Study guide
13.1 Roles and Responsibilities of the CDI Specialist
Certified Clinical Documentation Specialist CCDS
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1 Introduction & Exam Overview
1.1 Current Exam Facts 1.2 Eligibility Pathways and the 2,000-Hour Year 1.3 Allowed Resources and Test-Day Rules 1.4 Recertification, Fees, and How This Guide Maps the Eight Domains
2 IPPS Foundations
2.1 How IPPS Works and How CMS Updates It 2.2 MS-DRG Assignment, Relative Weights, and Grouping 2.3 Provider and Clinical Staff Documentation Duties under IPPS
3 Severity, CMI, Medical Necessity, and Oversight
3.1 CC versus MCC Recognition and CC Exclusion Lists 3.2 Case Mix Index and Why CDI Tracks It 3.3 Two-Midnight Rule, Medical Necessity of Setting, and Principal Diagnosis 3.4 MAC, RAC, CERT, OIG, and Denial-Vulnerable Practices
4 Nervous and Respiratory System CDI
4.1 Nervous System Conditions for CDI 4.2 Acute and Chronic Respiratory Failure, ABGs, and Ventilation Support 4.3 Pneumonia, COPD, PE, Pleural Effusion, and Respiratory Infections
5 Circulatory, Digestive, Hepatobiliary, Musculoskeletal, and Skin CDI
5.1 Circulatory Disorders 5.2 Digestive and Hepatobiliary Disorders 5.3 Musculoskeletal and Skin
6 Endocrine, Nutrition, Kidney, and Hematologic CDI
6.1 Diabetes, Dehydration, and Obesity 6.2 Malnutrition Criteria, Severity, and Audit Risk 6.3 AKI, CKD Staging, UTI, and Urinary Stones 6.4 Anemia, Coagulation, Sickle Cell, Lymphoma, and Leukemia
7 Infectious Disease, Other MDCs, and Clinical Indicator Tools
7.1 Sepsis, Severe Sepsis, Postoperative and Other Infections 7.2 Mental, Substance Use, Injuries/Toxicology, and HIV-Related Conditions 7.3 Medications, Diagnostic Tests, and Abbreviations as Clinical Indicators
8 Health Record Elements and Query Triggers
8.1 Which Record Elements Support Diagnosis and Procedure Codes 8.2 Attending versus Radiologist, Pathologist, and Other Providers 8.3 When a Physician Query Is Warranted 8.4 When Queries Are Not Appropriate
9 Query Timing, Verbal Queries, Formats, and Clinical Indicators
9.1 Concurrent, Retrospective, Pre-Bill, and Prospective Timing 9.2 Verbal Queries and Required Documentation 9.3 Open-Ended, Multiple-Choice, and Yes/No 9.4 Clinical Indicators and How to Source Them
10 Compliant Query Practice and Clinical Validation
10.1 Compliant versus Leading and Other Noncompliant Queries 10.2 ACDIS/AHIMA 2026 Guidelines for Achieving a Compliant Query Practice 10.3 Clinical Validation and Diagnoses without Clinical Support
11 CDI Program Metrics
11.1 Productivity, Query Volume, and Provider Response Rates 11.2 CMI, CC/MCC Capture, and High-Frequency DRGs 11.3 SOI/ROM as CDI Program Performance Metrics
12 Physician Metrics, PEPPER, Forecasting, and Public Data
12.1 Measuring Physician Documentation Performance 12.2 PEPPER, Forecasting, Hospital Financial Data, and Public Reporting
13 CDI Roles, Coder Collaboration, and Physician Education
13.1 Roles and Responsibilities of the CDI Specialist 13.2 Coder Roles Working with a CDI Department 13.3 Physician Education Tools, Forms, and Presentations
14 Provider Communication and DRG Reconciliation
14.1 Non-Confrontational Communication and When Verbal Beats Written 14.2 Working DRG versus Final DRG Reconciliation
15 Official Guidelines, Principal Diagnosis, and Secondary Diagnosis
15.1 Official Guidelines, Cooperating Parties, Updates, and AHA Coding Clinic 15.2 Principal Diagnosis Selection 15.3 Secondary Diagnosis Reporting Criteria
16 Sequencing, Coding Conventions, and POA Indicators
16.1 Sequencing When Two Diagnoses Equally Meet PD; Working DRG with Multiple Diagnoses 16.2 Integral Signs/Symptoms, the With Convention, and Uncertain Diagnoses 16.3 Present-on-Admission Indicator Assignment and Payment Impact
17 Hospital-Acquired Conditions, Disposition, and ICD-10-PCS Essentials
17.1 CMS Hospital-Acquired Condition Payment Provision 17.2 Discharge Disposition, Transfer Payment, Principal Procedure, and ICD-10-PCS Essentials
18 Ethics, Privacy, and Leading Queries as Compliance Failures
18.1 ACDIS Code of Ethics and CDI Goals beyond Reimbursement 18.2 HIPAA, Minimum Necessary, and Record Confidentiality 18.3 Leading Queries as a Compliance Failure
19 DRG Creep, OIG Oversight, PEPPER, and the False Claims Act
19.1 DRG Compliance, DRG Creep, and the OIG Work Plan 19.2 PEPPER Compliance Risks and the False Claims Act
20 Mortality Index, Observed-to-Expected Ratios, and Quality Data Sources
20.1 Documentation Impact on Mortality Index (SOI/ROM) 20.2 Mortality Reviews and Observed-to-Expected Ratios 20.3 Abstracted versus Claims-Based Quality Data
21 CMS Quality Programs, PSIs, and Infection versus Complication Codes
21.1 HVBP, HAC Reduction Program, HRRP, 30-Day Mortality, and Hospital IQR 21.2 PSI 90 Components and PSIs beyond the Composite 21.3 Healthcare-Associated Infections versus Complication Codes
13.1 Roles and Responsibilities of the CDI Specialist
Key Takeaways Explain This Topic AI
Concurrent inpatient CDI review is daily work on records of patients still in the hospital; retrospective review is daily work on post-discharge, typically pre-bill records.
