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hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2002.jsp
January 01, 2002 - procedure fields in this data source
PRSYS
1988-1997
Procedure system (ICD-9-CM)
… Although the NIS contains up to 15 diagnoses and 15 procedures, the number of diagnoses and procedures … diagnoses and 6 procedures. … Because very few cases have more than 15 diagnoses or procedures, the diagnosis and procedure vectors … Privacy Notice , Viewers & Players
Last modified 7/22/16
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hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2018.jsp
January 01, 2018 - of the compressed, encrypted data-related files using the same password and third-party zip utility method … Because very few cases have more than 40 diagnoses or more than 25 procedures, the diagnosis and procedure … The choice of an appropriate method for calculating variances for nationwide estimates depends on the … 10-PCS procedures coded on the record
PRDAY1
Number of days from admission to principal procedure … Privacy Notice , Viewers & Players
Last modified 4/5/21
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hcup-us.ahrq.gov/reports/statbriefs/sb182-Medicaid-Uninsured-Hospitalizations-2012.jsp
October 01, 2014 - Summary Trend Tables
Findings-At-A-Glance
Publications
Information About Using HCUP Data
Methods …
1
367,200
5.0
Spondylosis, intervertebral disc disorders, other back … For this report, major operating room (OR) procedures were defined using procedure classes, which categorize … Major OR procedures were identified using all procedure fields (first-listed and secondary) that were … Privacy Notice , Viewers & Players
Last modified 5/12/16
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hcup-us.ahrq.gov/db/nation/nass/NASS_Introduction_2018.jsp
January 01, 2018 - Combined, these updates contributed to changes in the CPT procedures and CCS procedure groups defined … Procedures included on the Supplemental File are limited to Healthcare Common Procedure Coding System … The choice of an appropriate method for calculating variances for nationwide estimates depends on the … (CCS-Services and Procedures) is HCUP software that provides a method for classifying CPT codes and … Privacy Notice , Viewers & Players
Last modified 4/22/21
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hcup-us.ahrq.gov/reports/statbriefs/sb21.jsp
December 21, 2006 - Procedures and Clinical Classifications Software (CCS)
The principal procedure is the procedure that … If two procedures appear to meet this definition, the procedure most related to the principal diagnosis … Secondary procedures are additional procedures performed during the hospital stay. … All-listed procedures include the principal procedure plus these additional secondary procedures. … Privacy Notice , Viewers & Players
Last modified 12/14/06
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hcup-us.ahrq.gov/db/nation/nis/nisdde.jsp
February 01, 2025 - Summary Trend Tables
Findings-At-A-Glance
Publications
Information About Using HCUP Data
Methods … review frequencies for all data elements planned for use in their analysis and to consider analytic methods … The HCUP Methods Series Report #2015-01 provides guidance on alternative approaches to handling missing … ;
Core
PCLASS_VERSION
Version of the Procedure Classes Refined for ICD-10-PCS procedure … Privacy Notice , Viewers & Players
Last modified 2/18/25
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hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2013.jsp
January 01, 2013 - The choice of an appropriate method for calculating variances for nationwide estimates depends on the … ICD-9-CM procedure information
PR_ED1 — PR_ED9
ICD-9-CM procedures performed in ED
PRCCS_ED1 … — PCLASS_ED9
Procedure class for all ICD-9-CM procedures: (1) Minor Diagnostic, (2) Minor Therapeutic … PCLASS_IP1 — PCLASS_IP9
Procedure class for all ICD-9-CM procedures: (1) Minor Diagnostic, (2) … Privacy Notice , Viewers & Players
Last modified 1/4/16
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hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2015.jsp
January 01, 2015 - Because very few cases have more than 30 diagnoses or more than 15 procedures, the diagnosis and procedure … procedures coded on the record
PRDAY1
Number of days from admission to principal procedure … Procedure Class
PCLASS1 - PCLASS15
Procedure Class for all procedures: (1) Minor Diagnostic … procedure
PRDAY2 -PRDAY15
Number of days from admission to secondary procedures
Diagnosis … Privacy Notice , Viewers & Players
Last modified 2/6/18
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hcup-us.ahrq.gov/reports/statbriefs/sb87.pdf
March 01, 2010 - Only 50–76 percent of patients admitted on the weekend
and who underwent procedures for back surgery … Two percent or fewer of two orthopedic procedures, arthroplasty of the
knee and back surgery, were performed … abdominal surgery (exploratory laparotomy) all listed CCS
procedure code 89
– Any diagnosis: Back … For a detailed description of HCUP, more information on the design of the NIS, and methods
to calculate … HCUP Methods Series Report #2003-2. Online. June 2005 (revised June 6,
2005). U.S.
