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CPT 95872: Single-Fiber Electromyography (SFEMG)

CPT code 95872 represents single-fiber electromyography (SFEMG), a specialized electrodiagnostic procedure that records electrical activity from individual muscle fibers to assess neuromuscular transmission by measuring jitter, blocking, and fiber density. SFEMG is clinically important for diagnosing conditions such as myasthenia gravis and other disorders of the neuromuscular junction and motor unit, and it plays a role in guiding treatment decisions and specialist referrals nationwide.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context, typical sites of service, and common billing considerations. The publication summarizes benchmarking information where available, highlights relevant policy and coverage themes affecting access to SFEMG, and outlines documentation and coding points that influence claim acceptance and reimbursement workflows.

This report is written for a national audience of clinicians, practice managers, and billing professionals seeking a clear, policy-aware explanation of CPT code 95872, its clinical purpose, payer coverage landscape, and operational implications for delivering and billing specialized electrodiagnostic testing.

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Billing Code Overview

CPT code 95872 describes a single-fiber electromyography (SFEMG) procedure in which a provider records and studies the electrical activity of individual muscle fibers using a specialized single-fiber needle electrode. The examination measures parameters such as jitter, blocking, and fiber density to identify electrical activity from individual muscle fibers and evaluate neuromuscular transmission.

Service Type: Diagnostic electrodiagnostic testing — single-fiber EMG

Typical Site of Service: Hospital outpatient department, ambulatory surgical center, or specialized neurodiagnostic laboratory

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CPT 95872: Single-Fiber Electromyography (SFEMG)

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Billing Code Overview

Service Type: Diagnostic electrodiagnostic testing — single-fiber EMG

Typical Site of Service: Hospital outpatient department, ambulatory surgical center, or specialized neurodiagnostic laboratory

Clinical & Coding Specifications

Clinical Context

A patient in their mid-50s presents to an outpatient neuromuscular clinic with progressive fatigable weakness, ptosis, and intermittent diplopia over several months. The referring neurologist suspects a neuromuscular junction disorder such as myasthenia gravis or a motor endplate disorder after bedside exam and positive fatigue testing. Prior to initiating immunotherapy, the clinician schedules a specialized electrophysiologic study: single-fiber electromyography using 95872 to measure jitter, blocking, and fiber density in selected clinical muscles (e.g., orbicularis oculi, frontalis, extensor digitorum).

Pre-procedure workflow includes review of medication list (holding acetylcholinesterase inhibitors per local protocol), focused neurologic exam, informed consent, and explanation of discomfort and small-needle risks. The procedure is performed in an outpatient electromyography laboratory or neurology clinic with continuous monitoring of patient comfort. The provider inserts a single-fiber needle electrode into target muscles, records trains of action potentials, and measures jitter and blocking across multiple sites per muscle. Findings are documented in the procedure note with numeric jitter values, presence/absence of blocking, and interpretation (normal, increased jitter, neuromuscular transmission defect). Results are used to confirm the diagnosis, guide additional testing (e.g., repetitive nerve stimulation, serologic testing), and inform treatment planning such as initiation of pyridostigmine or immunomodulatory therapy.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	When reporting only the physician’s interpretation and report separate from technical component ownership of equipment or facility billing.
`TC`	Technical component	When the facility bills for equipment, supplies, and non-physician staff but not the physician’s professional interpretation.
`59`	Distinct procedural service	When `95872` is a separate and distinct service from other procedures performed during the same session (e.g., separate muscle group testing) and not normally billed together.
`76`	Repeat procedure by same physician	When a repeat `95872` is performed subsequent to the initial study on the same day by the same provider (for example, after repositioning).
`77`	Repeat procedure by different physician	When a second physician repeats `95872` on the same day (note: `77` is not in the provided list; therefore not included).
`52`	Reduced services	When the study is partially reduced or not fully completed due to patient intolerance or other limiting factors.
`53`	Discontinued procedure	When the procedure is started but stopped for patient safety or intolerance before meaningful data obtained.
`59`	Distinct procedural service	When `95872` represents a distinct service from other billed electrodiagnostic procedures during the same encounter.
`76`	Repeat procedure by same physician	For repeat testing after repositioning or troubleshooting within the same day.
`62`	Two surgeons or providers	When two qualifying providers of different specialties share performance responsibility (rare for `95872`).
`78`	Return to operating room following prior procedure	Not typically applicable to outpatient `95872`, included when relevant for inpatient surgical contexts.
`22`	Unusual procedural services	When the procedure required substantially greater effort or time than typical single-fiber studies.
`51`	Multiple procedures	When `95872` is billed with other distinct procedures during the same encounter and payer requires this modifier for multiple-procedure payment rules.
`59`	Distinct procedural service	Used judiciously to indicate distinct/separate service; clinical documentation must support distinction.

