Concept: International Classification of Disease (ICD) Coding in MCHP Data
Last Updated: 2019-01-17
Time Frame | ICD Version Captured |
Notes
|
1970/01/01 to 1972/02/28 | ICD-7 |
* captured using 3-digit code, but Manitoba Health added 3-digit ICDA-8 code using a crosswalk table. * the ICD-7 code is present in the field later used for National Grouping Code (NGC). |
1972/03/01 to 1979/02/28 | ICDA-8 | * captured using 3-digit code. |
1979/03/01 to present | ICD-9-CM |
* captured using 3-digit code. * In December 2018, a 5-digit diagnosis code variable was added to the Medical Services data. If recorded, the first 3-digits of both the 3-digit and 5-digit diagnosis code variables will match exactly. The 5-digit diagnosis code variable applies to records from 2015/16 forward. |
Comments:
- Dates refer to when a claim was processed not the service date.
- In Manitoba, diagnosis codes also include the series "Ann","Bnn" or "Cnn" which are unique to Manitoba Health (prosthetics, Chiropractors, etc).
- No current plan exists for changing to ICD-10-CA. Some jurisdictions, including CIHI, are seriously considering changing to a comprehensive clinical terminology system called SNOMED (Systematized NOmenclature of MEDicine). See Wikipedia - https://en.wikipedia.org/wiki/Systematized_Nomenclature_of_Medicine for more information on SNOMED.
Time Frame | ICD Version Captured |
Notes
|
1970/01/01 to 1979/03/31 | ICDA-8 |
* 1-3 diagnoses and 1 separate
external cause of injury codes (E-Codes)
. * All coded using 4-digit ICDA-8. * DX01 is primary diagnosis. * 0-3 procedures coded using 4-digit ICDA-8. * Out-of-province and out-patient claims have 0-3 diagnoses and 0-1 procedure. 60% of claims in this era are Outpatient Department claims. |
1979/04/01 to 1987/03/31 | ICD-9-CM |
* 1-16 diagnoses coded using 5-digit ICD-9-CM. * DX01 is primary diagnosis. * external cause of injury codes (E-Codes) not captured. * 0-12 procedures coded using 4-digit ICD-9-CM. * Out-of-province admissions and non-budget out-patient claims have 0-3 diagnoses and 0-1 procedure. |
1987/04/01 to 2004/03/31 | ICD-9-CM |
* 1-16 diagnoses coded using 5-digit ICD-9-CM. * DX01 is most responsible diagnosis. * DXTYPE01-DXTYPE16 now exist. * Diagnosis #2 thru 16 can be external cause of injury codes (E-Codes) . * 0-12 procedures coded using 4-digit ICD-9-CM. * Out-of-province admissions and non-budget out-patient claims have 0-3 diagnoses and 0-1 procedure. |
2004/04/01 to present | ICD-10-CA |
For hospital admissions and day surgery in Manitoba Facilities:
* 1-25 diagnoses coded using ICD-10-CA. * DX01 is most responsible diagnosis. * CIHI-based conversion to ICD-9-CM is also present for the 25 diagnoses but unreliable. * 0-20 procedures coded using Canadian Classification of Health Interventions (CCI). |
2004/04/01 to present | ICD-9-CM |
For admissions out of province (Reciprocal or not) and non-budget outpatient contacts:
* 1-3 diagnoses coded using 5-digit ICD-9-CM. * DX01 is most responsible diagnosis. * DX02 and DX03 can be external cause of injury codes (E-Codes) . * 0-1 procedures coded using ICD-9-CM. |
Comments:
- Dates refer to when a claim was processed not the service date.
Time Frame | ICD Version Captured | Notes |
1973/04/01 to 1979/03/31 | ICDA-8 | * 1-3 Admit and 1-3 Separation diagnoses using 4-digit ICDA-8 code. |
1979/04/01 to 2004/06/01 | ICD-9-CM |
* data collects 1-3 Admit and 1-3 Separation diagnoses using 5-digit ICD9-CM. * existing ICDA-8 diagnoses were retained and modified by adding a trailing "$" symbol in the 5th digit. |
2004/06/01 to present |
ICD-9-CM or ICD-10-CA |
* same as above plus new information may be recorded using ICD-10-CA diagnoses codes. |
Comments:
- In the LTC system, diagnoses are captured using the prevalent ICD system in use at a facility at the time. Typically, LTC facilities attached to a hospital use the same ICD version in use at the hospital.
- The LTC system at MCHP, at any given point, contains ALL information for 1973 through to the most recent fiscal year.
- A text variable for each diagnosis filed contains an ICD version qualifier: either "ICD-9-CM" or "ICD-10-CA".
- Some facility data may not follow the time frames outlined above because they did not begin using a different version until later in the time frame window.
Time Frame | ICD Version Captured |
Notes
|
1990/04/01 to 2001/01/19 | ICD-9-CM |
* 1-3 diagnoses coded using 5-digit ICD-9-CM. * 1-5 diagnoses coded using DSM-III Axis codes. * data collected at registration and on status changes. |
2001/01/20 to present | ICD-9-CM |
* 1-3 diagnoses coded using 5-digit ICD-9-CM. * 1-5 diagnoses coded using DSM-IV Axis codes. * data collected at registration and on status changes. |
Comments:
Time Frame | ICD Version Captured | Notes |
1970/01/01 to 1978/12/31 | ICDA-8 | * cause of death and nature of injury are coded in ICDA-8. |
1979/01/01 to 1999/12/31 | ICD-9 | * cause of death and nature of injury are coded in 4-digit ICD-9 (not the same as ICD-9-CM). |
2000/01/01 to present | ICD-10 |
* W.H.O. standard coding for cause of death. * W.H.O. ICD-10 is not entirely compatible with ICD-10-CA. |
Comments:
- Vital Statistics collects only one diagnosis for reporting cause of death.
- Vital Statistics reporting is based on the calendar year, not the fiscal year.