Coding Knowledge and Skills

CCS · 120 questions

• A county hospital coder reviews a completed inpatient chart for pneumonia with associated respiratory failure. The attending documents both conditions in the progress notes and discharge summary, while a nursing note alone mentions possible aspiration risk that no provider confirmed. Which approach is correct for diagnosis code assignment?
• An academic medical center outpatient surgery coder reads an operative report describing a completed laparoscopic cholecystectomy. The surgery schedule had been booked as an open cholecystectomy. Which source should drive procedure code assignment?
• A municipal ED coder abstracts an encounter in which the patient presented with chest pain that was evaluated and ruled out as cardiac; the ED physician’s final impression is gastroesophageal reflux disease (GERD). Which diagnosis assignment approach is correct?
• A children’s hospital within a health system treats a pediatric inpatient for gastroenteritis with dehydration. The attending clearly documents both conditions and both are evaluated and treated during the stay. What should the coder do regarding diagnosis reporting?
• A critical access hospital coder finds a pathology report confirming malignancy after a biopsy performed during the stay. The attending’s discharge documentation references the pathology results. How should the coder treat the pathology findings for diagnosis assignment?
• A VA-affiliated community hospital inpatient has insulin use documented throughout the stay, and the attending documents type 2 diabetes mellitus without complications. Which coding approach is correct?
• A city hospital day-surgery case documents excision of a skin lesion with measured excised diameter and anatomic site clearly stated in the operative note. The pre-operative diagnosis only said “skin lesion.” What should guide procedure coding?
• A regional trauma center codes multiple injuries from a motorcycle crash. EMS narrative lists several possible injuries, while the trauma attending’s documentation specifies confirmed injury sites and types after evaluation. Which statement is correct?
• A county behavioral health inpatient unit’s psychiatrist documents major depressive disorder, single episode, severe, without psychotic features. Which approach correctly reflects diagnosis coding expectations?
• A hospitalist documents acute on chronic systolic (congestive) heart failure during an inpatient stay. How should heart-failure coding reflect that documentation?
• An ambulatory hospital clinic procedure note documents a joint injection with corticosteroid and local anesthetic, including the joint injected. Which factor most correctly guides procedure or service coding?
• A municipal hospital obstetrics coder reviews a delivery encounter. The delivery record documents outcome and procedures performed; the prenatal problem list includes older issues not addressed at delivery. What should primarily drive obstetric diagnosis and procedure coding for this encounter?
• A county medical center admits a patient for acute cholecystitis; controlled hypertension is also documented and managed with home medications. After study, acute cholecystitis remains the condition that occasioned admission. Which diagnosis should be principal?
• An outpatient hospital clinic visit is scheduled and documented for management of newly diagnosed hypothyroidism. During the visit the patient also mentions seasonal allergies that are not evaluated or treated. What is the correct first-listed diagnosis approach?
• After study, two conditions equally meet the definition of principal diagnosis for an inpatient admission, and Official Guidelines permit either to be sequenced as principal. What is the correct sequencing conclusion?
• A patient is admitted for workup of syncope. After study, complete heart block is identified and treated with pacing during the stay. Which principal-diagnosis selection is most appropriate?
• An ED-to-inpatient admission begins with chest pain. After study, NSTEMI is confirmed and treated during the stay. Which principal diagnosis selection best follows inpatient guidelines?
• A same-day hospital surgery patient’s record needs a first-listed diagnosis reflecting why the procedure was performed. How should the coder think about diagnosis sequencing in this setting?
• An inpatient undergoes a significant procedure performed for definitive treatment of the principal diagnosis and also has an unrelated secondary procedure during the same stay. Which procedure is generally identified as the principal procedure?
• A municipal hospital codes a newborn’s birth admission. Which principal-diagnosis approach is appropriate?
• A patient is admitted for elective total knee replacement for documented osteoarthritis of the knee. What is the typical principal diagnosis for this admission?
• A patient is placed in hospital observation (outpatient) for evaluation of a documented condition under observation protocols. Which diagnosis sequencing framework applies?
• A trauma inpatient has multiple serious injuries. After study, a life-threatening intracranial injury is the condition that chiefly drove the admission and resource use. How should principal diagnosis be selected?
• A patient is admitted to a hospital rehab unit after acute stroke care was completed elsewhere. Which principal-diagnosis approach is appropriate for the rehab admission?
