CHONC Preparation Guide: Hematology and Oncology Coding Decisions Study Guide

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A referral says breast cancer, but the oncology note documents completed treatment, no residual disease and evaluation of new fatigue. Abstract the current assessment and encounter purpose before deciding whether active malignancy, history or a symptom belongs on the claim.

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An Index entry leads to a drug adverse-effect category ending with a dash. Open the Tabular List, identify the required placeholders and encounter character, and verify the associated manifestation before assigning the complete diagnosis sequence.

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An outpatient hematologist documents enlarged cervical nodes confined to the neck and possible lymphoma, with biopsy planned next week. Assign R59.0 for localized enlarged lymph nodes. Do not assign lymphoma, generalized lymphadenopathy or a neoplasm-behavior diagnosis without supporting documentation.

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The final pathology and provider assessment identify a benign lesion of a specified organ. Follow the relevant histological Index entry and behavior column, then verify the site code instead of choosing a malignant category because oncology evaluated the patient.

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A patient with active colon cancer undergoes a procedure directed solely at a documented liver metastasis. For this treatment encounter, sequence the secondary liver malignancy before the primary colon malignancy, after checking any applicable specific instructions.

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A breast primary was eradicated, treatment to that site ended, and the provider documents no remaining breast malignancy. Active bone metastases are still treated. Report the active secondary disease and the appropriate history of the former primary.

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The note documents active adenocarcinoma of the sigmoid colon, scheduled antineoplastic chemotherapy administered as planned, and no other condition requiring coding. Assign Z51.11 first, followed by C18.7, malignant neoplasm of sigmoid colon. C18.7 first would miss the specific chemotherapy-encounter sequencing rule.

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The physician documents active gastric carcinoma with its gastric subsite unspecified and anemia caused by that malignancy, expressly excluding treatment-induced anemia. Only the anemia is treated today. Assign C16.9 first, followed by D63.0. Do not substitute D64.81, which describes antineoplastic chemotherapy-induced anemia.

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A patient with active sigmoid-colon cancer receives active treatment today for newly assessed anemia explicitly caused by correctly administered antineoplastic chemotherapy. No chemotherapy is given today. Assign D64.81, C18.7 and T45.1X5A, in that order. There is no documented medication error to support poisoning.

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The oncologist documents dehydration due to the malignancy and provides treatment solely for dehydration; scheduled cancer treatment is deferred. Sequence dehydration before the neoplasm, then separately assess whether the documented fluid administration supports a reportable hydration service.

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A patient with metastatic disease attends a visit devoted to adjustment of treatment for explicitly documented cancer-related pain. Sequence neoplasm-related pain first for this pain-management encounter and report the underlying malignancy as an additional diagnosis.

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A follow-up note lists multiple myeloma but describes disease status inconsistently between the assessment and copied history. Clarify the current status before selecting the status-specific code rather than assuming remission because the patient is on surveillance.

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One record describes a reaction to the correctly administered prescribed infusion; another documents an accidental overdose of the same drug. Classify the first as an adverse effect and the second as poisoning before constructing their different diagnosis sequences.

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A hematologist documents a specific anemia type that the Index directs to an other-specified category. Use that direction. In a separate encounter documenting only anemia without type, an unspecified classification may accurately represent the available information.

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A patient attends an asymptomatic surveillance visit after completed treatment for sigmoid-colon cancer. The physician documents no residual or recurrent malignancy, no further cancer-directed treatment and no other reportable condition. Assign Z08 followed by Z85.038, personal history of other malignant neoplasm of large intestine. If the same evaluation instead establishes recurrent sigmoid-colon malignancy, report the established current malignancy rather than Z08.

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A Medicare patient saw another oncologist in the same specialty and group 18 months ago and now meets a newly hired oncologist there. Treat the patient as established for office E/M selection despite the new physician relationship.

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An established patient’s chronic immune thrombocytopenia and chronic iron-deficiency anemia are both at their documented treatment goals. The hematologist assesses both, reviews a CBC and ferritin, and continues prescription prednisone after evaluating response. Two stable chronic illnesses establish moderate problems; two unique tests establish low data; prescription management establishes moderate risk. Two moderate elements support 99214.

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An oncology note lists diabetes and hypertension but only assesses cancer treatment tolerance. Neither listed condition automatically increases the problem count. If the clinician analyzes diabetes-related treatment constraints and changes the oncology plan, that documented work becomes relevant.

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An oncologist compares three serial CBC-with-differential results and discusses their hemoglobin and platelet components. This represents one unique test. Adding review of a separately identified ferritin test gives two unique tests, supporting low data when no other qualifying data work occurs.

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For an established office patient, the oncologist documents 12 minutes reviewing records, 20 evaluating and counseling, and 8 completing the note that day. A separately billed procedure takes another 10 minutes. The qualifying E/M total is 40 minutes, supporting 99215 by time when the E/M is independently reportable.

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Two notes contain different numbers of examination bullets but document the same moderate MDM. With no time-based selection, both support the same MDM level; the longer template does not earn a higher office E/M code.

