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Table 1 Medicare Current Beneficiary Survey (MCBS) Variable Names and ICD-9 codes used in classification system

From: Identifying neuropsychiatric disorders in the Medicare Current Beneficiary Survey: the benefits of combining health survey and claims data

Diagnostic Category and Sub-Diagnoses

ICD-9 Codes

Community Health Survey (HS) Variables

Facility HS Variables

Intellectual and Developmental Disorders (ID/DD)*

 Intellectual Disability

317, 318x, 319, V792

ocmental, emcausc1/emcausc2 = 22**

n/a

 Cerebral Palsy

343x

emcausc1/emcausc2 = 9

cerpalsy

 Delay/Pervasive DD

3141, 315xx, 299xx, V93, V98, V99

none

none

 Spina Bifida

741x

none

none

 Chromosomal

7580-3, 7586-9, 7595, 7598

none

none

 Brain: Anomalies, Degenerative

330, 740, 742, 7560, 75555

none

none

 Muscular Dystrophy

3590-2

emcausc1/emcausc2 = 8

none

 Congenital Infections

7710-2

none

none

 Endocrine, Toxic

243, 2530, 7607, 33181

none

none

 Metabolic

270, 2772, 2775, 27781-2, 27785-9

none

none

Psychiatric Disorders

 Schizophrenia/Delusion

295, 297, 2980, 2984, 2989

none

schizoph

 Bipolar

2960-1, 2964-9

none

manicdep

 Depression/Mood

2962-3, 3004, 311,v790,

ocdeprss, emcausc1/ emcausc2 = 34

depress

 Personality

301xx

none

none

 Anxiety/Somatic/Dissociative

3000x, 30011-30015, 30021-30023, 3003-3007, 3008x, 3009, 30981

none

anxiety

 Eating Disorders

3071, 3075x

none

none

 ADHD/Conduct/impulse Control

314xx, 312xx

none

none

 Unspecified

n/a

ocpsycho, emscausc1/2 = 35

n/a

Neurological (Central Nervous System)

 Traumatic Brain Injury

850-4, 8001-4, 8006-9, 8021-4, 8026-9, 8031-4, 8036-9, 8041-4, 8046-9, 95901, 9070, 3102, 2930, 2940

none

braininj

 Stroke

430, 431, 432x, 433xx, 434xx, 437x, 438xx

ocstroke, emcausc1/emcausc2 = 16

stroke

 Epilepsy

3450-5, 3457-9

emcausc1/emcausc2 = 5

seizure

 Aphasia

7843

none

aphasia

 Brain: Hydrocephalus, Degenerative

3313-4, 33183, 33189, 3319, 3481

none

none

 Multiple Sclerosis/Demyelinating

340x, 3411, 3418, 3419

emcausc1/emcausc2 = 7

scleros

 Parkinson/Movement

332, 333.0, 333.4

ocparkin, emcausc1/emcausc2 = 27

parknson

 Brain Cancer

191, 1920-1, 1983

occbrain

none

Dementia

 Alzheimer's

3310

no specific

alzhmr

 Unspecified

290, 2912, 29282, 2941, 2948, 797, 3311, 3312, 33182

ocalzhmr, emcausc1/emcausc2 = 23

dement

  1. *ID/DD Diagnostic Category also used the Minimum Data Set file (ric.mds) variables (ab10a = 0, ab5E = 1); and the facility interview file (ric7) variable "plactype" = 16
  2. **emcausc1 and emcausc2 are the variable names which list the diagnosis (coded as a number) that was the cause of Medicare eligibility for people under 65 at the time of their initial MCBS interview. Only one of the two had to list the diagnosis to be included