--- title: How Coding Accuracy Impacts CMS Hospital Compare Scores description: Learn how medical coding accuracy influences CMS Hospital Compare mortality and patient safety measures—and how healthcare organizations can protect public quality reporting. image: https://hiacode.com/hubfs/iStock-2218477072.jpg --- # How Coding Accuracy Impacts CMS Hospital Compare Scores ![Brett Randolph, RHIT, CDIP, CCS](https://hiacode.com/hubfs/Employee%20Pic%20(1)-1.png) [Brett Randolph, RHIT, CDIP, CCS](https://hiacode.com/blog/author/brett-randolph) Feb 09, 2026 [Industry News](https://hiacode.com/blog/tag/industry-news) [Medical Coding Tips](https://hiacode.com/blog/tag/medical-coding-tips) ![How Coding Accuracy Impacts CMS Hospital Compare Scores](https://hiacode.com/hubfs/iStock-2218477072.jpg) - Share on: - [![](https://hiacode.com/hubfs/Facebook%20svg.svg)](http://www.facebook.com/share.php?u=https://hiacode.com/blog/coding-accuracy-cms-hospital-compare-measures) - [![](https://hiacode.com/hs-fs/hubfs/twitter.png?width=32&height=32&name=twitter.png)](https://twitter.com/intent/tweet?text=I+found+this+interesting+blog+post&url=https://hiacode.com/blog/coding-accuracy-cms-hospital-compare-measures) - [![](https://hiacode.com/hubfs/LinkedIn%20svg.svg)](http://www.linkedin.com/shareArticle?mini=true&url=https://hiacode.com/blog/coding-accuracy-cms-hospital-compare-measures) - [![](https://hiacode.com/hubfs/mdi_email.svg)](mailto:?subject=Check%20out%20https://hiacode.com/blog/coding-accuracy-cms-hospital-compare-measures%20&body=Check%20out%20https://hiacode.com/blog/coding-accuracy-cms-hospital-compare-measures&media=https://hiacode.com/hubfs/iStock-2218477072.jpg) - ![](https://hiacode.com/hubfs/entypo_link.svg) copied *CMS Hospital Compare is a public reporting platform used across the United States to evaluate hospital performance related to quality, patient safety, and outcomes. While not all measures are influenced by coding, several Hospital Compare metrics rely on administrative claims data—making coding and documentation accuracy a critical factor in how performance is calculated and interpreted by Centers for Medicare & Medicaid Services. * *Incomplete or inaccurate coding can distort mortality rates, patient safety indicators, and utilization measures, potentially misrepresenting the care delivered. This blog outlines practical coding strategies healthcare organizations can use to support accurate CMS Hospital Compare reporting, strengthen data integrity, and ensure publicly reported results reflect true clinical complexity rather than documentation or coding gaps.* --- CMS Hospital Compare is a public-facing platform that allows patients, payers, and regulators to compare hospital performance across quality, safety, and outcomes measures. While many Hospital Compare metrics are driven by clinical care processes and patient experience, coding and documentation accuracy play a meaningful role in how certain outcomes are calculated and interpreted. Inaccurate or incomplete coding can distort mortality, patient safety, and utilization measures—creating a picture of performance that may not fully reflect the care provided. A strategic, quality-focused coding approach helps ensure Hospital Compare data is based on accurate clinical representation rather than documentation or coding gaps. ## Here are five proven strategies to help coding teams support accurate CMS Hospital Compare reporting. ### 1. Understand Which Hospital Compare Measures Are Coding-Sensitive Not all Hospital Compare measures are influenced by coding, but several outcomes-based metrics rely on administrative claims data, including mortality and patient safety indicators. - Strategy: Identify which Hospital Compare measures use claims-based methodologies. Focus coding reviews on areas tied to mortality, complications, and