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A hematologist assesses response to prescription prednisone and decides to continue it. This supports moderate management risk. Reviewing a CBC to assess disease control does not automatically establish intensive toxicity monitoring or high overall MDM.

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During a scheduled infusion visit, the physician separately evaluates a newly reported problem and develops a distinct management plan beyond routine infusion assessment. If the documented E/M meets the applicable criteria, append modifier 25 to that E/M service.

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An oncologist evaluates a patient during a hospital admission and later sees that patient in the office. Classify each service within its actual setting before applying the relevant initial/subsequent or new/established rules and determining the supported level.

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An NP follows an existing physician-established oncology plan but independently diagnoses and treats a new unrelated complaint. Physician incident-to billing for that new problem is not established merely because the patient has an ongoing cancer treatment relationship with the practice.

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In a freestanding Medicare office, a lawfully qualified leased RN gives a medically necessary injection under the physician’s established plan, with no new problem. The physician remains actively involved. The practice pays the RN’s leasing charge and purchases the drug and supplies. The service has no 010 or 090 global indicator, and the physician is immediately available throughout through real-time audio and video. These facts satisfy the described treatment-plan, personnel, expense and supervision conditions. A physician reachable only by telephone would not satisfy this audiovisual supervision pathway.

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For a time-based hospital split/shared visit, a physician works 25 minutes alone, an NP works 15 minutes alone, and both work together for 10 minutes. Total distinct time is 50 minutes; physician participation is 35 minutes and exceeds half. In a separate noncritical hospital visit without prolonged services, the NP drafts a plan, and the physician personally makes or approves the management decisions for the addressed problems and documents responsibility for that plan and its management risk. This can establish the physician’s substantive MDM even without majority time. Merely countersigning the NP’s completed plan without that substantive work would not establish the MDM pathway.

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A resident evaluates an oncology inpatient, but the attending only signs the resident’s note without documenting required participation. The signature alone does not substantiate teaching-physician billing; the record must demonstrate the attending’s qualifying personal role in the service.

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A Medicare beneficiary is referred to an office hematologist for an opinion on persistent anemia. Select an appropriate office E/M category and supported level using patient status; do not choose a consultation code solely because the referral requests one.

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A new patient receives a minor procedure after the clinician performs only the routine assessment necessary to decide on and carry it out. Do not add an E/M solely because this is the patient’s first visit.

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Two services encounter an active NCCI edit with indicator 1. Review whether separate encounters, qualifying anatomical separation or another recognized distinction actually occurred before assigning a modifier; the indicator alone does not establish separate reportability. If the record documents genuinely separate anatomical structures that meet the edit’s exception, use the appropriate anatomical or distinct-service modifier supported by that circumstance, rather than relying on two diagnosis codes.

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An Original Medicare fee-for-service beneficiary’s usually covered test is expected to exceed its frequency limit. Before performing it, identify the test, explain the exceeded limit, give an estimated cost and allow the beneficiary to choose among the ABN options without pressure.

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The clinician documents aspiration and core biopsy through the same site during one diagnostic encounter. Select the combined service when its requirements are met instead of separately reporting the aspiration and biopsy simply because two specimens were obtained.

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A Medicare procedure note describes aspiration and core biopsy of the left iliac bone through different skin incisions during one encounter. Report the combined marrow service; the incision difference does not support separate aspiration and biopsy reporting.

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A physician-office patient presents for chemotherapy. Ondansetron runs from 08:30 to 08:50, followed by the antineoplastic infusion from 09:00 to 10:00 through the same access. Report 96413 and 96367, one unit each. The primary treatment determines the initial service; the 20-minute premedication is an infusion rather than a push.

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A hospital outpatient receives ondansetron by IV infusion from 08:30 to 08:50 and chemotherapy from 09:00 to 10:00, without overlap or interruption. Select 96413 as initial under the hierarchy and 96367 for the separate therapeutic infusion. Do not use 96375 for the 20-minute infusion or 96417 for the antiemetic.

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A standalone nonchemotherapy medication is documented as infused intravenously over 12 minutes. Report 96374 for the initial therapeutic IV push when its service requirements are met. If another administration is initial, evaluate the appropriate additional-push code instead.

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A standalone therapeutic IV infusion runs continuously from 09:00 to 10:31. Report 96365 and one unit of 96366. At a stop time of 10:30, only 96365 would be supported because the additional interval would be exactly 30 minutes.

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In a Medicare office encounter, chemotherapy runs from 09:00 to 10:00 and a separately prepared, qualifying nonchemotherapy antiemetic runs concurrently through the same IV access from 09:10 to 09:40. Report 96413 and one unit of 96368. Another qualifying concurrent therapeutic drug or additional concurrent duration does not support another 96368 unit; simultaneous hydration adds no hydration administration code. By contrast, if the antiemetic runs from 08:30 to 08:50 and chemotherapy runs from 09:00 to 10:00 through the same access, report 96413 and one unit of 96367.

