recurring billing problems in the 95907-95913 series. The five errors below account for the majority of denials and audits.

• Miscounting studies: Counting recording sites instead of named nerves, or failing to count motor and sensory testing of the same nerve as two separate studies
• Wrong same-day EMG code: Billing 95860-95870 alongside 95913 instead of the required add-on codes 95885/95886/95887
• Billing automated NCS as manual: Using 95913 for automated device testing rather than manual physician-directed studies
• Unsupported medical necessity: Submitting a 13-study encounter without a diagnosis code that clinically justifies comprehensive bilateral evaluation
• Missing physician interpretation: Submitting raw data tables without a signed physician conclusion; payers require an interpretation to support the professional component

Practices using coaching CPT codes or other specialty billing frameworks often apply similar pre-submission audit checklists. If you are still mapping out your revenue cycle, this primer on what medical billing involves covers the same pre-claim review discipline that reduces avoidable denials across all CPT families.

Conclusion

Electrodiagnostic billing hinges on three things: an accurate study count, the right same-day EMG add-on code, and documentation that ties the study count to a supported clinical indication. CPT Code 95913 is straightforward once those fundamentals are in place, but the margin for error is narrow when 13 or more studies are involved and payers are watching for over-utilization.

Pabau’s practice management software helps neurology and physiatry practices structure their documentation workflows so study counts are captured at the point of care, claims are reviewed before submission, and compliance requirements are met consistently. To see how Pabau supports electrodiagnostic and specialty billing workflows, book a demo.

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