The specialist uses clinical knowledge—notes, labs, imaging, and treatment—to judge how the record will translate into coded data, then queries or talks with the care team when documentation is missing, unclear, or conflicting.
A working DRG is the specialist’s running MS-DRG estimate from current documentation; it is not the final coded DRG and does not let CDI add a diagnosis the provider never wrote.
Provider education is a core daily function, not an optional extra: a query fixes one encounter, teaching reduces the next cluster of the same gap.
The CDI specialist never independently adds a diagnosis to the health record and never edits another clinician’s signed note.
Last updated: September 2026
13.1 Roles and Responsibilities of the CDI Specialist
Quick Answer: An inpatient CDI specialist reviews records concurrently while the patient is still hospitalized or retrospectively after discharge (typically before the bill), uses clinical knowledge to judge how the record will translate into coded data, queries for missing or conflicting documentation, maintains a working DRG, and educates providers. The specialist never independently adds a diagnosis to the health record or edits another clinician’s note.
The clinical documentation integrity (CDI) specialist sits between the bedside story and the coded claim. On an inpatient stay paid under the Inpatient Prospective Payment System (IPPS) , that position is a defined communication role: review the record, recognize what the documentation can and cannot support, close gaps through conversation or query, and teach so the next record is clearer. It is not a license to rewrite the chart, and it is not a silent second coding shift during the stay.
This independent ExamFinch chapter teaches the job description Domain V tests: what the specialist does every day, what a working diagnosis-related group (working DRG) is for, and which actions are out of bounds. Later Domain V sections cover non-confrontational style and working-versus-final DRG reconciliation. Domain III covers query formats. Keep those lanes separate while you study the role itself.
Concurrent Review and Retrospective Review
Concurrent review happens while the patient is still an inpatient. ACDIS describes the concurrent specialist as performing daily reviews of records for patients who are currently hospitalized. In a working program that usually means a first review shortly after admission—or after a case-selection screen flags the account—and follow-up reviews as new notes, results, and treatments appear. Concurrent work is the setting where a working DRG is most useful: the specialist estimates the Medicare Severity Diagnosis-Related Group (MS-DRG) that today’s documentation would support and updates that estimate when a query is answered or a new condition is documented.
Retrospective review happens after discharge, typically in the pre-bill window—after the stay ends and before the claim is released. The retrospective specialist still uses clinical knowledge, still queries, and still educates. Timing and leverage change. The care team is no longer rounding on that patient; memory fades; some results (pathology, send-out cultures, finalized operative reports) may only now be complete. The advantage is a fuller record. The risk is a late query that delays billing or a missed conversation that would have been easier at the bedside.
Many hospitals run a hybrid model: concurrent coverage on high-priority units or payers, with a retrospective sweep of accounts concurrent staff never reached. The role does not change with the calendar. Both concurrent and retrospective specialists collaborate with physicians and the rest of the care team; evaluate how provider notes, nursing and allied documentation, laboratory results, imaging, and treatment plans will translate into coded data; communicate—verbally or by query—when documentation is missing, unclear, or conflicting; and educate providers so severity of illness, complexity, and acuity are described in language coding can report.
What does change is the usual channel. Concurrent work favors a short unit conversation plus a documented query when the issue must live in the permanent record. Retrospective work is more often a written query in the electronic health record or query software, with physician-advisor escalation if the case is clinically contested. Choosing verbal versus written communication is its own Domain V skill; here the point is that both timings are legitimate inpatient CDI practice, and ACDIS eligibility counts concurrent or retrospective inpatient work.
From Clinical Knowledge to Coded Data
The specialist is not assigning the official codes that will appear on the institutional claim. That is the coder’s post-discharge job. The CDI task is a clinical-to-coded question: if a coder applied the Official Guidelines for Coding and Reporting and Uniform Hospital Discharge Data Set (UHDDS) definitions to this record tomorrow, what would be reportable—and what is only implied?