utilization rather than process or patient experience measures that fall outside coding’s influence. ### 2. Strengthen Mortality-Related Coding Accuracy Mortality measures are risk-adjusted based on diagnoses, procedures, and documented severity. Missed comorbidities, incorrect principal diagnosis selection, or underreported acuity can skew expected mortality calculations. - Strategy: Perform targeted audits of high-mortality DRGs such as sepsis, respiratory failure, stroke, and cardiac conditions. Validate that principal diagnoses reflect the primary reason for admission and that all clinically supported comorbidities are captured. [![CTA overlay](https://no-cache.hubspot.com/cta/default/20824215/interactive-207465762308.png) ](https://hiacode.com/hs/cta/wi/redirect?encryptedPayload=AVxigLJrsjARHIqYU%2Fj3nqFmrcQ4n%2BDb9O9voQYXNi01UsaJSZNJ8l0spNWqTInNJNAY%2BZSFrj6QHnv0DG23nn9HqFd%2BI7goTRgIKow0zNJLLTpBIPFeBAI1uJdb7n8D2bMtUVNhErF4Y9oEXNek0hOmXc5JgfRQXJJH%2BSHCVI2idImkPhA5icOxvWqdZM411ED6Qx6%2BSk5GefIM%2BDe7Le%2FDEZcWExwcNcgDrICW&webInteractiveContentId=207465762308&portalId=20824215) ### 3. Reduce PSI Risk Through Accurate POA and Complication Coding Hospital Compare includes patient safety measures that are sensitive to present-on-admission indicators and complication coding. Inaccurate POA assignment or misclassified complications can negatively impact safety scores. - Strategy: Reinforce education around POA assignment and complication definitions. Ensure coders differentiate between conditions present at admission, expected outcomes of care, and true hospital-acquired complications. ### 4. Align Coding and CDI to Support Quality Measures Coding accuracy is dependent on documentation clarity. Gaps or ambiguity in provider documentation can limit a coder’s ability to accurately reflect severity and clinical complexity. - Strategy: Encourage collaboration between coding and CDI teams on Hospital Compare–sensitive cases. Joint reviews promote consistent interpretation of clinical indicators, support appropriate queries, and improve documentation quality over time. ### 5. Monitor Trends Before Data Becomes Public Hospital Compare data is publicly reported and updated on a set schedule. Waiting until scores are published limits opportunities for proactive correction. - Strategy: Use internal dashboards, audit findings, and trend analysis to monitor mortality, PSI-related DRGs, and utilization patterns throughout the year. Early identification of coding-driven issues allows for education and adjustment before public reporting cycles. ## Final Thoughts CMS Hospital Compare is highly visible and influential—but it is only as accurate as the data behind it. While coding does not control every measure, coding and documentation integrity are essential to ensuring fair and accurate performance representation. Proactive reviews, targeted education, and collaboration across teams help protect quality scores and reinforce data credibility. Need support reviewing coding practices tied to Hospital Compare measures? Health Information Associates offers [targeted reviews](https://hiacode.com/acute-review) and [coding support services](https://hiacode.com/acute-coding-support) designed to help organizations validate their data and approach public reporting with confidence. [![CTA overlay](https://no-cache.hubspot.com/cta/default/20824215/interactive-207465762308.png) ](https://hiacode.com/hs/cta/wi/redirect?encryptedPayload=AVxigLJrsjARHIqYU%2Fj3nqFmrcQ4n%2BDb9O9voQYXNi01UsaJSZNJ8l0spNWqTInNJNAY%2BZSFrj6QHnv0DG23nn9HqFd%2BI7goTRgIKow0zNJLLTpBIPFeBAI1uJdb7n8D2bMtUVNhErF4Y9oEXNek0hOmXc5JgfRQXJJH%2BSHCVI2idImkPhA5icOxvWqdZM411ED6Qx6%2BSk5GefIM%2BDe7Le%2FDEZcWExwcNcgDrICW&webInteractiveContentId=207465762308&portalId=20824215) ## FAQ #### Which CMS Hospital Compare measures are most affected by coding