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  1. hcup-us.ahrq.gov/db/nation/nass/nassdde.jsp
    February 01, 2025 - Privacy Notice , Viewers & Players Last modified 2/19/25 Back to Top
  2. hcup-us.ahrq.gov/reports/statbriefs/sb111.pdf
    May 01, 2011 - One specific type of headache—migraine—will be highlighted.2 Migraine headaches last 4 to 72 hours … In 2008, the number of visits increased in the summer months and peaked in September.
  3. hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2010-2015.pdf
    January 01, 2015 - On October 1, 2015, hospital administrative data began using ICD-10- CM/PCS, so the first nine months … of 2015 contain ICD-9-CM codes and the last three months contain ICD-10-CM/PCS codes. … o All-cause readmissions: Use discharge months of January through December. … o All-cause readmissions: Use discharge months of January through October. … • Use last record.
  4. hcup-us.ahrq.gov/datainnovations/clinicalcontentenhancementtoolkit/hi24.jsp
    July 01, 2016 - Investigator: Date: Appendix A: Letter of Support Principal Investigator/Program Director (Last … Privacy Notice , Viewers & Players Last modified 7/15/16 Back to Top
  5. hcup-us.ahrq.gov/db/vars/adaywk/nisnote.jsp
    September 01, 2008 - Privacy Notice , Viewers & Players Last modified 9/17/08 Back to Top
  6. hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2020.jsp
    January 01, 2020 - Revision, Clinical Modification (ICD-9-CM) codes and the last 3 months contain ICD-10-CM/PCS codes. … All-cause readmissions: Use discharge months of January through October. … Use last record . … rehabilitation or aftercare is identified based on either of the following: Any record but the last … Privacy Notice , Viewers & Players Last modified 11/23/22 Back to Top
  7. hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2010-2016.jsp
    January 01, 2016 - of 2015 contain ICD-9-CM codes and the last three months contain ICD-10-CM/PCS codes. … All-cause readmissions: Use discharge months of January through December. … All-cause readmissions: Use discharge months of January through October. … Use last record . … Privacy Notice , Viewers & Players Last modified 10/22/18 Back to Top
  8. hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2010-2017.jsp
    January 01, 2017 - of 2015 contain ICD-9-CM codes and the last three months contain ICD-10-CM/PCS codes. … All-cause readmissions: Use discharge months of January through December. … All-cause readmissions: Use discharge months of January through October. … Use last record . … Privacy Notice , Viewers & Players Last modified 3/2/20 Back to Top
  9. hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2015.jsp
    January 01, 2015 - .* On October 1, 2015, hospital administrative data began using ICD-10-CM/PCS, so the first nine months … of 2015 contain ICD-9-CM codes and the last three months contain ICD-10-CM diagnoses and ICD-10-PCS … Nine months of the calendar year 2015 data (ED visits discharged from January 1, 2015 - September 30, … Three months of data with ICD-10-CM/PCS codes (October 1, 2015 to December 31, 2015). … Privacy Notice , Viewers & Players Last modified 3/13/18 Back to Top
  10. hcup-us.ahrq.gov/toolssoftware/revisit/UserGuide-SuppRevisitFilesCD.pdf
    October 01, 2024 - The example looks for a “clean period,” measured in months, with no hospital events for an individual … Software (CCS) for ICD-9-CM diagnosis category 50) as the condition and required a clean period of 6 months … On the first event for a patient, the service must be after clean period, defined as the first six months … * Example 2, Follow-up Care ** Program code ** diagnosis CCS code to examine and clean period (months … period with no condX claims; %let firstYear = 2005; ** first year of data; %let lastYear = 2006; ** last
  11. hcup-us.ahrq.gov/datainnovations/clinicaldata/OverviewAHRQSupportedAddingClinicalDataPilots09.jsp
    November 01, 2010 - Privacy Notice , Viewers & Players Last modified 11/10/10 Back to Top
  12. hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2019.jsp
