Patient presents with complaints consistent with right renal calculus.  Symptoms include right flank pain, described as sharp and intermittent, radiating to the groin.  The patient also reports hematuria and nausea.  Onset of symptoms began approximately 48 hours prior to presentation.  Physical examination reveals costovertebral angle tenderness on the right side.  Urinalysis demonstrates microscopic hematuria.  Differential diagnosis includes nephrolithiasis, pyelonephritis, renal colic, and ureteral obstruction.  A non-contrast CT scan of the abdomen and pelvis was ordered to confirm the diagnosis of right kidney stone and assess stone size and location.  Preliminary impression is right renal calculus.  Plan includes pain management with analgesics, hydration encouragement, and follow-up to discuss management options based on CT scan results.  Medical coding will be determined based on confirmed diagnosis and procedures performed.  Keywords: renal colic, kidney stone, nephrolithiasis, right flank pain, hematuria, ureteral stone, CT scan, abdominal pain, medical billing, coding, ICD-10, CPT codes, EHR documentation, healthcare, clinical documentation.