Basics of Diagnostic Coding

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Presentation transcript:

Basics of Diagnostic Coding Chapter 18 Chapter 18 provides an overview of diagnostic coding in the medical office. Accurate coding procedures influence the reimbursement made to physicians by third-party payors, so the process must be approached carefully and codes assigned accurately.

Consider the following while reading this chapter: How do the format, layout, and conventions of the ICD-9-CM manual help the medical assistant search for the most accurate and specific diagnostic code? Why is medical record documentation so critical in relationship to diagnostic coding? Why does the medical assistant need to know the steps for performing diagnostic coding? What are the benefits of using diagnostic codes found in the ICD-9-CM? Provide this overview for the chapter content. Assign the study guide that corresponds with this chapter if not assigned in advance, as well as any additional assignments that are associated with this chapter.

What Is Diagnostic Coding? Diagnostic coding is described as the translation or transformation of written descriptions of diseases, illnesses, and injuries into numeric codes. The medical assistant facilitates accurate medical record keeping, and the efficient processing of claims for disease or injury for which a patient was treated. Codes are used in the claims submission process to request reimbursement from payors, to track the diagnoses treated by the physician, and to provide statistical data for research and other purposes. Diagnostic coding is the translation or transformation of written descriptions of diseases, illnesses, or injuries into numeric codes. Accurate use of the ICD-9-CM manual is essential for accurate translation of the medical record’s diagnostic statement (or statements) into numeric codes. Use of the ICD-9-CM facilitates accurate medical record keeping and efficient claims processing. Discuss the reasons that even a small error in diagnostic coding can drastically change the physician’s reimbursement.

Why Use ICD Codes? Standardizing a system of diagnostic coding accepted and understood by all parties in the reimbursement cycle Creating a more convenient method of data storage and retrieval Assisting in the maximization of reimbursement Shortening the claims-processing time Facilitating and measuring regulatory compliance by use of guidelines and other instructions Assisting in measuring the appropriateness and timeliness of medical care Discuss the ways that ICD Codes have allowed users to save time in the claims process. Talk about why a maximum reimbursement is important to the physician.

The ICD-9-CM Code The ICD-9-CM code is located in Volume 1, the Tabular Index, of the ICD-9-CM coding manual. The code consists of a three-digit category code that represents a specific disease, illness, condition, or injury, within a general disease category. Up to two additional digits can be used, which add further definition and specificity. These two additional digits are the fourth digit, or subcategory; and the fifth digit, or subclassification, respectively. What does ICD-9-CM actually mean? Understand the format of what the ICD-9-CM code looks like.

Structure of the ICD-9-CM Volumes 1 and 2 are used for diagnostic coding by hospitals, physicians, and all other providers of service. Volume 1, also known as the Tabular Index, contains all of the diagnostic codes grouped into 17 chapters of disease and injury. Volume 2 is called the Alphabetic Index and is used in the same way an alphabetic index in any textbook is used except that it refers the user back to the category codes in the Tabular Index, rather than page numbers. Volume 3 is used by hospitals to code procedures and services performed within the hospital environment. Volume 3 is not used by most physician-providers. Discuss how the medical assistant knows which volume to use. Talk about the contents of each volume.

Volume 1—Tabular Index Volume 1 of the ICD-9-CM consists of 17 chapters that classify diseases and injuries: Each chapter can contain the following four subdivisions, each of which provide more detail about the illness, condition, disease, or injury: Section, also called a Chapter Category, also called a Classification Subcategory Subclassification Two sections containing supplementary classification codes V and E; Five appendices Discuss the definitions of each subdivision. Talk about the difference between V codes and E codes.

Volume 1—Tabular Index (cont’d) Section or Chapter: A group of three-digit code numbers describing a general category. Category: A three-digit code representing a specific disease, illness, condition, or injury within a Section or Chapter Subcategory: Adds additional information or description to the Category code. The subcategory is generally used to assign a fourth digit. Fourth digits are used to describe whether any disease process or manifestation exists. Subclassification: Adds the highest level of detail to the illness or injury. The subclassification is used to assign a fifth digit, when appropriate. Fifth digits are used to describe the type of disease. Be able to distinguish between a section, category, subcategory, and subclassification. Determine the order of specificity – which is most specific?

