{"procedure":{"code_type":"CPT","code":"83873","lay_name":"Myelin basic protein test in spinal fluid","blurb":"A test that measures myelin basic protein, released when nerve insulation breaks down, in a sample of cerebrospinal fluid.","slug":"cpt-83873-myelin-basic-protein-test-in-spinal-fluid","description":"ASSAY OF CSF PROTEIN","name_source":"llm:claude-opus-5","name_reviewed":false,"ccs":{"code":"233","label":"Laboratory - Chemistry and Hematology","surgery_flag":"n/a"}},"settings":{"outpatient":{"setting":"outpatient","computed_at":"2026-09-25T11:55:12.319193Z","corpus_loaded_through":"2026-09-25T01:10:45.071082Z","filing_date_min":"2023-03-09","filing_date_max":"2026-09-22","checked_from":"2026-09-05T02:22:45.003818Z","checked_through":"2026-09-25T01:14:07.150894Z","n_priced_setters":3956,"n_filed":2455,"n_usable":2229,"n_not_usable":0,"n_labelled":135,"n_no_cash":90,"n_estimated":1,"n_states":50,"cash_p10":18.92,"cash_p20":30.15,"cash_p25":36.4,"cash_p50":72.3,"cash_p75":136.0,"cash_p80":154.2,"cash_p90":222.4,"cash_mean_trimmed":78.73,"gross_p50":122.72,"cash_to_gross_p50":0.6,"medicare_rate":null,"medicare_schedule":null,"medicare_year":null,"cash_to_medicare_p50":null,"by_state":[{"state":"AK","n":10,"p20":117.3,"p50":169.79,"p80":201.0},{"state":"AL","n":27,"p20":28.0,"p50":63.7,"p80":172.5},{"state":"AR","n":25,"p20":30.68,"p50":39.24,"p80":84.5},{"state":"AZ","n":33,"p20":29.61,"p50":124.0,"p80":156.0},{"state":"CA","n":112,"p20":15.0,"p50":25.0,"p80":50.96},{"state":"CO","n":39,"p20":44.06,"p50":100.47,"p80":211.41},{"state":"CT","n":21,"p20":64.9,"p50":85.8,"p80":143.4},{"state":"DE","n":7,"p20":null,"p50":null,"p80":null},{"state":"FL","n":129,"p20":13.16,"p50":20.8,"p80":53.3},{"state":"GA","n":78,"p20":46.5,"p50":85.02,"p80":156.4},{"state":"HI","n":13,"p20":43.2,"p50":96.64,"p80":137.15},{"state":"IA","n":36,"p20":64.2,"p50":64.28,"p80":100.5},{"state":"ID","n":17,"p20":37.75,"p50":65.1,"p80":91.88},{"state":"IL","n":94,"p20":44.95,"p50":97.0,"p80":218.2},{"state":"IN","n":78,"p20":30.66,"p50":68.0,"p80":151.74},{"state":"KS","n":36,"p20":51.6,"p50":89.1,"p80":226.24},{"state":"KY","n":46,"p20":43.09,"p50":83.4,"p80":216.79},{"state":"LA","n":40,"p20":30.11,"p50":46.48,"p80":70.2},{"state":"MA","n":39,"p20":42.0,"p50":97.0,"p80":173.0},{"state":"MD","n":37,"p20":120.17,"p50":158.71,"p80":192.17},{"state":"ME","n":17,"p20":30.0,"p50":47.55,"p80":137.0},{"state":"MI","n":40,"p20":7.28,"p50":14.84,"p80":77.52},{"state":"MN","n":20,"p20":25.48,"p50":48.93,"p80":109.2},{"state":"MO","n":53,"p20":61.53,"p50":90.0,"p80":209.3},{"state":"MS","n":36,"p20":44.0,"p50":61.74,"p80":136.67},{"state":"MT","n":4,"p20":null,"p50":null,"p80":null},{"state":"NC","n":70,"p20":20.14,"p50":96.34,"p80":159.4},{"state