    January 01, 2019 - Revision, Clinical Modification (ICD-9-CM) codes and the last 3 months contain ICD-10-CM/PCS codes. … All-cause readmissions: Use discharge months of January through October. … Use last record . … or aftercare is identified based on either of the following: Any record but the last … Privacy Notice , Viewers & Players Last modified 10/18/21 Back to Top
  13. hcup-us.ahrq.gov/db/vars/totchg/nisnote.jsp
    September 01, 2008 - California California supplied total charges only for the last 365 days of the stay for stays of more … We adjusted the admission month (AMONTH) by the number of months corresponding to the change in the discharge … Privacy Notice , Viewers & Players Last modified 9/17/08 Back to Top
  14. hcup-us.ahrq.gov/datainnovations/clinicalcontentenhancementtoolkit/hi6.pdf
    October 12, 2011 - , First, MI) OBR-16 XCN 250 *Patient Name (Last, First, MI) PID-5 XPN 250 Physician NPI OBR-16 XCN … Calendar Date: CCYYMMDD with CC = century, YY = last 2 digits of year, and valid ranges of month = … SEQ NAME HHIC Use TYPE R/O LEN 3 Patient ID Medical Record Number CX R 250 5 Patient Name Last^First … Last name and first name are required. … the NPI is transmitted as the ID: 1) NPI or Hospital Physician ID (NPI strongly preferred), 2) last
  15. hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2020.pdf
    January 01, 2020 - o In data year 2015, the first 9 months of the NRD contain International Classification of Diseases, … Ninth Revision, Clinical Modification (ICD-9-CM) codes and the last 3 months contain ICD-10-CM/PCS … o All-cause readmissions: Use discharge months of January through October. … • Use last record. … rehabilitation or aftercare is identified based on either of the following: ▪ Any record but the last
  16. hcup-us.ahrq.gov/reports/statbriefs/sb150.jsp
    March 01, 2013 - In 2010, the rates of ED visits for infectious enteritis were highest in the cold weather months, averaging … The number of inpatient stays and ED visits were highest in the winter months (January through March, … Treat-and-release ED visits were also at their lowest during these months, at 18,800 monthly visits or … Privacy Notice , Viewers & Players Last modified 3/4/13 Back to Top
  17. hcup-us.ahrq.gov/datainnovations/clinicalcontentenhancementtoolkit/hi6.jsp
    July 07, 2016 - LOINC) OBX-3 CE 250 Medical Record Number PID-3 CX 250 Ordering Physician (Last … Type R/O LEN 3 Patient ID Medical Record Number ST R 250 5 Patient Name Last … Calendar Date: CCYYMMDD with CC = century, YY = last 2 digits of year, and valid ranges of month = 01 … Last name and first name are required. … Privacy Notice , Viewers & Players Last modified 7/19/16 Back to Top
  18. Section2 1 (pdf file)

    hcup-us.ahrq.gov/reports/factsandfigures/2007/pdfs/section2_1.pdf
    January 01, 2007 - Principal and Secondary Conditions, 2007 A chronic condition is defined as a condition that lasts 12 months
  19. hcup-us.ahrq.gov/datainnovations/raceethnicitytoolkit/or16.pdf
    June 16, 2014 - Common blocking variables include Last Name, First Name, SSN, and DOB. … Common matching variables include: Last Name, Middle Name, First Name, Sex, DOB, SSN, Race, Address … The variables Last Name, Middle Name, First Name, SSN, and DOB have a specific matching method associated … important for comparison should be listed first and those that are least important should be listed last … For example: SSN, DOB, Last Name, First Name, Middle Name, Sex, Address i.
  20. hcup-us.ahrq.gov/reports/methods/2007_02.pdf
    January 01, 2007 - In the last decade, several other published studies have featured KID data. … KID trends can be estimated in years (discharge year), quarters (discharge quarter), or months (admission … If the analysis is concerned with seasonality, then time should be measured in quarters or months. … For instance, if the length of stay was 45 days in the last example, then the discharge month could … are identified by any principal or secondary diagnosis code in the range of V3000 to V3901 with the last

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