Icd 9 cm coordination and maintenance committee meeting october 8 th 2004
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Promoting Clear Identification of Diabetic Peripheral Neuropathy. ICD-9-CM Coordination and Maintenance Committee Meeting October 8 th , 2004. Edward J. Bastyr III, MD. Overview. Clinical Manifestations and Diagnosis of Diabetic Peripheral Neuropathy Disease Epidemiology

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Icd 9 cm coordination and maintenance committee meeting october 8 th 2004 l.jpg

Promoting Clear Identification of Diabetic Peripheral Neuropathy

ICD-9-CM Coordination and Maintenance Committee MeetingOctober 8th, 2004

Edward J. Bastyr III, MD

1


Overview l.jpg
Overview Neuropathy

  • Clinical Manifestations and Diagnosis of Diabetic Peripheral Neuropathy

  • Disease Epidemiology

  • Inadequacy of Current Diagnostic Codes

  • Proposed Modifications and Clarification

  • Discussion

2


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Diabetic Peripheral Neuropathy Neuropathy

  • Diabetic peripheral neuropathy (DPN) is a frequent complication of diabetes associated with significant morbidity and mortality1

    • Risk factor for ulcers and amputations2

    • Impairs quality of life1

  • Significant resources are spent to treat patients with DPN

    • Estimated total annual cost in US $4.6 - $13.7 billion3

  • Only effective intervention is prevention by tight control of patient’s diabetes

1. Vinik AI, et.al. Diabetologia 2000;43: 957-973.

2. Standards of Medical Care in Diabetes. Diabetes Care. 2004;S1:15-35.

3. Gordois A, et.al. Diabetes Care. 2003;26: 1790-1795

3


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Clinical Manifestations Neuropathy

DPN affects the limbs symmetrically and progresses from distal to proximal over time.

  • DPN is characterized by a stocking and glove distribution:

    • Bilateral symmetrical distribution of signs and symptoms

    • Affects lower limbs first

    • Progresses from distal (toes) to proximal (knee) over time.

Signs and symptoms progress from distal to proximal over time

4

Diabetic Neuropathy (Boulton), 2001


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Diagnosis Neuropathy

  • Symptoms

    • Numbness

    • Tingling

    • Painful Sensations

  • Signs

    • Lost Reflexes, Decreased Sensation

    • Joint Deformity, Skin changes

  • Perception Measures

    • Quantitative Sensory Testing

      • Vibration Detection Threshold

      • Cold Detection Threshold

      • Heat Pain Threshold

  • Objective Measures

    • Electrophysiology (Nerve Conduction Studies)

5


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Epidemiology Neuropathy

Reliable epidemiological information is complicated by differences in: Definition; Methodology and Diagnostic Criteria

Study Population Data Collection Prevalence (%)

Rochester Diabetic Neuropathy 1986 54% - Type I

Study* 45% - Type II

San Luis Valley Diabetes Study† 1984 – 1986 25.8%

Pittsburgh Epidemiology of

Diabetes Complications Study‡ 1984 – 1988 34.0%

DPN diagnosed on basis of: *Positive symptoms and electrophysiological testing1;

† Neurological exam2

‡ Presence of two out of three: abnormal sensory or motor signs, symptoms,

decreased tendon reflexes3

  • Dyck PJ, et.al. Neurology. 1993;43: 817-24.

  • Franklin GM, et.al. Am J Epidemiol 1990;131:633-43.

  • Maser RE, et.al. Diabetes 1989;38(11):1456-61.

6


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Neuropathy Clinical Classification Neuropathy

No Neuropathy

Stage 0

50%

38%

8-12%

1-3%

Abn NCV, NIS<2

NSC<1

Asymptomatic Neuropathy

Stage 1

Abn NCV, NIS>2,

NSC <1

Abn NCV, NIS>2

NIS(Q21)<4, NSC>1

Symptomatic Neuropathy

Stage 2

Abn NCV, NIS>2

NIS(Q21)>4, NSC>1

Disabling Symptoms

- Ulcers; deformity;

non-traumatic amputation

Disabling Neuropathy

Stage 3

NCV=nerve conduction velocity

NIS=neuropathy impairment score

NSC=neuropathy symptom and change score

Abnormal NCV and

Nerve Exam

7

Dyck PJ, et.al. Neurology. 1993;43: 817-24.


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Inadequacy of Existing Codes Neuropathy

Diabetic Polyneuropathy (357.2)

  • Poorly defined epidemiology due to variations in diagnosis criteria

  • DPN is a progressive disorder, current code does not allow for following disease progression

  • Lack of unique codes results in the loss of valuable information

    • Epidemiology

    • Morbidity

    • Utilization of services and costs

8


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Modification to Diabetic Polyneuropathy Neuropathy

  • Maintain 357.2 Polyneuropathy in Diabetes, but require that it coded to 5th digit

  • Continue to note under 357.2 code first underlying disease (250.6)

  • Create four unique codes to describe the different stages of Diabetic Peripheral Neuropathy

    357.20 Unspecified Polyneuropathy in Diabetes

    357.21 Asymptomatic Neuropathy in Diabetes

    357.22 Symptomatic Neuropathy in Diabetes

    357.23 Disabling Neuropathy in Diabetes

9


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Conclusion Neuropathy

  • DPN is a frequent, progressive complication of diabetes associated with significant morbidity and costs

  • Current ICD-9-CM codes do not allow for categorization of the different stages of DPN resulting in the loss of valuable information on the epidemiology and costs of the disease

  • Modification of current Polyneuropathy in Diabetes (357.2) code will better represent the clinical presentation of DPN

    • 357.20 Unspecified Polyneuropathy in Diabetes

    • 357.21 Asymptomatic Neuropathy in Diabetes

    • 357.22 Symptomatic Neuropathy in Diabetes

    • 357.23 Disabling Neuropathy in Diabetes

10


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11 Neuropathy


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