• A coder reviewing anemia in neoplastic disease sees a “Code first” note under the manifestation anemia code instructing that the neoplastic disease be coded first. What sequencing action is required?
• During inpatient coding at a county hospital, the Alphabetic Index and Tabular List show an Excludes1 note linking two condition codes the physician documented. What is the correct coding action?
• A facility coder reviews an ICD-10-CM Tabular Excludes2 note under a respiratory code for a condition the record also documents. How should the Excludes2 note be applied?
• An inpatient record documents type 2 diabetes mellitus with diabetic chronic kidney disease, and ICD-10-CM provides a combination code that fully captures both. What is the preferred coding approach?
• A hospital inpatient is treated for chronic obstructive pulmonary disease, and the record also documents current tobacco dependence. The Tabular List under the respiratory code includes a “use additional code” note for tobacco use. What should the coder do?
• At discharge from an acute inpatient stay, the attending documents “possible pneumonia” as a diagnosis still under consideration. How does the inpatient uncertain-diagnosis guideline differ from outpatient coding?
• Documentation supports the same condition in both eyes, and ICD-10-CM offers a bilateral code for that condition. What is the correct laterality approach?
• An injury code requires a seventh character, but the base code is shorter than six characters. How should the placeholder character be used?
• A patient returns to the hospital outpatient department for routine follow-up of a healing fracture during the healing/recovery phase. Which seventh-character concept applies for the injury code?
• An operative report describes removing an entire left kidney for disease. The surgeon’s narrative casually says “excised the kidney,” but the objective was complete removal of the body part. How should ICD-10-PCS root operation selection be approached?
• An inpatient record includes a measured BMI value in the nursing flowsheet and the attending documents obesity. What is the appropriate approach to BMI and obesity coding?
• A patient is admitted after a fall at home that caused a hip fracture. How should external cause codes be used for the inpatient stay?
• In a hospital outpatient department, a planned procedure is stopped after anesthesia is induced because the patient becomes unstable. Which reporting concept applies?
• A hospital outpatient department performs the same procedure on both paired organs during one session. CPT provides either a bilateral code or instructions for a bilateral modifier. What is the correct bilateral reporting approach?
• On the same day as a minor outpatient hospital procedure, the physician documents a significant, separately identifiable evaluation and management service above the usual pre-/post-work of the procedure. What modifier concept is relevant?
• Two outpatient procedures performed in the same session would ordinarily be bundled under NCCI edits, but the record documents that the services were distinct and clinically separate. What is the role of the distinct procedural services modifier concept?
• A hospital outpatient procedure is performed on the left side only, and the CPT/HCPCS code does not inherently describe laterality. Which modifier approach is appropriate?
• A physician elects to perform only part of a planned outpatient procedure because the full service is not needed after intraoperative findings. Documentation supports the partial completion. Which modifier concept applies?
• Operative documentation for a hospital outpatient/ASC case shows a qualified second surgeon actively assisting throughout a payable procedure. What coding concept should be considered?
• During the postoperative period of a prior surgery, the same physician returns the patient to the OR for a planned staged procedure related to the original surgery. Which modifier concept family is most appropriate to distinguish this from an unrelated return?
• An outpatient procedure must be repeated because of a failed prior attempt. Why does it matter whether the same physician or a different physician performs the repeat?
• An outpatient hospital procedure required substantially greater time and intensity than usual because of unusual patient anatomy, and the operative report details the additional work. Which modifier concept may apply?
• A hospital outpatient coder is finalizing a claim that already uses CPT modifiers where appropriate. When might HCPCS Level II modifiers also be needed?
• An NCCI edit bundles two outpatient codes. The coder considers appending a distinct-services modifier solely to force separate payment, but the record does not support distinct services. What is the correct action?
• An inpatient is admitted with sepsis due to a documented localized infection such as pneumonia. How should sequencing generally be approached under Official Guidelines for sepsis?
• An inpatient record documents hypertension and chronic kidney disease. How should ICD-10-CM hypertensive chronic kidney disease guidance influence coding and sequencing?
• A patient is admitted to a county hospital for delivery of a full-term infant. Obstetric chapter (chapter 15) codes apply to the encounter. Per Official Guidelines for obstetric sequencing, which diagnosis sequencing approach is typically required?
