Identifying and distinguishing cases of parkinsonism and Parkinson's disease using ICD-9 CM codes and pharmacy data

Kari Swarztrauber, Jane Anau, Dawn Peters

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Administrative databases have the potential to assess quality and cost of care for parkinsonism and Parkinson's disease. However, the validity of findings is limited by our understanding of how cases are identified. Patient records listing International Classification of Diseases, Version 9, Clinical Modification (ICD-9 CM) codes for parkinsonism (n = 2,076) and dopaminergic medications (n = 2,798) were pulled from fiscal years 1999 to 2001 for patients in the Pacific Northwest Veterans Administration. Samples of these records (n = 397) and records without these ICD-9 CM codes (n = 500) were reviewed, and clinical data were extracted. The accuracy of administrative data to identify and distinguish between Parkinson's disease and parkinsonism was calculated. A total of 37.9% of parkinsonism cases were detected using pharmacy data and ICD-9 CM codes compared to 18.7% by using ICD-9 CM codes alone. The ICD-9 CM code for paralysis agitans (332.0) did not distinguish between probable Parkinson's disease and other causes of parkinsonism, whereas the ICD-9 CM code for degenerative basal ganglia disorder (333.0) predicted having secondary parkinsonism (odds ratio [OR] = 5.0) as well as dopa-responsiveness in patients without secondary parkinsonism (OR = 4.5). Administrative data are limited in the ability to identify parkinsonism. The ICD-9 CM code, 332.0, which is generally considered the code to identify Parkinson's disease, did not distinguish between parkinsonism and Parkinson's disease.

Original languageEnglish (US)
Pages (from-to)964-970
Number of pages7
JournalMovement Disorders
Volume20
Issue number8
DOIs
StatePublished - Aug 2005

Fingerprint

Parkinsonian Disorders
International Classification of Diseases
Parkinson Disease
Secondary Parkinson Disease
Odds Ratio
Northwestern United States
Basal Ganglia Diseases
United States Department of Veterans Affairs
Dihydroxyphenylalanine
Quality of Health Care
Databases
Costs and Cost Analysis

Keywords

  • Administrative data
  • ICD-9 CM codes
  • Parkinson's disease
  • Prevalence
  • Sensitivity and specificity

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

Cite this

Identifying and distinguishing cases of parkinsonism and Parkinson's disease using ICD-9 CM codes and pharmacy data. / Swarztrauber, Kari; Anau, Jane; Peters, Dawn.

In: Movement Disorders, Vol. 20, No. 8, 08.2005, p. 964-970.

Research output: Contribution to journalArticle

@article{cefde873bfe74b679d529ff041edafe0,
title = "Identifying and distinguishing cases of parkinsonism and Parkinson's disease using ICD-9 CM codes and pharmacy data",
abstract = "Administrative databases have the potential to assess quality and cost of care for parkinsonism and Parkinson's disease. However, the validity of findings is limited by our understanding of how cases are identified. Patient records listing International Classification of Diseases, Version 9, Clinical Modification (ICD-9 CM) codes for parkinsonism (n = 2,076) and dopaminergic medications (n = 2,798) were pulled from fiscal years 1999 to 2001 for patients in the Pacific Northwest Veterans Administration. Samples of these records (n = 397) and records without these ICD-9 CM codes (n = 500) were reviewed, and clinical data were extracted. The accuracy of administrative data to identify and distinguish between Parkinson's disease and parkinsonism was calculated. A total of 37.9{\%} of parkinsonism cases were detected using pharmacy data and ICD-9 CM codes compared to 18.7{\%} by using ICD-9 CM codes alone. The ICD-9 CM code for paralysis agitans (332.0) did not distinguish between probable Parkinson's disease and other causes of parkinsonism, whereas the ICD-9 CM code for degenerative basal ganglia disorder (333.0) predicted having secondary parkinsonism (odds ratio [OR] = 5.0) as well as dopa-responsiveness in patients without secondary parkinsonism (OR = 4.5). Administrative data are limited in the ability to identify parkinsonism. The ICD-9 CM code, 332.0, which is generally considered the code to identify Parkinson's disease, did not distinguish between parkinsonism and Parkinson's disease.",
keywords = "Administrative data, ICD-9 CM codes, Parkinson's disease, Prevalence, Sensitivity and specificity",
author = "Kari Swarztrauber and Jane Anau and Dawn Peters",
year = "2005",
month = "8",
doi = "10.1002/mds.20479",
language = "English (US)",
volume = "20",
pages = "964--970",
journal = "Movement Disorders",
issn = "0885-3185",
publisher = "John Wiley and Sons Inc.",
number = "8",