That question requires bedside literacy. A rising creatinine and a fluid bolus are not a diagnosis of acute kidney injury (AKI) . Crackles, an elevated B-type natriuretic peptide (BNP) , and intravenous diuretics are not a coded type of heart failure until a provider states the type and acuity. A positive blood culture is not sepsis, severe sepsis, or bacteremia until the provider links infection and organ dysfunction or states an alternative. The specialist reads the treatment and the indicators to see whether the words match.
The same skill supports clinical validation . If the record says severe malnutrition but there is no recognized nutritional assessment, no supporting intake or anthropometric story, and no treatment beyond a standard diet, the issue is not add the major complication or comorbidity (MCC) . The issue is whether the documented diagnosis is clinically supported. A compliant query can ask the provider to confirm, revise, or offer an alternative. Silently leaving an unsupported MCC in the working DRG trains the program to fail an auditor and teaches physicians that CDI is a payment shop.
CDI specialists are not members of the treatment team. They do not render a bedside diagnosis. They collect indicators from the record and ask the people who are accountable for the diagnosis to make the clinical statement complete and consistent.
Queries, Education, and the Working DRG
A query is the formal tool when the record is incomplete, conflicting, or clinically inconsistent. The 2026 ACDIS/AHIMA Guidelines for Achieving a Compliant Query Practice require a nonleading question, sourced clinical indicators, and no reimbursement or quality-outcome language. Multiple-choice queries need clinically relevant options plus an open-ended path such as Other, please specify. Yes/no queries may not introduce a new diagnosis. Those format rules belong to Domain III. The role rule is simpler: the CDI specialist requests clarification. The provider decides what is true for the patient and documents it in the permanent record before coding relies on it.
Provider education is the other half of the same job. A query fixes one encounter. A five-minute service huddle on acute-on-chronic systolic heart failure versus unspecified heart failure can prevent the next month of repeat queries on that service. ACDIS lists education among the daily functions of both concurrent and retrospective specialists. If your only output is a query rate, you are doing half the role Domain V tests.
The working DRG is the specialist’s running estimate of the MS-DRG the current documentation would group to. It is a communication and analysis tool—used for case-mix conversations, expected-length-of-stay context, and later comparison with the final DRG coding assigns after discharge. It is not a second official grouper result, and it does not authorize the specialist to drop a diagnosis into the coder’s queue that no provider wrote. A working DRG that assumes an undocumented MCC is a planning fiction, not CDI.
Hard Boundaries: What the Specialist Must Never Do
Three prohibitions show up on exams and in compliance reviews.
Do not independently add a diagnosis to the health record. The specialist may not enter acute respiratory failure as if it were a provider diagnosis, even when the arterial blood gas is classic and the patient is on a high-flow device.
Do not edit another clinician’s note. Fixing a typo in an attending progress note, inserting a missing MCC, or cleaning up a copy-forwarded problem list is record alteration, not CDI.
Do not lead. Suggesting the one diagnosis that raises reimbursement, offering only the MCC option, or putting quality-score language in the query violates compliant query practice.
The specialist may collect indicators from any part of the record, talk with the team, issue a compliant query, update the working DRG, and teach. Those actions leave the diagnostic decision with the provider and the final code assignment with coding.
Worked Encounter: Implied Heart Failure
A 78-year-old is admitted from the emergency department with dyspnea. The history and physical says CHF. The echocardiogram shows a left-ventricular ejection fraction of 30 percent. Intravenous furosemide is infusing. BNP is 1,400 pg/mL. The concurrent specialist’s job is not to type acute-on-chronic systolic heart failure into the history and physical. The job is to recognize that coded data cannot report a specific heart-failure type from CHF plus an echo, to place a nonleading query that cites those indicators, to update the working DRG only after the provider documents the type and acuity, and to note if this service repeats unspecified heart failure—because that pattern is an education topic, not a reason to start editing notes.
A Day-in-Role Picture
A typical concurrent specialist opens a worklist (all Medicare inpatients, a high-risk service, or a software-priority score), reads the history and physical, the latest progress notes, relevant results, and the medication administration record, then asks whether the principal diagnosis —the condition, after study, that occasioned the admission—is stated specifically enough and whether secondary diagnoses that meet UHDDS reporting criteria (clinical evaluation, therapeutic treatment, diagnostic procedures, extended length of stay, or increased nursing care or monitoring) are actually named. If the gap is real, the specialist queries. If the gap is a pattern on that service, the specialist plans education. If the clinical story is disputed, the specialist may involve a physician advisor . If the stay has ended, a retrospective colleague does the same work against a closed record and a ticking bill-hold clock.
None of those steps includes writing a diagnosis the provider did not document or changing a note the provider already signed.
Function CDI specialist does CDI specialist does not
Review timing Concurrent daily review of in-house records and/or retrospective pre-bill review Treat post-payment audit cleanup as the only definition of CDI
Clinical translation Judge what notes, labs, imaging, and treatment can support in coded data Assign the official billed ICD-10-CM/PCS codes for the stay
- Communication Verbal discussion and compliant query Insert a diagnosis or edit a signed note
- Grouping Maintain and update a working DRG Treat the working DRG as the final coded DRG
Teaching Educate providers on specificity and disease-process description Coach providers to document a diagnosis because it raises payment