Taxonomy Code	Specialty	Notes
2084P0800X	Neurology	Neurologists commonly perform and interpret single-fiber EMG studies.
2084N0400X	Neurophysiology	Clinical neurophysiologists or EMG specialists perform advanced electrodiagnostic testing.
207R00000X	Physiatry (Physical Medicine & Rehabilitation)	Physiatrists with EMG training may perform `95872` in outpatient electrodiagnostic labs.
207L00000X	Neuromuscular Medicine	Specialists focused on neuromuscular disorders commonly perform single-fiber EMG.
208D00000X	Neurology - Clinical Neurophysiology	Subspecialists who interpret complex electrophysiology studies including single-fiber EMG.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`G70.00`	Myasthenia gravis without (acute) exacerbation	Primary disorder of neuromuscular transmission; single-fiber EMG (`95872`) is highly sensitive for detecting increased jitter and blocking.
`G70.01`	Myasthenia gravis with (acute) exacerbation	Used when patient has worsening symptoms; `95872` assists in confirming neuromuscular transmission impairment during exacerbation.
`G70.9`	Neuromuscular junction disorder, unspecified	When a specific diagnosis is pending, `95872` helps characterize transmission defects.
`G71.1`	Muscular dystrophy	In select cases, single-fiber EMG may be used to differentiate myopathic vs neuromuscular junction pathology.
`G72.89`	Other specified myopathies	Used when specialized testing is needed to evaluate abnormal neuromuscular transmission or muscle fiber activity.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`95860`	Needle electromyography; 1 extremity, with or without related paraspinal areas	Performed in the same encounter to evaluate muscle electrical activity in broader muscle groups complementary to single-fiber EMG.
`95861`	Needle electromyography; 2 extremities, with or without related paraspinal areas	Used when multiple limb regions require standard EMG testing in addition to `95872`.
`95900`	Nerve conduction studies; 1-2 studies	Nerve conduction studies are commonly performed before or alongside single-fiber EMG to assess peripheral nerve function and help localize pathology.
`95907`	Nerve conduction studies; motor conduction, each nerve	Performed for detailed motor nerve assessment as part of an electrodiagnostic workup complementing `95872`.
`95886`	Needle EMG, thoracic paraspinal and/or trunk muscles; 1 or 2 muscles	May be performed if trunk muscles are clinically implicated along with single-fiber testing of facial muscles.

CPT 95860: Needle Electromyography (Needle EMG) with Insertion Activity

CPT-95861-NEEDLE-ELECTROMYOGRAPHY-DIAGNOSTIC-EMG

CPT 95861: Needle Electromyography, Diagnostic Recording

CPT-95863-NEEDLE-ELECTROMYOGRAPHY-AUDIBLE-RECORDING

CPT 95863: Needle Electromyography with Audible Recording

CPT-95864-NEEDLE-ELECTROMYOGRAPHY-EMG-RECORDING

CPT 95864: Needle Electromyography (EMG) Recording of Skeletal Muscle

CPT-95865-LARYNGEAL-NEEDLE-ELECTROMYOGRAPHY

CPT 95865: Needle Electromyography of Laryngeal Muscles

CPT-95866-NEEDLE-EMG-SPONTANEOUS-RESPIRATION

CPT 95866: Needle EMG Recording During Spontaneous Respiration

CPT-95867-NEEDLE-EMG-CRANIAL-NERVE-INNERVATED-MUSCLES

CPT 95867: Needle EMG of Cranial Nerve–Innervated Muscles, Computerized Recording

CPT-95868-NEEDLE-EMG-CRANIAL-NERVE-INNERVATED-MUSCLES-BILATERAL

CPT 95868: Needle EMG of Cranial Nerve–Innervated Muscles, Bilateral

CPT-95869-NEEDLE-ELECTROMYOGRAPHY-AUDIBLE-RECORDING

CPT 95869: Needle Electromyography with Audible Recording

CPT-95870-NEEDLE-ELECTROMYOGRAPHY-LIMITED-STUDY

CPT 95870: Needle Electromyography, Limited Study

Showing 1–10 of 12

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	When reporting only the physician’s interpretation and report separate from technical component ownership of equipment or facility billing.
`TC`	Technical component	When the facility bills for equipment, supplies, and non-physician staff but not the physician’s professional interpretation.
`59`	Distinct procedural service	When `95872` is a separate and distinct service from other procedures performed during the same session (e.g., separate muscle group testing) and not normally billed together.
`76`	Repeat procedure by same physician	When a repeat `95872` is performed subsequent to the initial study on the same day by the same provider (for example, after repositioning).
`77`	Repeat procedure by different physician	When a second physician repeats `95872` on the same day (note: `77` is not in the provided list; therefore not included).
`52`	Reduced services	When the study is partially reduced or not fully completed due to patient intolerance or other limiting factors.
`53`	Discontinued procedure	When the procedure is started but stopped for patient safety or intolerance before meaningful data obtained.
`59`	Distinct procedural service	When `95872` represents a distinct service from other billed electrodiagnostic procedures during the same encounter.
`76`	Repeat procedure by same physician	For repeat testing after repositioning or troubleshooting within the same day.
`62`	Two surgeons or providers	When two qualifying providers of different specialties share performance responsibility (rare for `95872`).
`78`	Return to operating room following prior procedure	Not typically applicable to outpatient `95872`, included when relevant for inpatient surgical contexts.
`22`	Unusual procedural services	When the procedure required substantially greater effort or time than typical single-fiber studies.
`51`	Multiple procedures	When `95872` is billed with other distinct procedures during the same encounter and payer requires this modifier for multiple-procedure payment rules.
`59`	Distinct procedural service	Used judiciously to indicate distinct/separate service; clinical documentation must support distinction.