}

TY - JOUR

T1 - Identifying and distinguishing cases of parkinsonism and Parkinson's disease using ICD-9 CM codes and pharmacy data

AU - Swarztrauber, Kari

AU - Anau, Jane

AU - Peters, Dawn

PY - 2005/8

Y1 - 2005/8

N2 - Administrative databases have the potential to assess quality and cost of care for parkinsonism and Parkinson's disease. However, the validity of findings is limited by our understanding of how cases are identified. Patient records listing International Classification of Diseases, Version 9, Clinical Modification (ICD-9 CM) codes for parkinsonism (n = 2,076) and dopaminergic medications (n = 2,798) were pulled from fiscal years 1999 to 2001 for patients in the Pacific Northwest Veterans Administration. Samples of these records (n = 397) and records without these ICD-9 CM codes (n = 500) were reviewed, and clinical data were extracted. The accuracy of administrative data to identify and distinguish between Parkinson's disease and parkinsonism was calculated. A total of 37.9% of parkinsonism cases were detected using pharmacy data and ICD-9 CM codes compared to 18.7% by using ICD-9 CM codes alone. The ICD-9 CM code for paralysis agitans (332.0) did not distinguish between probable Parkinson's disease and other causes of parkinsonism, whereas the ICD-9 CM code for degenerative basal ganglia disorder (333.0) predicted having secondary parkinsonism (odds ratio [OR] = 5.0) as well as dopa-responsiveness in patients without secondary parkinsonism (OR = 4.5). Administrative data are limited in the ability to identify parkinsonism. The ICD-9 CM code, 332.0, which is generally considered the code to identify Parkinson's disease, did not distinguish between parkinsonism and Parkinson's disease.

AB - Administrative databases have the potential to assess quality and cost of care for parkinsonism and Parkinson's disease. However, the validity of findings is limited by our understanding of how cases are identified. Patient records listing International Classification of Diseases, Version 9, Clinical Modification (ICD-9 CM) codes for parkinsonism (n = 2,076) and dopaminergic medications (n = 2,798) were pulled from fiscal years 1999 to 2001 for patients in the Pacific Northwest Veterans Administration. Samples of these records (n = 397) and records without these ICD-9 CM codes (n = 500) were reviewed, and clinical data were extracted. The accuracy of administrative data to identify and distinguish between Parkinson's disease and parkinsonism was calculated. A total of 37.9% of parkinsonism cases were detected using pharmacy data and ICD-9 CM codes compared to 18.7% by using ICD-9 CM codes alone. The ICD-9 CM code for paralysis agitans (332.0) did not distinguish between probable Parkinson's disease and other causes of parkinsonism, whereas the ICD-9 CM code for degenerative basal ganglia disorder (333.0) predicted having secondary parkinsonism (odds ratio [OR] = 5.0) as well as dopa-responsiveness in patients without secondary parkinsonism (OR = 4.5). Administrative data are limited in the ability to identify parkinsonism. The ICD-9 CM code, 332.0, which is generally considered the code to identify Parkinson's disease, did not distinguish between parkinsonism and Parkinson's disease.

KW - Administrative data

KW - ICD-9 CM codes

KW - Parkinson's disease

KW - Prevalence

KW - Sensitivity and specificity

UR - http://www.scopus.com/inward/record.url?scp=26444478696&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=26444478696&partnerID=8YFLogxK

U2 - 10.1002/mds.20479

DO - 10.1002/mds.20479

M3 - Article

VL - 20

SP - 964

EP - 970

JO - Movement Disorders

JF - Movement Disorders

SN - 0885-3185

IS - 8

ER -