Z85

Personal history of malignant neoplasm

Z85 represents the ICD-10 category for 'Personal history of malignant neoplasm.' This crucial category is used to indicate that a patient has a past medical history of a malignant tumor that has been successfully treated or is in remission, and there is currently no evidence of recurrence, metastasis, or active disease. It is important to distinguish this from active malignant neoplasm codes (C00-D49), which describe current, active cancer. The Z85 codes are essential for comprehensive patient care, risk assessment, and long-term follow-up, as individuals with a history of cancer often require continued monitoring for recurrence or development of new primary cancers. This category includes codes that specify the site of the original malignant neoplasm, providing granular detail about the type of cancer the patient previously experienced. The 'personal history' designation implies that the primary treatment for the malignancy has been completed, and the patient is no longer receiving active cancer treatment for that specific neoplasm, though they may be undergoing surveillance or supportive care. These codes are not used when the patient is currently receiving treatment for the primary cancer or its metastases. Instead, they are used to document the historical fact of a malignancy when the primary reason for the encounter is not related to active cancer treatment but rather to other medical conditions or general follow-up. Using these codes accurately ensures proper documentation of a patient's health status, impacts risk stratification for other conditions, and aids in epidemiological studies. For example, a patient with a history of lung cancer who presents for a routine physical exam would have Z85.211 (or a more specific code) documented alongside their other conditions, rather than an active C-code for lung cancer. The specific codes within this category delineate the anatomical site of the past malignancy, such as bronchus and lung, breast, colon, or prostate, allowing for precise tracking of prior cancer diagnoses.

Clinical Symptoms

  • As a code for 'personal history' rather than an active disease, Z85 codes generally do not describe current symptoms.
  • However, individuals with a history of malignant neoplasm may experience long-term sequelae from previous cancer treatments (e.g., fatigue, pain, neuropathy, lymphedema, cognitive changes) or may present with symptoms indicative of a potential recurrence or new primary cancer, which would then be coded separately.
  • The 'history' itself is asymptomatic.

Common Causes

  • The 'causes' referred to by Z85 are the etiologies of the original malignant neoplasm, not the history itself.
  • Malignant neoplasms arise from a complex interplay of genetic, environmental, and lifestyle factors.
  • These can include genetic predispositions, exposure to carcinogens (e.g., tobacco smoke, asbestos, radiation, certain chemicals), chronic infections (e.g., HPV, HBV, HCV), obesity, alcohol consumption, and aging.
  • The specific causes vary widely depending on the type and site of the original cancer.

Documentation & Coding Tips

Always document the specific primary site and type of the past malignant neoplasm, along with its current status (e.g., 'in complete remission', 'no evidence of recurrence').

Example: Patient seen for routine annual surveillance. PMH: Personal history of Stage II invasive ductal carcinoma (IDC) of the left breast (C50.912), diagnosed in 2018, s/p lumpectomy, axillary dissection, 6 cycles of adjuvant chemotherapy (AC-T), and 5 years of adjuvant anastrozole. Completed anastrozole 3 months ago. Currently, patient is in complete clinical remission since 2019 with no evidence of recurrence on recent annual mammogram and clinical exam. Patient reports stable energy levels. Continue annual mammogram and oncology follow-up. This history actively informs her ongoing risk assessment and surveillance strategy, impacting current medication decisions (e.g., calcium/Vit D for bone health given prior anastrozole use).

Billing Focus: Specifying 'left breast IDC' (C50.912) and 'complete clinical remission since 2019' provides maximal specificity, allowing for accurate coding of Z85.30 (Personal history of malignant neoplasm of breast, unspecified). If the exact location within the breast was known and documented (e.g., upper-outer quadrant), an even more specific Z85.3- code could be used. Documentation of 'no evidence of recurrence' explicitly supports Z85 over an active malignancy code.

Clearly articulate how the personal history of malignant neoplasm impacts current care, medical decision-making, or surveillance plans, even if the patient is in remission.

Example: Patient presents with new onset dyspepsia. PMH: Personal history of Stage III colorectal adenocarcinoma (C18.9), diagnosed in 2020, s/p partial colectomy and adjuvant FOLFOX chemotherapy. Patient is currently in complete remission, confirmed by annual colonoscopy (most recent negative in Jan 2023) and stable CEA levels. Patient reports mild, stable chemotherapy-induced peripheral neuropathy (G62.0) in feet since completing FOLFOX. The current dyspepsia workup (considering PPI trial, H. pylori testing) acknowledges the patient's history of colorectal cancer and prior chemotherapy, increasing vigilance for potential gastric or esophageal involvement and guiding endoscopy decisions more urgently than in a patient without such history, impacting the overall complexity of medical decision making. Referral to GI for prompt endoscopy due to history of malignancy.

Billing Focus: Documenting 'colorectal adenocarcinoma' (C18.9) and 'complete remission' supports Z85.0 (Personal history of malignant neoplasm of digestive organs). Crucially, linking the history to the current dyspepsia and increased vigilance for GI involvement justifies the medical necessity for further diagnostic workup (e.g., endoscopy) and potentially a higher E/M service level due to increased complexity of medical decision-making. The mention of 'chemotherapy-induced peripheral neuropathy' is a distinct billable condition.

Relevant CPT Codes

  • 99214 - Office or other outpatient visit, established patient

    Many follow-up and surveillance visits for patients with a personal history of malignant neoplasm will involve moderate complexity medical decision making due to the need to assess for recurrence, manage long-term side effects of treatment, and coordinate ongoing surveillance (e.g., ordering imaging, labs, referrals).

  • 77067 - Screening mammography, bilateral

    Patients with a personal history of breast cancer (Z85.30) require ongoing surveillance mammography, often annually, to detect potential recurrence or new primary malignancies.

  • 45378 - Colonoscopy, diagnostic

    Patients with a personal history of colorectal cancer (Z85.0) require regular surveillance colonoscopies to monitor for recurrence or new polyps.

  • 82379 - Carcinoembryonic antigen (CEA)

    CEA levels are often monitored in patients with a history of colorectal cancer (Z85.0) as a tumor marker for surveillance of recurrence.

  • 96040 - Medical genetics and genetic counseling services

    Patients with a personal history of certain cancers (e.g., breast, ovarian, colorectal) may have a genetic predisposition, necessitating genetic counseling for themselves and their family members (e.g., if BRCA or Lynch syndrome identified, impacting Z15.01).

Related Diagnoses

Hierarchy