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Z85.850

Z85.850: Personal history of malignant neoplasm of thyroid

Billable / specific codeICD-10-CMPOA exempt

Z85.850 is a billable, specific ICD-10-CM code for personal history of malignant neoplasm of thyroid. It is valid for submission on a claim.

Check Z85.850 with the rest of the claim: free scrubber

Excludes2 inherited from the categories above Z85.850

Not part of this code, but both may be coded when both are present.

Written on Z85: Personal history of malignant neoplasm

  • personal history of benign neoplasm (Z86.01-)
  • personal history of carcinoma-in-situ (Z86.00-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

Z85.850 is named in 12 Medicare coverage policies: 12 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52479Oral Anticancer Drugs - Policy Article
  • A54768Billing and Coding: Cardiac Blood Pool Imaging (Multiple Gated Acquisition Scanning- MUGA, Ventriculography) When Performed in Conjunction with Cardiotoxic Chemotherapy
  • A57029Billing and Coding: Ultrasound, Soft Tissues of Head and Neck
  • A57204Billing and Coding: MRI and CT Scans of the Head and Neck

Alphabetic index entries that lead here

  • History›personal›malignant neoplasm›thyroid

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under Z85.85

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.