Electrodiagnostic Medicine (April 2002)

Why This Topic Matters

It helps readers understand how electrodiagnostic studies are organized and why accurate reporting and documentation matter in neuromuscular workups. The article also provides context for payer scrutiny, test utilization, and the broader coding framework used for these services.

Article Sections

1. Scope of Electrodiagnostic Medicine

   Introduces the role of electrodiagnostic consultation and the kinds of patients who are referred for evaluation. It also explains the relationship between symptoms, working diagnoses, and final diagnostic labeling.

2. Indications

   Summarizes the general purposes of electrodiagnostic testing across peripheral and central nervous system evaluation. This section describes broad clinical uses such as localization, characterization, and follow-up of neuromuscular conditions.

3. Acceptable Diagnostic Codes

   Discusses the use of diagnosis coding in electrodiagnostic medicine and notes that symptom-based and disease-based coding may both be relevant. It also frames the relationship between diagnostic coding and the performed service.

4. Nerve Conduction Studies (95900-95904)

   Reviews nerve conduction study categories, how these studies fit into the electrodiagnostic examination, and the general reporting information expected. The section also addresses documentation and service-level distinctions across study types.

5. Needle Electromyography (EMG) (95860-95870)

   Covers needle EMG as a major component of electrodiagnostic evaluation and outlines its broad clinical role. It includes the main EMG subcategories discussed in the article and the associated reporting framework.

6. Single Fiber Electromyography (95872)

   Describes single fiber electromyography as a specialized electrodiagnostic study used in neuromuscular assessment. The section focuses on the general nature of the test and the type of information it provides.

7. Needle Electromyography of Anal or Urethral Sphincter, Any Technique (51785)

   Addresses sphincter-related electrodiagnostic testing in selected sacral-root or sphincter-integration evaluations. It explains the clinical context in which this study may be considered.

8. Late Responses: H-Reflex and F-Wave Studies

   Introduces late response studies and their role in assessing more proximal nerve conduction. It provides the general clinical settings in which these studies may contribute to the overall evaluation.

9. H-Reflex Studies (95934 and 95936)

   Summarizes the H-reflex portion of late response testing and the way it is discussed in the article. The section also covers the documentation expectations associated with these studies.

10. Nerve Conduction Study with F-Wave Study (95903)

    Reviews the place of F-wave studies within nerve conduction testing and how they relate to motor study evaluation. It also discusses the general reporting context for combining these studies.

11. Blink Reflexes (95933)

    Covers blink reflex testing as a specialized electrodiagnostic study used to assess cranial nerve and brainstem pathways. The section describes the general types of information the test can provide.

12. Neuromuscular Junction Studies (NMJ) (95937)

    Discusses repetitive stimulation studies used in neuromuscular junction evaluation. It outlines the test’s role within electrodiagnostic medicine and the general reporting elements expected.

13. Somatosensory Evoked Potentials (SEPs) (95925-95927)

    Summarizes SEP testing as an extension of electrodiagnostic evaluation involving sensory pathway assessment. The section addresses common uses, reporting considerations, and broad procedural context.

14. Autonomic Nervous System Function Testing (95921-95923)

    Covers autonomic testing categories used to evaluate different components of autonomic function. It discusses the broad purpose of these studies and the general types of autonomic assessment included.

15. Maximum Number of Tests Necessary in 90% of Cases

    Explains the article’s discussion of test utilization and the concept of a reasonable maximum number of studies for common diagnostic categories. It also notes the role of documentation and physician judgment in broader utilization review.

16. Carpal Tunnel Syndrome (CTS)

    Addresses the electrodiagnostic evaluation context for suspected CTS and the general testing considerations described in the article. The section situates CTS within the broader utilization guidance.

17. Radiculopathy

    Describes the electrodiagnostic evaluation context for radiculopathy and how it fits within broader neuromuscular assessment. It also discusses the general role of complementary studies in this diagnostic category.

18. Mononeuropathy and Polyneuropathy/Mononeuropathy Multiplex

    Provides a broad distinction between focal and diffuse peripheral nerve disorders in the electrodiagnostic setting. This section frames how these conditions are approached at a high level.

19. Mononeuropathy

    Covers the mononeuropathy diagnostic category within electrodiagnostic evaluation. It describes the general purpose of testing in this context and the need to distinguish related disorders.

20. Polyneuropathy/Mononeuropathy Multiplex

    Reviews electrodiagnostic evaluation of diffuse or multifocal peripheral nerve disease. The section explains the broad rationale for using multiple study types in this category.

21. Myopathy

    Summarizes the role of electrodiagnostic testing in evaluating muscle disease. It places myopathy within the article’s broader diagnostic framework.

22. Motor Neuronopathy

    Discusses electrodiagnostic evaluation of motor neuron disease in general terms. The section explains how this category fits into the article’s diagnostic examples and test utilization context.

23. Plexopathy

    Covers electrodiagnostic assessment of plexus disorders affecting the upper or lower extremities. It situates plexopathy among the main differential diagnostic categories discussed in the article.

24. Neuromuscular Junction

    Describes the evaluation of neuromuscular transmission disorders using electrodiagnostic techniques. The section places this category in the article’s broader diagnostic and utilization framework.

25. Timing of Testing after an Injury

    Addresses when electrodiagnostic testing may be informative after an injury. It discusses timing as a general consideration in selecting and interpreting studies.

26. Frequency of Electrodiagnostic Testing in a Given Patient

    Reviews circumstances that may justify repeat electrodiagnostic evaluation over time. The section focuses on longitudinal assessment and documentation context.

27. List of Separate Nerves for Reporting Nerve Conduction Studies (95900-95904)

    Provides a detailed listing of nerves and nerve groupings referenced for reporting nerve conduction studies. It functions as a reference section tied to the nerve conduction study code family.