":"ND","n":4,"p20":null,"p50":null,"p80":null},{"state":"NE","n":30,"p20":50.4,"p50":87.0,"p80":141.6},{"state":"NH","n":18,"p20":25.8,"p50":56.4,"p80":154.4},{"state":"NJ","n":54,"p20":17.2,"p50":19.78,"p80":63.19},{"state":"NM","n":19,"p20":55.35,"p50":147.9,"p80":177.87},{"state":"NV","n":14,"p20":25.17,"p50":84.0,"p80":160.48},{"state":"NY","n":85,"p20":20.64,"p50":54.0,"p80":127.5},{"state":"OH","n":102,"p20":52.89,"p50":77.35,"p80":108.0},{"state":"OK","n":51,"p20":37.92,"p50":63.6,"p80":132.55},{"state":"OR","n":34,"p20":36.57,"p50":54.75,"p80":90.82},{"state":"PA","n":116,"p20":28.53,"p50":79.8,"p80":213.0},{"state":"RI","n":6,"p20":null,"p50":null,"p80":null},{"state":"SC","n":45,"p20":54.64,"p50":132.6,"p80":222.0},{"state":"SD","n":6,"p20":null,"p50":null,"p80":null},{"state":"TN","n":63,"p20":22.28,"p50":57.35,"p80":117.84},{"state":"TX","n":190,"p20":53.85,"p50":108.72,"p80":316.74},{"state":"UT","n":37,"p20":65.1,"p50":76.59,"p80":150.98},{"state":"VA","n":57,"p20":19.85,"p50":58.45,"p80":186.5},{"state":"VT","n":2,"p20":null,"p50":null,"p80":null},{"state":"WA","n":49,"p20":46.9,"p50":78.69,"p80":131.3},{"state":"WI","n":62,"p20":61.48,"p50":97.5,"p80":128.05},{"state":"WV","n":17,"p20":51.05,"p50":56.0,"p80":83.0},{"state":"WY","n":11,"p20":40.45,"p50":70.4,"p80":124.95}],"by_segment":{"hospital_type":[{"key":"acute","n":1833,"p20":27.85,"p50":71.85,"p80":152.25},{"key":"childrens","n":44,"p20":25.0,"p50":64.5,"p80":175.9},{"key":"critical_access","n":345,"p20":43.85,"p50":83.0,"p80":158.27}],"ownership":[{"key":"for_profit","n":353,"p20":25.8,"p50":85.2,"p80":278.0},{"key":"government","n":308,"p20":27.95,"p50":60.19,"p80":149.0},{"key":"nonprofit","n":1561,"p20":30.56,"p50":72.36,"p80":143.4}],"affiliation":[{"key":"affiliated","n":1874,"p20":29.61,"p50":72.26,"p80":155.25},{"key":"independent","n":355,"p20":31.8,"p50":73.0,"p80":150.98}]},"histogram":[{"lo":14.49,"hi":19.9,"n":150},{"lo":19.9,"hi":27.33,"n":132},{"lo":27.33,"hi":37.54,"n":182},{"lo":37.54,"hi":51.56,"n":231},{"lo":51.56,"hi":70.81,"n":274},{"lo":70.81,"hi":97.25,"n":307},{"lo":97.25,"hi":133.56,"n":278},{"lo":133.56,"hi":183.43,"n":231},{"lo":183.43,"hi":251.93,"n":159},{"lo":251.93,"hi":346.0,"n":64}],"previous":null},"inpatient":{"setting":"inpatient","computed_at":"2026-09-25T11:55:12.319193Z","corpus_loaded_through":"2026-09-25T01:10:45.071082Z","filing_date_min":"2024-01-01","filing_date_max":"2026-09-22","checked_from":"2026-09-05T02:26:25.308434Z","checked_through":"2026-09-25T01:14:07.150894Z","n_priced_setters":3956,"n_filed":1764,"n_usable":1588,"n_not_usable":0,"n_labelled":102,"n_no_cash":74,"n_estimated":0,"n_states":50,"cash_p10":20.16,"cash_p20":33.8,"cash_p25":40.49,"cash_p50":77.35,"cash_p75":133.72,"cash