Volume 1—Tabular Index, Supplemental Classifications The two supplementary Chapters included in the Tabular Index are V codes, which describe factors influencing health status and which describe contact with health services that cannot be classified elsewhere, and E codes, which describe external causes of injury and poisoning. The V code is used on occasions when the patient is not currently ill or to explain problems that influence a patient’s current illness, condition, or injury. The E code is used to classify environmental or external causes of injury, poisoning, or other adverse effects on the body. Talk about five examples of V codes and five examples of E codes. Discuss the difference between the two types of codes.

Volume 1—Tabular Index, Appendixes Appendix A—Morphology of Neoplasms. Morphology code numbers consist of the letter M, followed by five digits. Appendix B—Glossary of Mental Disorders. This glossary is an alphabetic listing of the psychiatric terminology that appears in Chapter 5 of Volume 1. Appendix C—Classification of Drugs. The adverse effects of drugs are coded according to the American Hospital Formulary Service (AHFS) list. Appendix D—Classification of Industrial Accidents. This appendix concerns the Statistics of Employment Injuries categorized by the type of industry where the accident occurred. Appendix E—List of Three-Digit Categories. All of the three-digit category codes from the Tabular Index are listed in order, by chapter. Discuss the meaning of morphology. What is a neoplasm? What type of third-party reimbursement uses Appendix D most frequently?

Conventions Used in Volume 1: the Tabular Index Conventions refer to abbreviations, punctuation, symbols, instructional notations, and related entities that provide guidance to the medical assistant or coder in selection of an accurate and specific code. ABBREVIATIONS. There are two primary abbreviations used in the Tabular Index of the ICD-9-CM, NEC and NOS PUNCTUATION.  Four basic forms of punctuation are used in the Tabular Index: brackets, parentheses, colon, and braces SYMBOLS.  Symbols are used to designate the requirement of a fourth and/or fifth digit, new entries, and revised text or codes. OTHER CONVENTIONS. Two other conventions used in both the Alphabetic Index and the Tabular Index are the use of bold and italic fonts. INSTRUCTIONAL NOTATIONS.   Instructional notations are notes included in the Tabular Index to provide additional guidance when selecting a specific diagnosis code. Discuss the differences between the different types of conventions used in ICD-9-CM coding. Provide examples of the conventions being used in an actual coding situation.

Volume 2—Alphabetic Index The Alphabetic Index, Volume 2, consists of: an alphabetic list of diagnostic terms and related codes three supplementary sections Hypertension Table Neoplasm Table Table of Drugs and Chemicals a separate Alphabetic Index for E Codes Discuss when the Alphabetic Index is used. What issues might arise is the Alphabetic Index is used in the improper order?

Supplementary Sections of the Alphabetic Index Hypertension Table—The Hypertension Table lists the types of hypertension and the manifestations and causes of hypertension and is further subdivided into three categories. Main terms Modifying terms Subterms Neoplasm Table—The Neoplasm Table lists neoplasms by anatomic location and is further categorized into four categories. Malignant Neoplasm Benign Neoplasm Unspecified Behavior Uncertain Behavior Table of Drugs and Chemicals—This table contains a classification of drugs and other chemical substances to identify poisoning states and external causes of adverse effects. Index to External Causes of Injuries and Poisoning (E Codes)—E codes classify environmental events, circumstances, and other conditions as the cause of injury and other adverse effects. Why are the Supplementary Sections included in the Alphabetic Index? Discuss the reasons that neoplasms are categorized in such specific detail.

Volume 3—Procedures: Tabular Index and Alphabetic Index Volume 3 contains a Tabular Index and Alphabetic Index of procedures Primarily used in hospitals and other facilities to code the procedures performed in those settings Procedure codes are two digits, followed by a decimal and one or two additional digits The Tabular Index of Volume 3 includes 16 chapters containing codes and descriptions for surgical, diagnostic, and therapeutic procedures performed in a hospital setting The Alphabetic Index of Volume 3 is an alphabetic listing of the surgical, diagnostic, and therapeutic procedure codes used as a guide to finding a specific code or codes in Volume 3 of the ICD-9-CM Talk about the types of procedures found in Volume 3. What is the difference between these procedures and those found in the Procedural Coding text?

Beginning the Coding Process Medical Documentation Encounter Form Treatment or Progress Notes History and Physical Report (H&P) Discharge Summary Operative Report Radiology, Laboratory, or Pathology Report Extracting Diagnostic Statements Main and Modifying Terms Talk about the reason that reading is so important in the coding process. Discuss the importance of each of the listed documents and what role they play in the coding and reimbursement process.

Beginning the Coding Process Medical Documentation Information pertinent to code selection is culled from a variety of medical documents Sources of diagnostic statements include the encounter form, treatment notes, discharge summary, operative report, and radiology, pathology, and laboratory reports Talk about how coding differs from making a medical diagnosis.

