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[Pages:7]Data Mining and Statistically Significant Sampling Methodologies
2013 AAPC Regional Conference Dallas, TX
Data Mining and Statistically Significant Sampling Methodologies
Disclaimer
The information in this presentation was current at the time the presentation was complied and does not include specific payer policies or contract language. Always consult CPT?, CMS, and your payers for specific guidance in reporting services. The views expressed in this presentation are simply my interpretations of information I have read, compiled and studied. Much of the information is directly from the AMA, AHA, AAPC, CMS literature and other reputable sources. Sources utilized are listed at the end of the presentation.
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Objectives
? Specify what data is needed for an audit ? Discuss how to select a statistically significant sample ? Identify easy methods for data analysis and trend
identification ? Establish effective scoring methods
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Data Needed
? What is being audited? ? What is the goal of the audit?
? Compliance / Risk ? Education ? What types of providers / specialties will be included? ? Paper or Electronic? ? Is the payment method a factor? ? What payment method(s) are being reviewed?
Data Mining and Statistically Significant Sampling Methodologies 4
Standard Data to Include
? Date of Service ? Patient Name and / or MRN ? Patient Date of Birth ? Provider Name (including Credentials) ? Provider Specialty ? CPT? / HCPCS Codes Reported (including Modifiers) ? ICD-9-CM Codes Reported ? Insurance Carrier (if applicable)
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Additional Data Depending on Audit Objectives
? Both Rendering Provider & Billing Provider ? Related Providers (eg, Surgeon + Anesthesiologist
for Anesthesia Services) ? Electronic Authentication Date and Time (for EHR
notes) ? ICD-10-CM Codes?
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What Role Does Payment Method Play?
? Physician Fee Schedule ? Outpatient Prospective Payment System ? Ambulatory Surgery Centers ? Medicare Risk Plans
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Statistically Significant (SS)
? Involves the random selection of a number of items for inspection
? Required for some `privilege' audits and for certain carriers
? Endorsed by the Office of the Inspector General ? CMS uses to extrapolate overpayments, etc
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Advantages of SS Samples
? Objective and defensible ? Provides a means of advance estimation of sample
size on an objective basis ? Provides an estimate of error ? May be combined and evaluated even if completed
by different auditors
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Basics of Determining a SS Sample Size
? Select the provider(s) ? Select the time period ? Define the universe, sampling unit, and sampling
frame ? Design the sample plan and select the sample ? Review each of the sampling units ? Analyze the data
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Other Ways of Determining SS Sample Size
? Statistician ? RAT-STATS Statistical Software
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Data Analysis
? Often performed in Excel, Access, or via another electronic resource
? Should be performed at various stages ? Pre-audit
? Identify high-risk concerns ? Identify provider coding patterns outside of the "norm"
? Post-audit
? Validate pre-audit concerns ? Reveal other risk areas only discernable through record review
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Trend Recognition
? Pre-Audit Example 1:
Data Mining and Statistically Significant Sampling Methodologies 13
Trend Recognition (cont.)
? Pre-Audit Example 2:
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Trend Recognition (cont.)
? Post-Audit Example 1:
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Trend Recognition (cont.)
? Post-Audit Example 2:
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Scoring Methodologies
? CRABEL ? STAR ? Some states / carriers have their own rules:
cal%20Record%20Review%20Guidelines.pdf
Data Mining and Statistically Significant Sampling Methodologies 17
What Factors Should Affect Scoring Methods?
? Audit type ? Purpose of the scoring method
? How will the score be used? ? What will the consequences of the score be? ? Ensure scoring is applied consistently and fairly ? Payment method ? Audit scope
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References
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