_p80":154.0,"cash_p90":215.0,"cash_mean_trimmed":81.93,"gross_p50":125.0,"cash_to_gross_p50":0.6,"medicare_rate":null,"medicare_schedule":null,"medicare_year":null,"cash_to_medicare_p50":null,"by_state":[{"state":"AK","n":2,"p20":null,"p50":null,"p80":null},{"state":"AL","n":18,"p20":31.8,"p50":95.97,"p80":250.91},{"state":"AR","n":9,"p20":null,"p50":null,"p80":null},{"state":"AZ","n":28,"p20":29.61,"p50":124.0,"p80":234.0},{"state":"CA","n":94,"p20":15.0,"p50":28.76,"p80":50.96},{"state":"CO","n":30,"p20":44.06,"p50":88.1,"p80":103.1},{"state":"CT","n":10,"p20":26.88,"p50":64.9,"p80":81.0},{"state":"DE","n":6,"p20":null,"p50":null,"p80":null},{"state":"FL","n":74,"p20":12.13,"p50":20.8,"p80":54.18},{"state":"GA","n":64,"p20":46.5,"p50":85.02,"p80":152.25},{"state":"HI","n":8,"p20":null,"p50":null,"p80":null},{"state":"IA","n":25,"p20":64.28,"p50":64.28,"p80":86.1},{"state":"ID","n":11,"p20":37.75,"p50":46.8,"p80":65.1},{"state":"IL","n":77,"p20":60.0,"p50":106.8,"p80":232.8},{"state":"IN","n":54,"p20":50.35,"p50":73.2,"p80":187.56},{"state":"KS","n":10,"p20":38.67,"p50":60.19,"p80":350.35},{"state":"KY","n":29,"p20":38.1,"p50":51.6,"p80":115.8},{"state":"LA","n":22,"p20":28.56,"p50":41.28,"p80":115.92},{"state":"MA","n":36,"p20":42.0,"p50":91.0,"p80":146.3},{"state":"MD","n":29,"p20":107.02,"p50":149.94,"p80":195.8},{"state":"ME","n":14,"p20":29.92,"p50":36.75,"p80":148.8},{"state":"MI","n":28,"p20":7.28,"p50":12.8,"p80":94.9},{"state":"MN","n":18,"p20":32.76,"p50":48.93,"p80":109.2},{"state":"MO","n":25,"p20":79.8,"p50":108.99,"p80":182.6},{"state":"MS","n":29,"p20":55.91,"p50":108.42,"p80":175.45},{"state":"MT","n":2,"p20":null,"p50":null,"p80":null},{"state":"NC","n":42,"p20":17.92,"p50":43.0,"p80":159.4},{"state":"ND","n":3,"p20":null,"p50":null,"p80":null},{"state":"NE","n":17,"p20":80.51,"p50":86.1,"p80":183.6},{"state":"NH","n":12,"p20":25.8,"p50":34.1,"p80":86.18},{"state":"NJ","n":24,"p20":19.78,"p50":19.78,"p80":176.4},{"state":"NM","n":14,"p20":75.6,"p50":145.5,"p80":149.8},{"state":"NV","n":8,"p20":null,"p50":null,"p80":null},{"state":"NY","n":50,"p20":42.0,"p50":74.0,"p80":163.0},{"state":"OH","n":91,"p20":54.46,"p50":77.35,"p80":108.0},{"state":"OK","n":38,"p20":24.4,"p50":51.1,"p80":134.1},{"state":"OR","n":21,"p20":52.33,"p50":68.01,"p80":90.82},{"state":"PA","n":104,"p20":46.4,"p50":103.2,"p80":215.15},{"state":"RI","n":3,"p20":null,"p50":null,"p80":null},{"state":"SC","n":34,"p20":104.4,"p50":132.6,"p80":240.6},{"state":"SD","n":4,"p20":null,"p50":null,"p80":null},{"state":"TN","n":53,"p20":20.71,"p50":52.58,"p80":117.84},{"state":"TX","n":148,"p20":48.33,"p50":96.0,"p80":175.5},{"state":"UT","n":25,"p20":65.1,"p50":72.36,"p80":76.59},{"state":"VA","n":43,"p20":7.5,"p50":52.5,"p80":186.0},{