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Methemoglobin is a form of hemoglobin, the protein in red blood cells responsible for transporting oxygen throughout the body. In methemoglobin, the iron within the heme group is oxidized to the ferric state, which prevents it from effectively releasing oxygen to tissues. Normally, about 1-2% of hemoglobin in the human body exists as methemoglobin; however, elevated levels can occur due to genetic factors or more commonly, as a result of exposure to certain drugs or environmental toxins. The measurement of methemoglobin levels is crucial in diagnosing conditions related to oxygen transport and can help identify potential toxic exposures. To obtain a sample for this test, a venipuncture is performed, which is a separate procedure that must be reported accordingly. It is important to distinguish between the tests for the presence of methemoglobin and the quantitative measurement of its levels, as different CPT® codes are used for each. Specifically, CPT® Code 83050 is utilized when quantifying the amount of methemoglobin in the blood.
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The measurement of methemoglobin levels is indicated in various clinical scenarios, particularly when there is a suspicion of methemoglobinemia, which can lead to impaired oxygen delivery to tissues. The following conditions may warrant this test:
The procedure for measuring methemoglobin levels involves several key steps, which are outlined below:
After the venipuncture, patients may experience minor discomfort or bruising at the site of the blood draw, which typically resolves quickly. There are no specific post-procedure care instructions required for this test, but patients should be advised to report any unusual symptoms, such as excessive bleeding or signs of infection at the puncture site. The results of the methemoglobin test will be interpreted by the healthcare provider, who will discuss the findings and any necessary follow-up actions based on the results.
| Short Descr | HGB METHEMOGLOBIN QUAN | Medium Descr | HEMOGLOBIN METHEMOGLOBIN QUANTITATIVE | Long Descr | Hemoglobin; methemoglobin, quantitative | 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 |
| 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. | 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. | GZ | Item or service expected to be denied as not reasonable and necessary | 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. | 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 |
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| 2023-01-01 | Note | Short description changed. |
| Pre-1990 | Added | Code added. |
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