accuracy? Coding accuracy most directly impacts outcomes-based measures that rely on claims data, including mortality measures and patient safety indicators. Process measures and patient experience scores are generally not influenced by coding. #### How can inaccurate coding affect Hospital Compare mortality scores? Missed comorbidities, incorrect principal diagnosis selection, or underreported severity can skew risk adjustment, causing expected mortality to appear lower than it should. This can make outcomes appear worse than the actual care provided. #### Why are POA indicators important for Hospital Compare patient safety measures? Present-on-admission indicators help distinguish pre-existing conditions from hospital-acquired complications. Incorrect POA assignment can increase PSI rates and negatively affect publicly reported safety scores. #### How can coding and CDI teams work together to support Hospital Compare accuracy? Collaboration between coding and CDI teams helps ensure documentation clearly supports severity, acuity, and clinical complexity. Joint reviews and aligned query practices improve consistency and reduce quality-driven reporting risk over time. --- Since 1992, HIA has been the leading provider of [compliance audits](https://hiacode.com/acute-review), [coding support services](https://hiacode.com/acute-coding-support) and [clinical documentation audit services ](https://hiacode.com/clinical-documentation-integrity)for hospitals, [ambulatory surgery centers](https://hiacode.com/asc-coding), physician groups and other healthcare entities. HIA offers [PRN support ](https://hiacode.com/prn-contract-coding-support)as well as [total outsource support.](https://hiacode.com/total-outsource-coding) --- > ***The information contained in this coding advice is valid at the time of posting. Viewers are encouraged to research subsequent official guidance in the areas associated with the topic as they can change rapidly.***  ##### [Previous](https://hiacode.com/blog/coding-accuracy-premier-quality-utilization-benchmarks) ### [How Coding Accuracy Impacts Premier Quality and Utilization Benchmarks](https://hiacode.com/blog/coding-accuracy-premier-quality-utilization-benchmarks) ##### [Next](https://hiacode.com/blog/medpar-data-coding-accuracy-hospital-performance) ### [What MedPAR Data Can Reveal About Coding Accuracy and Hospital Performance](https://hiacode.com/blog/medpar-data-coding-accuracy-hospital-performance) Serach Blog Post ## Need to Earn CEUs? Our coding education platform, HIAlearn.com, offers courses related to this topic and many more. Subscribe today and access more than 230 courses accepted by AHIMA for CEUs, with a selection also accepted by AAPC. ![CTA Sidebar HIAlearn logo-1](https://hiacode.com/hs-fs/hubfs/CTA%20Sidebar%20HIAlearn%20logo-1.png?width=1080&height=189&name=CTA%20Sidebar%20HIAlearn%20logo-1.png) [![Learn More](https://no-cache.hubspot.com/cta/default/20824215/f611164b-1c02-4b86-a2aa-6033633d4569.png)](https://cta-redirect.hubspot.com/cta/redirect/20824215/f611164b-1c02-4b86-a2aa-6033633d4569) #### Category - [Medical Coding Tips (370)](https://hiacode.com/blog/tag/medical-coding-tips) - [Industry News (339)](https://hiacode.com/blog/tag/industry-news) - [Company News (23)](https://hiacode.com/blog/tag/company-news) - [Query Tips (23)](https://hiacode.com/blog/tag/query-tips) - [Annual Code Updates (16)](https://hiacode.com/blog/tag/annual-code-updates) - [CDI Tips (9)](https://hiacode.com/blog/tag/cdi-tips) ### Subscribe to our Newsletter #### Recent Blogs Jul 01, 2026 [Industry News](https://hiacode.com/blog/tag/industry-news) [Medical Coding Tips](https://hiacode.com/blog/tag/medical-coding-tips) ### [ICD-10-CM Coding for Colonosco...](https://hiacode.com/blog/icd-10-cm-coding-for-colonoscopy-following-positive-cologuard-result) Jun 24, 