"state":"VT","n":2,"p20":null,"p50":null,"p80":null},{"state":"WA","n":41,"p20":46.9,"p50":76.0,"p80":134.68},{"state":"WI","n":49,"p20":89.76,"p50":97.5,"p80":128.05},{"state":"WV","n":3,"p20":null,"p50":null,"p80":null},{"state":"WY","n":7,"p20":null,"p50":null,"p80":null}],"by_segment":{"hospital_type":[{"key":"acute","n":1326,"p20":30.15,"p50":76.59,"p80":149.05},{"key":"childrens","n":35,"p20":28.0,"p50":74.9,"p80":175.9},{"key":"critical_access","n":220,"p20":39.78,"p50":83.0,"p80":163.79}],"ownership":[{"key":"for_profit","n":197,"p20":28.76,"p50":85.02,"p80":187.56},{"key":"government","n":186,"p20":27.85,"p50":63.5,"p80":158.2},{"key":"nonprofit","n":1198,"p20":34.65,"p50":77.35,"p80":148.76}],"affiliation":[{"key":"affiliated","n":1372,"p20":34.35,"p50":77.35,"p80":155.25},{"key":"independent","n":216,"p20":30.2,"p50":72.15,"p80":146.3}]},"histogram":[{"lo":14.5,"hi":19.67,"n":51},{"lo":19.67,"hi":26.67,"n":119},{"lo":26.67,"hi":36.18,"n":109},{"lo":36.18,"hi":49.07,"n":143},{"lo":49.07,"hi":66.55,"n":200},{"lo":66.55,"hi":90.27,"n":224},{"lo":90.27,"hi":122.43,"n":196},{"lo":122.43,"hi":166.06,"n":187},{"lo":166.06,"hi":225.23,"n":144},{"lo":225.23,"hi":305.48,"n":63}],"previous":null}},"related":[{"code_type":"CPT","code":"85610","lay_name":"Prothrombin time blood clotting test","slug":"cpt-85610-prothrombin-time-blood-clotting-test"},{"code_type":"CPT","code":"83735","lay_name":"Magnesium blood test","slug":"cpt-83735-magnesium-blood-test"},{"code_type":"CPT","code":"85730","lay_name":"Partial thromboplastin time clotting test","slug":"cpt-85730-partial-thromboplastin-time-clotting-test"},{"code_type":"CPT","code":"83880","lay_name":"BNP blood test for heart strain","slug":"cpt-83880-bnp-blood-test-for-heart-strain"},{"code_type":"CPT","code":"85018","lay_name":"Hemoglobin blood test","slug":"cpt-85018-hemoglobin-blood-test"},{"code_type":"CPT","code":"83036","lay_name":"Hemoglobin A1c blood test","slug":"cpt-83036-hemoglobin-a1c-blood-test"},{"code_type":"CPT","code":"82565","lay_name":"Creatinine blood test","slug":"cpt-82565-creatinine-blood-test"},{"code_type":"CPT","code":"83605","lay_name":"Blood test for lactic acid (lactate)","slug":"cpt-83605-blood-test-for-lactic-acid-lactate"},{"code_type":"CPT","code":"84484","lay_name":"Troponin blood test with a measured result","slug":"cpt-84484-troponin-blood-test-with-a-measured-result"},{"code_type":"CPT","code":"82306","lay_name":"Vitamin D blood test (25-hydroxy)","slug":"cpt-82306-vitamin-d-blood-test-25-hydroxy"},{"code_type":"CPT","code":"80048","lay_name":"Basic metabolic blood panel","slug":"cpt-80048-basic-metabolic-blood-panel"},{"code_type":"CPT","code":"84132","lay_name":"Potassium blood test","slug":"cpt-84132-potassium-blood-test"}]}