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The CPT® Code 84591 refers to the testing of a vitamin that is not specifically categorized under any other existing code. This procedure is utilized when there is a need to measure the levels of certain vitamins, such as biotin and niacin, which may not have dedicated codes for their assessment. The process begins with the collection of a blood sample, which is obtained through a procedure known as venipuncture. This step is crucial as it provides the specimen necessary for analysis. Following the collection, the vitamin levels are quantified using advanced techniques such as high-performance liquid chromatography (HPLC) or other appropriate methodologies. These methods are essential for accurately determining the concentration of the vitamin in the blood, thereby aiding in the assessment of the patient's nutritional status or potential deficiencies.
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The procedure associated with CPT® Code 84591 is indicated for the assessment of vitamin levels in patients when specific vitamin deficiencies or excesses are suspected but do not fall under the categories of other established codes. This testing may be warranted in the following scenarios:
The procedure for CPT® Code 84591 involves several key steps that ensure accurate testing of vitamin levels. First, a healthcare professional performs a venipuncture, which is the process of puncturing a vein to obtain a blood sample. This step is critical as it provides the specimen needed for analysis. Once the blood sample is collected, it is sent to a laboratory for testing. In the laboratory, the sample undergoes analysis using high-performance liquid chromatography (HPLC) or other validated methodologies. HPLC is a sophisticated technique that separates, identifies, and quantifies each component in the blood sample, allowing for precise measurement of the vitamin levels present. The results of this analysis will inform healthcare providers about the patient's vitamin status and help guide any necessary interventions.
After the procedure associated with CPT® Code 84591, patients may experience minimal to no discomfort from the venipuncture. It is generally recommended that patients maintain hydration and follow any specific instructions provided by their healthcare provider regarding post-procedure care. The results of the vitamin level testing will typically be available within a few days, and healthcare providers will discuss the findings with the patient to determine if any further action or treatment is necessary based on the results. Additionally, if deficiencies are identified, appropriate dietary modifications or supplementation may be recommended to address the patient's nutritional needs.
| Short Descr | ASSAY OF NOS VITAMIN | Medium Descr | ASSAY OF VITAMIN NOT OTHERWISE SPECIFIED | Long Descr | Vitamin, not otherwise specified | Status Code | Statutory Exclusion (from MPFS, may be paid under other methodologies) | Global Days | XXX - Global Concept Does Not Apply | PC/TC Indicator (26, TC) | 9 - Not Applicable | Multiple Procedures (51) | 9 - Concept does not apply. | Bilateral Surgery (50) | 9 - Concept does not apply. | Physician Supervisions | 09 - Concept does not apply. | Assistant Surgeon (80, 82) | 9 - Concept does not apply. | Co-Surgeons (62) | 9 - Concept does not apply. | Team Surgery (66) | 9 - Concept does not apply. | Diagnostic Imaging Family | 99 - Concept Does Not Apply | CLIA Waived (QW) | No | APC Status Indicator | Conditionally packaged laboratory tests | Type of Service (TOS) | 5 - Diagnostic Laboratory | Berenson-Eggers TOS (BETOS) | T1H - Lab tests - other (non-Medicare fee schedule) | MUE | 1 | CCS Clinical Classification | 233 - Laboratory - Chemistry and Hematology |
| 59 | Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25. | 90 | Reference (outside) laboratory: when laboratory procedures are performed by a party other than the treating or reporting physician or other qualified health care professional, the procedure may be identified by adding modifier 90 to the usual procedure number. | GA | Waiver of liability statement issued as required by payer policy, individual case | 91 | Repeat clinical diagnostic laboratory test: in the course of treatment of the patient, it may be necessary to repeat the same laboratory test on the same day to obtain subsequent (multiple) test results. under these circumstances, the laboratory test performed can be identified by its usual procedure number and the addition of modifier 91. note: this modifier may not be used when tests are rerun to confirm initial results; due to testing problems with specimens or equipment; or for any other reason when a normal, one-time, reportable result is all that is required. this modifier may not be used when other code(s) describe a series of test results (eg, glucose tolerance tests, evocative/suppression testing). this modifier may only be used for laboratory test(s) performed more than once on the same day on the same patient. | GY | Item or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit | XS | Separate structure, a service that is distinct because it was performed on a separate organ/structure | XU | Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service | GW | Service not related to the hospice patient's terminal condition | 77 | Repeat procedure by another physician or other qualified health care professional: it may be necessary to indicate that a basic procedure or service was repeated by another physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 77 to the repeated procedure or service. note: this modifier should not be appended to an e/m service. | GZ | Item or service expected to be denied as not reasonable and necessary | XE | Separate encounter, a service that is distinct because it occurred during a separate encounter |
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| 2013-01-01 | Changed | Medium Descriptor changed. |
| 2001-01-01 | Added | First appearance in code book in 2001. |
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