2026 [Industry News](https://hiacode.com/blog/tag/industry-news) [Medical Coding Tips](https://hiacode.com/blog/tag/medical-coding-tips) ### [20,000 Inpatient Reviews Revea...](https://hiacode.com/blog/20k-inpatient-coding-reviews-principal-diagnosis-pcs-revenue-integrity) Jun 10, 2026 [Industry News](https://hiacode.com/blog/tag/industry-news) [Medical Coding Tips](https://hiacode.com/blog/tag/medical-coding-tips) ### [Big Changes Coming to CPT Codi...](https://hiacode.com/blog/big-changes-coming-to-cpt-coding-for-maternity-care) Jun 05, 2026 [Industry News](https://hiacode.com/blog/tag/industry-news) [Medical Coding Tips](https://hiacode.com/blog/tag/medical-coding-tips) ### [Why Being Proactive Matters in...](https://hiacode.com/blog/proactive-coding-quality-assurance) ## Related blogs from Industry News , Medical Coding Tips Jul 01, 2026 [Industry News](https://hiacode.com/blog/tag/industry-news),  [Medical Coding Tips](https://hiacode.com/blog/tag/medical-coding-tips) #### [ICD-10-CM Coding for Colonoscopy Following Positiv...](https://hiacode.com/blog/icd-10-cm-coding-for-colonoscopy-following-positive-cologuard-result) A colonoscopy prompted by a positive Cologuar... 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[ Read More](https://hiacode.com/blog/proactive-coding-quality-assurance) ## Subscribe to our Newsletter Weekly medical coding tips and coding education delivered directly to your inbox. ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Brett Randolph, RHIT, CDIP, CCS", "url" : "https://hiacode.com/blog/author/brett-randolph" }, "dateModified" : "2026-02-12T19:01:38.067Z", "datePublished" : "2026-02-09T18:49:40.000Z", "headline" : "How Coding Accuracy Impacts CMS Hospital Compare Scores", "image" : [ "https://hiacode.com/hubfs/iStock-2218477072.jpg" ], "mainEntityOfPage" : { "@id" : "https://hiacode.com/blog/coding-accuracy-cms-hospital-compare-measures", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://hiacode.com/hubfs/HIA_RGB_AlternativeLogo%20(1)%20(1).png" }, "name" : "Health Information Associates" } } ``` ```json { "@context" : "https://schema.org", "@id" : "https://hiacode.com/blog/coding-accuracy-cms-hospital-compare-measures#blogposting", "@type" : "BlogPosting", "articleSection" : [ "Medical Coding", "Quality Reporting", "Hospital Performance", "CMS Measures" ], "author" : { "@type" : "Person", "name" : "Brett Randolph, RHIT, CDIP, CCS" }, "description" : "This article explains how medical coding and documentation accuracy influence CMS Hospital Compare mortality and patient safety measures, and outlines strategies healthcare organizations can use to support accurate public quality reporting.", "headline" : "How Coding Accuracy Influences CMS Hospital Compare Measures", "image" : "https://hiacode.com/hubfs/iStock-2218477072.jpg", "inLanguage" : "en-US", "keywords" : [ "CMS Hospital Compare", "coding accuracy", "medical coding quality", "hospital quality measures", "mortality risk adjustment", "patient safety indicators", "POA indicators", "clinical documentation integrity", "claims-based quality reporting" ], "mainEntityOfPage" : { "@id" : "https://hiacode.com/blog/coding-accuracy-cms-hospital-compare-measures", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "name" : "Health Information Associates", "url" : "https://hiacode.com" }, "url" : "https://hiacode.com/blog/coding-accuracy-cms-hospital-compare-measures" } ``` ```json { "@context" : "https://schema.org", "@id" : "https://hiacode.com/blog/coding-accuracy-cms-hospital-compare-measures#faq", "@type" : "FAQPage", "mainEntity" : [ { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "Coding accuracy most directly impacts outcomes-based measures that rely on claims data, including mortality measures and patient safety indicators. 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