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    v1.0.30
    OpenPayerBilling CodesPatient SafetyCPT cpt-6045f-no-summary-available
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    CPT 6045F: Thyroid Function Testing Documented and Interpreted

    CPT code 6045F denotes documentation that thyroid function testing was performed with results documented and interpreted; it represents a clinical billing entry used when laboratory assessment of thyroid status is completed and the findings are recorded in the patient record. The service type is laboratory testing with interpretation, typically provided in outpatient clinic or ambulatory laboratory settings where clinicians order and review thyroid panel results as part of endocrine evaluation or medication management.

    For related coverage guidance, see recent payer policy updates: Long-Acting Injectable Antiretroviral Agents for HIV, B-Hemolytic Streptococcus Testing, Human Immunodeficiency Virus (HIV) — Coverage Criteria for Testing and Resistance Assays.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult presenting to an outpatient otolaryngology or head and neck surgery clinic with a palpable, symptomatic, or cosmetically concerning thyroid nodule or mass. The clinician evaluates history, physical exam, and thyroid function tests. Ultrasound imaging characterizes nodule size, composition, and suspicious sonographic features. Fine-needle aspiration (FNA) cytology may be performed for diagnostic sampling. When surgical management is indicated (benign enlarging nodule, symptomatic compression, suspicious cytology, or confirmed malignancy), the patient is scheduled for thyroidectomy or lobectomy in an ambulatory surgery center or hospital operating room. The workflow includes preoperative evaluation, informed consent, anesthesia (general), intraoperative identification and preservation of the recurrent laryngeal nerve and parathyroid glands, specimen removal, hemostasis, and wound closure. Postoperative care involves monitoring for airway compromise, calcium levels for hypocalcemia, pain control, and discharge instructions; typical sites of service are outpatient surgery centers and inpatient hospitals depending on case complexity and comorbidities.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    60240Thyroidectomy, total or completionCommon definitive procedure for malignant or multinodular disease; may be the primary operation related to the index service
    60210Excision of thyroid nodule, unilateral lobectomyPerformed when disease is limited to one lobe; alternative to total thyroidectomy
    60500Partial removal of thyroid or isthmusectomyUsed for small localized lesions or diagnostic excisional procedures
    76942Ultrasound guidance for fine needle aspirationPreoperative diagnostic step for nodule cytology that informs surgical planning
    60130Biopsy of thyroid, open (incisional)Diagnostic procedure that may precede definitive surgical management

    Related Modifiers

    7 rows

    ModifierDescriptionWhen to Use
    25CPT modifier 25 indicates that on the same day as another procedure or service, the same physician or other qualified health care professional provided a significant, separately identifiable…- When to apply: Use modifier 25 only on an E/M code to indicate the same provider delivered a significant, separately identifiable E/M service on the same day as another procedure or service — i.e.,…
    57CPT® modifier -57 (“Decision for Surgery”) is appended to an Evaluation and Management (E/M) service when that encounter results in the initial decision to perform a major surgery (a procedure with a…- Use modifier 57 when an E/M service provided by the same provider (or same tax ID) on the day of or the day before a major surgical procedure (90‑day global period) results in the initial decision…
    54Modifier ‑54 (“Surgical care only”) is appended to a CPT surgical procedure when the reporting surgeon performs the intraoperative (surgical) component but does not furnish the preoperative and/or…- Use modifier -54 when the reporting surgeon provided only the intraoperative (surgical) component of a procedure and preoperative and/or postoperative management has been or will be provided by…
    55Modifier –55 indicates the billing provider furnished only postoperative management for a procedure that has a global surgical period. According to AAPC, this modifier is appended to the same CPT…- Use modifier -55 when billing the same CPT surgical code that has a 10- or 90-day global period and you, as a provider other than the original surgeon, furnished ONLY postoperative management (no…
    79Modifier 79 indicates a surgical procedure performed during the postoperative global period of a prior surgery that is unrelated to the original procedure. Per AMA/CPT and CMS guidance, it is…- Use modifier 79 when the same physician (or same‑specialty physician in the same group) performs a surgical procedure during the postoperative global period of a prior surgery and the new procedure…
    58Modifier 58 (Staged or related procedure/service by the same physician during the postoperative period) indicates that a subsequent procedure performed by the same provider during the…- Use modifier 58 when the same physician/QHP performs a procedure during the postoperative/global period of an earlier procedure and the subsequent procedure is either planned or anticipated…
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    208000000X
    207L00000X
    363L00000X
    207K00000X
    282J00000X
    364SG0600X
    207PH0002X
    207Q00000X

    Related ICD-10-CM Codes

    26 rows

    ICD-10-CM CodeDescription
    F32.9Major depressive disorder, single episode, unspecified
    F41.9Anxiety disorder, unspecified
    F43.21Adjustment disorder with depressed mood
    G44.1Vascular headache, not elsewhere classified
    G47.00Insomnia, unspecified
    G47.9Sleep disorder, unspecified
    J02.9Acute pharyngitis, unspecified
    J06.9Acute upper respiratory infection, unspecified
    M25.50Pain in unspecified joint
    M54.2Cervicalgia

    Showing 1–10 of 26

    Related Payer Policy Updates

    Specialty: Infectious Disease1 / 3

    10 rows

    PolicyPayerEffective Date
    Long-Acting Injectable Antiretroviral Agents for HIVColorado Rocky Mountain Health Plans2026-10-01
    B-Hemolytic Streptococcus TestingOscar Health2026-10-01
    Human Immunodeficiency Virus (HIV) — Coverage Criteria for Testing and Resistance AssaysOscar Health2026-10-01
    Hepatitis Testing (A, B, C, D) Coverage CriteriaOscar Health2026-10-01
    Lyme Disease Testing Coverage CriteriaOscar Health2026-10-01
    Pathogen Panel TestingOscar Health2026-10-01
    Diagnostic Testing of Common Sexually Transmitted InfectionsOscar Health2026-10-01
    Coronavirus Testing in the Outpatient SettingOscar Health2026-10-01
    Testing for Vector-Borne InfectionsOscar Health2026-10-01
    Testing for Diagnosis of Active or Latent TuberculosisOscar Health2026-10-01

    Related Codes

    CPT-6005F-NO-SUMMARY-AVAILABLE

    CPT 6005F: Procedure Specification 6005F

    CPT-6010F-PERFORMANCE-MEASURE

    CPT 6010F: Performance Measure Code

    CPT-6015F-UNKNOWN-SERVICE

    CPT 6015F: Quality Measure Observation

    CPT-6020F-NO-SUMMARY-AVAILABLE

    CPT 6020F: No Summary Found for Clinical Documentation

    CPT-6030F-STERILE-PROCEDURE-ADHERENCE-PERFORMANCE-MEASURE

    CPT 6030F: Sterile Procedure Adherence Performance Measure

    CPT-6040F-UNKNOWN-SERVICE

    CPT 6040F: Thyroid or Neck Procedure/Assessment

    CPT-6070F-BRIEF-CLINICAL-DESCRIPTION

    CPT 6070F: Documentation of Normal Pelvic Examination

    CPT-6080F-CLINICAL-PERFORMANCE-MEASURE

    CPT 6080F: Postoperative Evaluation or Management

    CPT-6090F-SPECIFIC-CPT-PERFORMANCE-ITEM

    CPT 6090F: No Summary Available

    CPT-6100F-NO-SUMMARY-AVAILABLE

    CPT 6100F: Performance Measure / Quality Reporting Element

    Showing 1–10 of 14

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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