Patient presents with complaints consistent with possible psoas abscess.  Presenting symptoms include fever, flank pain, back pain, hip pain, abdominal pain, and limp.  Patient reports [duration of symptoms].  Pain is described as [character of pain: e.g., dull, aching, sharp, throbbing] and located in the [specific location of pain].  Patient denies [relevant negatives, e.g., trauma, recent infection].  Physical examination reveals [positive findings, e.g., tenderness to palpation in the flank, hip flexion contracture, positive psoas sign].  Differential diagnosis includes appendicitis, pyelonephritis, diverticulitis, osteomyelitis, and septic arthritis.  Ordered complete blood count (CBC) with differential, erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), urinalysis, and blood cultures.  Imaging studies including computed tomography (CT) scan of the abdomen and pelvis with intravenous contrast are planned to evaluate for psoas muscle abscess.  Preliminary diagnosis of psoas abscess is suspected.  Patient will be admitted for further evaluation and management, including possible percutaneous drainage or surgical intervention.  Treatment plan will be determined based on imaging results and patient's clinical response.  ICD-10 code M60.01 (primary) will be utilized, with additional codes added as necessary based on confirmed diagnosis and procedures performed.  CPT codes for procedures will be documented upon completion.