Beginning the Coding Process Encounter Form Encounter form typically contains the practice name, address, phone number, and tax and insurance identification numbers the patient’s demographic and insurance information a list of common procedures and services, and their codes, performed by the provider of care a list of common diagnoses, or blank lines where the physician can write in the patient diagnosis or diagnoses from the encounter Evaluate several encounter forms and find the elements listed on each one. Determine which forms seem more streamlined and easier to use, as well as which are confusing and more difficult to use.

Beginning the Coding Process Treatment or Progress Notes Treatment notes are the second most common medical document from which diagnostic information can be obtained Treatment notes or SOAP notes are a system of charting which include the subjective findings, objective findings, assessment, and plan for treatment Discuss progress notes written in the SOAP process. What type of information is found under the subjective headings? Objective headings? Assessment headings? Plan or Treatment headings?

Beginning the Coding Process History and Physical Report History and Physical Report (H&P, HPE) is the starting point of the patient's "story" as to why he/she sought medical attention or is now receiving medical attention The H&P begins with a statement in the patient’s own words that describes why he/she is seeking medical attention The H&P (Figure 18-6) begins with a statement in the patient’s own words that describes why he/she is seeking medical attention Following the chief complaint, the physician will also document any other pertinent History about the patient's medical, behavioral, and social aspects, such as smoking, drinking, drug use, family history, previous surgeries and hospitalizations, etc. Following the History, the physician then performs a Physical Exam (PE). The Physical Exam includes both objective and subjective assessments of the patient's physical being The final sections of a History and Physical Exam include an Assessment and Plan. Assessment is the physician’s assessment of findings from the H&P. Plan is the plan for treatment of the Assessment, and can include x-rays, lab work, surgery, or administration of medications, etc. Discuss the reasons that the patient’s history affects the coding process and specifically, the code assigned for a specific office visit. Talk about why the order that the codes are assigned is important.

Beginning the Coding Process Discharge Summary Discharge Summary is used primarily for extracting procedure and diagnostic information for patients who were hospitalized, rather than seen in the physician’s office main elements of a Discharge Summary are: patient demographic information admission date date of discharge history and examination findings clinical course condition on discharge discharge diagnosis aftercare plan Why is the Discharge Summary an important document for diagnosis coding? Does this summary always match the admissions summary? Why or why not?

Beginning the Coding Process Operative Report Operative Report will also be used for extracting procedure and diagnostic information for patients who underwent surgery as outpatients or inpatients An Operative Report includes preliminary diagnosis and procedure the final diagnosis and procedure detailed description of the operative procedure from start to finish Evaluate two or three operative reports. How are they alike and how do they differ? What information is common to all operative reports?

Beginning the Coding Process Radiology, Laboratory, and Pathology Radiology, laboratory, and pathology reports are not used to obtain diagnostic statements findings from these reports must be documented in the treatment notes in the medical record, in order to be used for diagnostic coding, charge entry, or insurance billing purposes Why are radiology, laboratory, and pathology codes important both for diagnosis and procedure purposes?

Beginning the Coding Process Extracting Diagnostic Statements The basic steps in diagnostic coding are to: analyze and abstract the diagnosis or assessment documented in the medical record and, using the conventions, guidelines, Alphabetic and Tabular Index of the ICD-9-CM coding manual, select the most accurate and applicable diagnostic code. These abstracted diagnosis statements are then broken down into main term(s) and any modifying term(s) or subterm(s). Talk about the reason that the medical assistant must obtain and use the most accurate codes possible when billing insurance. If the most accurate code is not used, what are some of the consequences?

Beginning the Coding Process Main and Modifying Terms The Alphabetic Index is organized by main, modifying, and subterm terms Main terms are the condition, disease, illness, or injury Modifying terms as described earlier, are terms that modify or act as adjectives to main terms. Modifying terms are indented two spaces below the main term. Subterms are indented two spaces below the modifying term, and add more detail or information to the modifying term Discuss several examples of main and modifying terms. Talk about how to determine whether a term is the main term or the modifying term.

Diagnostic Coding Decision Tree A series of questions called a decision tree can assist the medical assistant in navigating the Alphabetic and Tabular Index while the steps for diagnostic coding are performed Distribute the Decision Tree and discuss the options in using it for diagnostic coding. Use actual medical conditions and follow the Decision Tree to determine the most accurate and correct code to use. Discuss choices in class.