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hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2012.jsp
January 01, 2012 - Because very few cases have more than 25 diagnoses or more than 15 procedures, the diagnosis and procedure … These variance calculations are based on finite–sample theory, which is an appropriate method for obtaining … The choice of an appropriate method for calculating variances for nationwide estimates depends on the … Procedure Class
PCLASS1 - PCLASS15
Procedure Class for all procedures: (1) Minor Diagnostic,
(2 … Privacy Notice , Viewers & Players
Last modified 5/26/16
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hcup-us.ahrq.gov/reports/statbriefs/sb197-Characteristics-Quality-Hospitals-Health-Systems.jsp
December 01, 2015 - Elixhauser Comorbidity Software Refined for ICD-10-CM
Chronic Condition Indicator Refined for ICD-10-CM
Procedure … Elixhauser Comorbidity Software for ICD-9-CM
Utilization Flags for Revenue Center Codes and ICD-9-CM
Procedure … HCUP Methods Series Report #2015-02. February 3, 2015. U.S. … http://www.hcup-us.ahrq.gov/reports/methods/2015_02.pdf . … Privacy Notice , Viewers & Players
Last modified 11/23/15
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hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2012.jsp
January 01, 2012 - The choice of an appropriate method for calculating variances for nationwide estimates depends on the … ICD-9-CM procedure information
PR_ED1 — PR_ED9
ICD-9-CM procedures performed in ED
PRCCS_ED1 … — PCLASS_ED9
Procedure class for all ICD-9-CM procedures: (1) Minor Diagnostic, (2) Minor Therapeutic … PCLASS_IP1 — PCLASS_IP9
Procedure class for all ICD-9-CM procedures: (1) Minor Diagnostic, (2) … Privacy Notice , Viewers & Players
Last modified 6/30/16
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hcup-us.ahrq.gov/nassoverview.jsp
July 01, 2025 - Summary Trend Tables
Findings-At-A-Glance
Publications
Information About Using HCUP Data
Methods … with relatively high procedure volume, a substantial share of procedures in the hospital outpatient … procedure groups defined as in-scope for the NASS sample. … based on CCS-Services and Procedure category are not recommended. … Privacy Notice , Viewers & Players
Last modified 7/16/25
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hcup-us.ahrq.gov/db/nation/nis/reports/2004niscomparisonrpt.jsp
May 01, 2016 - HCUP Method Series Report # 2007-03. Online December 2, 2007. U.S. … 3.87 (0.30)
0.13 (0.01)
0.21** (0.01)
205: Spondylosis; intervertebral disc disorders; other back … 0.08)
3.14
$31,099 (590)
$31,499
205: Spondylosis; intervertebral disc disorders; other back … NIS and MedPAR Comparisons by Principal Procedure, 2004
Principal Procedure
Number of Discharges … Privacy Notice , Viewers & Players
Last modified 5/27/16
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hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2013.jsp
January 01, 2013 - Because very few cases have more than 25 diagnoses or more than 15 procedures, the diagnosis and procedure … The choice of an appropriate method for calculating variances for nationwide estimates depends on the … of procedures coded on the record
PRDAY1
Number of days from admission to principal procedure … Procedure Class
PCLASS1 - PCLASS15
Procedure Class for all procedures: (1) Minor Diagnostic,
(2 … Privacy Notice , Viewers & Players
Last modified 7/25/16
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hcup-us.ahrq.gov/reports/methods/2006_9.pdf
January 01, 2006 - Microsoft Word - CaseforPOAIndicator_final_060806 _2_.doc
HCUP Methods Series
kbr33831
Contact … HCUP Methods Series Report
# 2006-09 Online. December 1, 2006. U.S. … A description of the method used for
calculating standard errors for the NHDS is provided in Appendix … or medical care
• Affective disorders
• Spondylosis, intervertebral disc
disorders, other back … 4.42
(0.11)
4.46 $19,105
(454)
$19,332
205: Spondylosis,
intervertebral disc
disorders, other back
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hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2014.jsp
January 01, 2014 - The choice of an appropriate method for calculating variances for nationwide estimates depends on the … ICD-9-CM procedure information
PR_ED1 — PR_ED9
ICD-9-CM procedures performed in ED
PRCCS_ED1 … — PCLASS_ED9
Procedure class for all ICD-9-CM procedures: (1) Minor Diagnostic, (2) Minor Therapeutic … PCLASS_IP1 — PCLASS_IP9
Procedure class for all ICD-9-CM procedures: (1) Minor Diagnostic, (2) … Privacy Notice , Viewers & Players
Last modified 2/9/18
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hcup-us.ahrq.gov/nedsoverview.jsp
July 01, 2025 - Summary Trend Tables
Findings-At-A-Glance
Publications
Information About Using HCUP Data
Methods … Diagnosis and Procedure Groups Files contains additional information on the ICD-10-CM/PCS diagnoses … and procedures created by the HCUP software tools. … coding system for inpatient hospital procedures. … Privacy Notice , Viewers & Players
Last modified 7/16/25
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hcup-us.ahrq.gov/db/nation/nass/NASS_Introduction_2019.jsp
January 01, 2019 - of the compressed, encrypted data-related files using the same password and third-party zip utility method … Encounter Predictive Model
Creation of the major ambulatory surgery encounter universe requires a method … The choice of an appropriate method for calculating variances for nationwide estimates depends on the … (CCS-Services and Procedures) is HCUP software that provides a method for classifying CPT codes and … Privacy Notice , Viewers & Players
Last modified 7/5/22
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hcup-us.ahrq.gov/reports/spotlights.jsp
June 01, 2018 - Classes Refined for ICD-10-PCS
Tools for CPT and HCPCS Level II
CCS for Services and Procedures … Surgery Flags for Services and Procedures
Tools for ICD-9-CM
Clinical Classifications Software ( … Elixhauser Comorbidity Software for ICD-9-CM
Utilization Flags for Revenue Center Codes and ICD-9-CM
Procedure … Summary Trend Tables
Findings-At-A-Glance
Publications
Information About Using HCUP Data
Methods … Privacy Notice , Viewers & Players
Last modified 6/7/18
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