• A hospital inpatient with known malignancy is admitted specifically for treatment of anemia due to chemotherapy. Which sequencing principle should guide the principal diagnosis?
• An inpatient undergoes both a diagnostic procedure and a definitive therapeutic procedure during the same stay. For inpatient procedure reporting conventions, which procedure should be sequenced first?
• A patient is admitted from the emergency department with dehydration due to acute gastroenteritis. Both conditions are evaluated and treated during the inpatient stay. How should the coder determine principal diagnosis sequencing?
• A hospital outpatient encounter is solely for antineoplastic chemotherapy. Which statement best reflects first-listed Z-code use?
• A patient returns to the hospital orthopedic clinic for routine aftercare following a healed fracture treated previously. Which sequencing concept distinguishes this visit from an acute initial-injury encounter?
• A burn patient has documented burns of differing degrees on multiple sites. When sequencing burn diagnosis codes, which guideline applies?
• Secondary diabetes mellitus is documented as due to an underlying condition. Which sequencing approach is generally required?
• During a hospital outpatient endoscopy session, a planned diagnostic endoscopy progresses to a therapeutic endoscopic procedure in the same session. Which reporting concept should the coder apply?
• A patient is admitted specifically for treatment of a postoperative wound infection that is a complication of recent surgical care. Which principal diagnosis approach is typically appropriate?
• On the admission physical examination, a stage 3 pressure ulcer is clearly documented as already present. Which present-on-admission (POA) indicator is appropriate for that pressure ulcer diagnosis?
• A hospital-acquired urinary tract infection is first documented on hospital day 4, with no clinical indication it was present on admission. Which POA indicator should be assigned?
• Documentation does not clearly establish whether pneumonia was present on admission, and the provider has not stated that it is clinically impossible to determine. Which POA concept distinction should the coder recognize?
• A patient is admitted for acute community-acquired pneumonia. Longstanding type 2 diabetes mellitus is documented as an active chronic condition at admission but is not the reason for admission. Which POA assignment is correct for the diabetes?
• An obstetric inpatient diagnosis falls into a category with special CMS present-on-admission instructions. What should the coder do?
• During an inpatient operative episode after admission, an intraoperative hemorrhage occurs that was not present before surgery. Which POA indicator is typically appropriate for that surgical complication diagnosis?
• For acute inpatient claims subject to POA reporting, which statement is correct?
• A diagnosis code appears on the CMS present-on-admission exempt list. What is the correct POA reporting action?
• An inpatient record documents possible pneumonia at admission. At discharge the condition remains uncertain but is still coded under the inpatient uncertain-diagnosis guideline. How should POA be approached?
• A condition is described in the discharge summary as present on admission, and admission history and physical findings support that it existed at entry. Which POA conclusion follows?
• Clostridioides difficile infection is documented with onset clearly after several hospital days, with no evidence of community onset at admission. Which POA assignment is appropriate?
• Why does accurate POA assignment matter for diagnoses linked to hospital-acquired condition (HAC) payment provisions?
• An NCCI Procedure-to-Procedure (PTP) edit pairs a comprehensive hospital outpatient procedure with a component procedure on the same date of service. What is the coding implication?
• A Medically Unlikely Edit (MUE) applies to a hospital outpatient HCPCS/CPT service. What does the MUE represent?
• A Local Coverage Determination (LCD) or National Coverage Determination (NCD) lists covered indications for a hospital outpatient procedure. How should diagnosis coding relate to that policy?
• A hospital outpatient coder sees an NCCI PTP edit between two CPT codes and is considering a modifier to override it. When is the override appropriate?
• During hospital outpatient claim scrubbing, which tool is designed to flag incorrect coding combinations and related outpatient editing issues before submission?
• A facility claim returns an age/sex conflict edit. What does this type of edit typically indicate?
• A hospital outpatient claim is returned for a procedure-diagnosis inconsistency. What is the most appropriate coding response?
• A same-day hospital outpatient claim triggers a duplicate procedure edit for a service already paid for that patient on the same date. What is the edit designed to prevent?
• Under hospital outpatient device-to-procedure edit logic, when is a device HCPCS code typically acceptable on the claim?
• An inpatient coder sequences an external cause code as the principal diagnosis and the claim fails a coding validation edit. Why is this sequencing typically invalid?