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A chemotherapy drug diluted in saline runs from 09:00 to 10:30 as the only administration. The saline has no independent hydration purpose. Report 96413 for the qualifying chemotherapy infusion. Do not add hydration codes or 96415: the carrier is incidental and the infusion reaches only 30 minutes beyond the first hour.

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An independently ordered, medically necessary hydration infusion in a freestanding office runs from 14:00 to 15:15 without overlapping medication administration. Report 96360 only. The additional 15 minutes does not support 96361, and hydration alone does not support therapeutic drug infusion code 96365.

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An infusion record includes routine port access, standard tubing and a final flush during the same treatment session. Treat these as included components of the administration rather than adding separate access or flush services to the claim.

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A freestanding Medicare office documents methotrexate, a nonradionuclide antineoplastic agent, infused intravenously from 09:00 to 10:00 for rheumatoid arthritis, with the required administration work and monitoring. As the only administration, it supports 96413 despite the noncancer diagnosis. A separate encounter consisting solely of a 20-minute ondansetron IV infusion supports 96365, not chemotherapy administration. If that antiemetic instead precedes chemotherapy during one encounter, evaluate 96367 for its sequential infusion.

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A supportive medication is documented as a subcutaneous injection in the upper arm. Select the administration family and route that match that record, then separately determine the drug product and billing quantity rather than assuming an IV service.

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A hematologist orders blood removal as treatment for a documented disorder and also sends a sample for laboratory analysis. Identify therapeutic phlebotomy from the treatment purpose, then evaluate the laboratory and collection services under their separate coding and bundling rules.

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A 68-year-old Original Medicare Part B beneficiary receives only a purchased, preservative-free, split-virus trivalent influenza vaccine, 0.5 mL intramuscularly in a freestanding physician office. Report 90656 for the product and G0008 for administration, with Z23. Do not add an office E/M merely for the routine vaccination assessment.

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A record documents 3 mL administered from a 20 mg/mL solution. The dose is 60 mg. If the applicable HCPCS descriptor represents 10 mg per unit, report six administered units rather than three volume units or one vial unit.

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With a 10 mg billing unit, 80 mg administered and 20 mg discarded from a 100 mg single-dose vial yield eight administered units and two units on a separate JW line. In contrast, 7 mg administered and 3 mg discarded from a 10 mg single-dose vial yield one full unit with JZ under CMS’s below-one-unit exception, with no JW line. Document both the actual dose and physical discard in either case.

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A provider documents thrombocytopenia after reviewing a CBC. Recognize the platelet abnormality rather than substituting anemia or a general white-cell disorder, then determine whether the provider has documented a cause that changes the specific diagnosis selection.

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An outpatient note diagnoses leukocytosis and plans further investigation. Recognize an elevated white-cell count, not confirmed leukemia, and report the established condition without upgrading it to malignancy simply because hematologic cancer is among the diagnostic possibilities.

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One note documents only anemia; another explicitly diagnoses aplastic anemia. Preserve that difference during Index lookup and Tabular verification rather than assigning the same generic anemia category to both because each patient has a reduced red-cell measure.

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A pathology report identifies a sarcoma within an organ where carcinomas are more common. Preserve the sarcoma terminology and follow the appropriate histological coding pathway rather than replacing it with the usual epithelial cancer category for that organ.

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A provider establishes a specific lymphoma after investigating enlarged nodes. Preserve the lymphoma diagnosis and documented subtype instead of selecting leukemia because the condition involves white-cell biology, or coding only node enlargement after the diagnosis has been established.

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The final diagnosis states carcinoma in situ with no invasion identified. Select the supported in situ classification rather than an invasive malignant category, even if the treatment involves surgical removal and the visit occurs in an oncology service.

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A hematologist investigates abnormalities involving several blood-cell types and obtains marrow specimens. Connect the investigation to red marrow’s blood-forming role rather than assuming that every biopsy taken through a bone evaluates a primary bone-structure disorder.

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A note discusses reduced oxygen-carrying capacity and evaluates the red-cell system. Associate that work with erythrocytes and hemoglobin, while using the clinician’s final diagnosis to distinguish established anemia from an isolated abnormal finding still under investigation.

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A note identifies a reduced neutrophil population rather than a reduction of every leukocyte type. Recognize neutrophils as one granulocyte subgroup and preserve the provider’s specific diagnosis instead of substituting a nonspecific white-cell label.

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A hematologist evaluates bruising and documents a platelet disorder after reviewing the record. Connect the diagnosis to platelet clot-forming function rather than confusing it with an erythrocyte disorder, then preserve the specific diagnosis and documented cause.

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A laboratory order specifies examination of a blood-fluid component rather than a cell count. Distinguish the fluid portion from the formed elements and use the actual ordered test description, rather than assuming every hematology order is a CBC.

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A surgeon identifies and removes mapped sentinel nodes near a known primary tumor. Recognize that sentinel status describes lymphatic drainage; report nodal malignancy only when the documented diagnosis establishes involvement rather than assuming all mapped nodes contain metastasis.