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- Lactate Test
- Lactic Acid
- Lactic Acid Dehydrogenase (LDH) -- Cardiac Enzyme Studies
- Lactic acid dehydrogenase (LDH) -- Lactic acid dehydrogenase (LDH)
- Lactogenic Hormone Level
- Laparoscopic gallbladder surgery for gallstones
- Laparoscopic inguinal hernia repair
- Laparoscopic lymphadenectomy for prostate cancer
- Laparoscopic ovarian drilling (ovarian diathermy) for PCOS
- Laparoscopic surgery for endometriosis
- Laparoscopy
- Laryngoscopy
- Laser in-situ keratomileusis (LASIK) for nearsightedness
- Laser in-situ keratomileusis for farsightedness (H-LASIK)
- Laser iridotomy for glaucoma
- Laser photocoagulation for age-related macular degeneration
- Laser resurfacing
- Laser surgery for abnormal cervical cell changes
- Laser surgery for genital warts
- Laser surgery for warts
- Laser trabeculoplasty for glaucoma
- LDH-1 (Lactate Dehydrogenase Isoenzymes) Test
- LDL Cholesterol Test
- Leg X-Ray
- LH (Leutinizing Hormone) Test
- Lipase
- Lipid Profile
- Lipoprotein Analysis
- Liver and Spleen Scan
- Liver Biopsy
- Liver resection
- Liver tests for hepatitis C
- Liver tests for infectious mononucleosis
- Loop electrosurgical excision procedure (LEEP) for abnormal cervical cell changes
- Loop electrosurgical excision procedure (LEEP) for genital warts
- Lower Gastrointestinal Series
- Lumbar Puncture
- Lung Angiogram
- Lung Biopsy
- Lung Function Testing, Home
- Lung Function Tests
- Lung Scan
- Lung surgery (thoracotomy) for lung cancer
- Lung transplantation for cystic fibrosis
- Luteinizing Hormone (LH) Level
- Lyme Disease Test
- Lymph Node Biopsy
- Lymph node removal (lymphadenectomy) for melanoma
- Lymphadenectomy for endometrial cancer
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