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The CPT® Code 84244 refers to a laboratory test specifically designed to measure the levels of renin in the blood. Renin is an important enzyme produced by the kidneys, which plays a crucial role in the regulation of blood pressure and fluid balance within the body. It is released in response to low sodium levels or a decrease in blood volume, initiating a cascade of hormonal responses that involve angiotensin and aldosterone. These hormones work together to help maintain mean arterial pressure, which is vital for ensuring adequate blood flow to organs and tissues. Elevated renin levels can indicate various medical conditions, including Addison's disease, cirrhosis, congestive heart failure, dehydration, hemorrhage, hypertension, hypokalemia, nephrotic syndrome, and renal tumors. Conversely, decreased renin levels may be associated with conditions such as hyperaldosteronism, the use of steroids, sodium-sensitive hypertension, or treatment with antidiuretic hormone (ADH). This test is often ordered alongside the Aldosterone test (CPT® Code 82088) to provide a more comprehensive assessment of the renin-angiotensin-aldosterone system. The blood sample required for this test is obtained through a procedure known as venipuncture, which is separately reportable. The analysis of the plasma involves two specific testing methods: a quantitative immunoradiometric assay for direct renin measurement and a quantitative radioimmunoassay for assessing plasma renin activity. These methodologies ensure accurate quantification of renin levels, aiding healthcare providers in diagnosing and managing related health conditions.
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The renin test (CPT® Code 84244) is indicated for the evaluation of various medical conditions that may affect blood pressure regulation and fluid balance. The following conditions may warrant the performance of this test:
The procedure for measuring renin levels involves several key steps that ensure accurate results. The first step is the collection of a blood sample, which is performed through a process known as venipuncture. This involves inserting a needle into a vein, typically in the arm, to draw blood into a collection tube. It is important that the blood sample is obtained under appropriate conditions, as factors such as posture and time of day can influence renin levels. Once the blood sample is collected, it is processed to separate the plasma from the cellular components. The plasma is then subjected to two specific testing methodologies. The first method is a quantitative immunoradiometric assay, which is used to measure direct renin levels in the plasma. This assay utilizes antibodies that specifically bind to renin, allowing for precise quantification. The second method employed is a quantitative radioimmunoassay, which assesses plasma renin activity. This technique measures the enzymatic activity of renin in the plasma, providing additional context to the direct measurement of renin levels. Both assays are critical for obtaining a comprehensive understanding of the renin-angiotensin-aldosterone system and its role in the patient's health status.
After the renin test is performed, there are generally no specific post-procedure care requirements for the patient. However, it is advisable for patients to remain hydrated and to follow any additional instructions provided by their healthcare provider. The results of the renin test will typically be reviewed in conjunction with other clinical findings and tests, such as the aldosterone test, to provide a complete picture of the patient's condition. Healthcare providers will interpret the results based on the patient's overall health status and any underlying medical conditions. Follow-up appointments may be necessary to discuss the results and any further diagnostic or therapeutic steps that may be indicated.
| Short Descr | ASSAY OF RENIN | Medium Descr | ASSAY OF RENIN | Long Descr | Renin | 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 | 2 | CCS Clinical Classification | 233 - Laboratory - Chemistry and Hematology |
| 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. | 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. | 26 | Professional component: certain procedures are a combination of a physician or other qualified health care professional component and a technical component. when the physician or other qualified health care professional component is reported separately, the service may be identified by adding modifier 26 to the usual procedure number. | 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. | 76 | Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service. | 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. | CR | Catastrophe/disaster related | GA | Waiver of liability statement issued as required by payer policy, individual case | GC | This service has been performed in part by a resident under the direction of a teaching physician | GW | Service not related to the hospice patient's terminal condition | 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 | GZ | Item or service expected to be denied as not reasonable and necessary | Q4 | Service for ordering/referring physician qualifies as a service exemption | X5 | Diagnostic services requested by another clinician: for reporting services by a clinician who furnishes care to the patient only as requested by another clinician or subsequent and related services requested by another clinician; this modifier is reported for patient relationships that may not be adequately captured by the above alternative categories; reporting clinician service examples include but are not limited to, the radiologist's interpretation of an imaging study requested by another clinician |
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| 2013-01-01 | Changed | Medium Descriptor changed. |
| Pre-1990 | Added | Code added. |
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