Taxonomy Code	Specialty	Notes
2084P0800X	Neurology	Neurologists commonly perform and interpret single-fiber EMG studies.
2084N0400X	Neurophysiology	Clinical neurophysiologists or EMG specialists perform advanced electrodiagnostic testing.
207R00000X	Physiatry (Physical Medicine & Rehabilitation)	Physiatrists with EMG training may perform `95872` in outpatient electrodiagnostic labs.
207L00000X	Neuromuscular Medicine	Specialists focused on neuromuscular disorders commonly perform single-fiber EMG.
208D00000X	Neurology - Clinical Neurophysiology	Subspecialists who interpret complex electrophysiology studies including single-fiber EMG.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`G70.00`	Myasthenia gravis without (acute) exacerbation	Primary disorder of neuromuscular transmission; single-fiber EMG (`95872`) is highly sensitive for detecting increased jitter and blocking.
`G70.01`	Myasthenia gravis with (acute) exacerbation	Used when patient has worsening symptoms; `95872` assists in confirming neuromuscular transmission impairment during exacerbation.
`G70.9`	Neuromuscular junction disorder, unspecified	When a specific diagnosis is pending, `95872` helps characterize transmission defects.
`G71.1`	Muscular dystrophy	In select cases, single-fiber EMG may be used to differentiate myopathic vs neuromuscular junction pathology.
`G72.89`	Other specified myopathies	Used when specialized testing is needed to evaluate abnormal neuromuscular transmission or muscle fiber activity.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`95860`	Needle electromyography; 1 extremity, with or without related paraspinal areas	Performed in the same encounter to evaluate muscle electrical activity in broader muscle groups complementary to single-fiber EMG.
`95861`	Needle electromyography; 2 extremities, with or without related paraspinal areas	Used when multiple limb regions require standard EMG testing in addition to `95872`.
`95900`	Nerve conduction studies; 1-2 studies	Nerve conduction studies are commonly performed before or alongside single-fiber EMG to assess peripheral nerve function and help localize pathology.
`95907`	Nerve conduction studies; motor conduction, each nerve	Performed for detailed motor nerve assessment as part of an electrodiagnostic workup complementing `95872`.
`95886`	Needle EMG, thoracic paraspinal and/or trunk muscles; 1 or 2 muscles	May be performed if trunk muscles are clinically implicated along with single-fiber testing of facial muscles.

CPT 95860: Needle Electromyography (Needle EMG) with Insertion Activity

CPT-95861-NEEDLE-ELECTROMYOGRAPHY-DIAGNOSTIC-EMG

CPT 95861: Needle Electromyography, Diagnostic Recording

CPT-95863-NEEDLE-ELECTROMYOGRAPHY-AUDIBLE-RECORDING

CPT 95863: Needle Electromyography with Audible Recording

CPT-95864-NEEDLE-ELECTROMYOGRAPHY-EMG-RECORDING

CPT 95864: Needle Electromyography (EMG) Recording of Skeletal Muscle

CPT-95865-LARYNGEAL-NEEDLE-ELECTROMYOGRAPHY

CPT 95865: Needle Electromyography of Laryngeal Muscles

CPT-95866-NEEDLE-EMG-SPONTANEOUS-RESPIRATION

CPT 95866: Needle EMG Recording During Spontaneous Respiration

CPT-95867-NEEDLE-EMG-CRANIAL-NERVE-INNERVATED-MUSCLES

CPT 95867: Needle EMG of Cranial Nerve–Innervated Muscles, Computerized Recording

CPT-95868-NEEDLE-EMG-CRANIAL-NERVE-INNERVATED-MUSCLES-BILATERAL

CPT 95868: Needle EMG of Cranial Nerve–Innervated Muscles, Bilateral

CPT-95869-NEEDLE-ELECTROMYOGRAPHY-AUDIBLE-RECORDING

CPT 95869: Needle Electromyography with Audible Recording

CPT-95870-NEEDLE-ELECTROMYOGRAPHY-LIMITED-STUDY

CPT 95870: Needle Electromyography, Limited Study

Showing 1–10 of 12

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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CPT 95872: Single-Fiber Electromyography (SFEMG)

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Billing Code Overview

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CPT 95872: Single-Fiber Electromyography (SFEMG)

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References