• A hospital outpatient service is denied because it exceeds the payable frequency for the coverage period. What type of edit concept does this represent?
• An encoder warns of an NCCI conflict on a hospital outpatient account. What is the coder’s most appropriate next step?
• Under the inpatient prospective payment system, which statement best describes what drives MS-DRG assignment?
• How can a documented and correctly coded MCC on the secondary diagnosis list affect inpatient payment?
• Under hospital OPPS APC payment, what commonly happens to many ancillary outpatient services billed with a significant procedure?
• Why should a hospital outpatient coder understand OPPS status indicators?
• A hospital’s case mix index (CMI) rises. What does that change most directly reflect?
• A Medicare inpatient is transferred to another acute care hospital. Why might IPPS payment for the transferring hospital differ from a full DRG payment?
• When may an inpatient case qualify for an additional IPPS outlier payment beyond the base MS-DRG amount?
• In hospital outpatient coding, why can a clinic visit and a separately reported procedure map to different APC outcomes?
• A CPT procedure on the CMS inpatient-only list is performed. What is the key outpatient payment implication for hospital OPPS?
• At a conceptual level, how is the basic IPPS operating payment for an MS-DRG approximated before many hospital-specific adjustments?
• Why must inpatient coders accurately report operating room procedures that meet coding guidelines?
• Which action is appropriate when a possible MCC appears clinically relevant to inpatient payment but is not clearly documented?
• When abstracting the principal diagnosis for an inpatient stay, which approach best reflects coding guidelines?
• For inpatient ICD-10-PCS coding, which document is typically the primary source for procedure details such as approach, devices, and objectives?
• For a hospital treat-and-release emergency department encounter, what is the key abstract source for outpatient ED diagnosis and procedure coding?
• A medication administration record shows insulin was given during an inpatient stay, but the provider has not documented diabetes. What is the correct abstraction approach?
• A hospital coder reviews an inpatient admission for MS-DRG assignment. Which record source is most useful for abstracting chronic conditions documented as present on admission and comorbid history?
• When may a facility coder appropriately abstract a diagnosis from a pathology or radiology report during inpatient coding?
• While abstracting an inpatient orthopedic case, the history and physical documents a right-knee procedure indication, but the operative report describes the left knee. What should the coder do?
• A hospital outpatient coder abstracts a patient who had related procedures across two hospital outpatient encounters on different calendar dates. What practice best supports correct claim submission?
• Why must a hospital inpatient coder abstract discharge disposition accurately from the discharge record?
• A consulting nephrologist documents and manages acute kidney injury during an inpatient stay. The attending’s notes reference the consult. How should the facility coder treat the consultant’s documented condition?
• The operative schedule lists a laparoscopic cholecystectomy, but documentation shows the case was cancelled in pre-op and never performed. What is the correct coding approach for that procedure?
• When should a hospital coder abstract social determinants of health using ICD-10-CM Z codes?
• In inpatient MS-DRG grouping, what is the role of a documented secondary diagnosis such as acute kidney injury?
• A chronic condition appears on the inpatient problem list. Why might it still fail to act as a CC for MS-DRG payment?
• Clinical indicators support malnutrition, but severity (mild, moderate, or severe) is not specified. Why might the coder query for severity?
• A secondary condition is clinically integral to the principal diagnosis and appears on a CMS exclusion pair for that principal. What is the expected MS-DRG effect?
• Hospital coding quality dashboards track CC/MCC capture rates. Which statement reflects ethical practice?
• An inpatient has clinical indicators and provider documentation of acute encephalopathy. From a CC/MCC identification perspective, why does this matter?
• A remote, resolved condition appears on an old problem list but was not evaluated, treated, or monitored during the current inpatient stay. How should it affect CC/MCC capture?
• An inpatient abstract includes two valid CC-level secondary diagnoses and no MCC. What is the MS-DRG severity result?
• For a procedure-driven surgical MS-DRG, which statement about severity is correct?
• A coder compares inpatient MS-DRG severity with hospital outpatient APC payment. Which distinction is accurate?
• A secondary diagnosis is correctly assigned POA = Y. Does that alone establish it as a CC or MCC?
• When an inpatient record supports both a valid CC and a valid MCC secondary diagnosis, which MS-DRG severity outcome typically results?