Patient presents with complaints of anterior knee pain, consistent with a potential diagnosis of chondromalacia patellae.  The patient reports experiencing symptoms such as patellofemoral pain syndrome, characterized by a dull, aching pain in the front of the knee, exacerbated by activities like stair climbing, prolonged sitting, squatting, and running.  The onset of pain is described as gradual, with no specific injury reported.  Physical examination reveals tenderness on palpation of the patella and crepitus with range of motion.  Positive patellar grind test and Clarke's sign further suggest patellofemoral joint involvement.  No signs of effusion or instability were noted.  Differential diagnosis includes patellar tendinitis, prepatellar bursitis, and osteoarthritis of the knee.  Assessment points toward chondromalacia patella, likely grade I-II based on presenting symptoms and examination findings.  Initial treatment plan includes conservative management with NSAIDs for pain relief, physical therapy focused on strengthening quadriceps and improving patellar tracking, and activity modification.  Patient education provided regarding avoiding aggravating activities and proper knee mechanics.  Follow-up scheduled in 4 weeks to assess response to treatment.  ICD-10 code I73.9 for cartilage disorders, unspecified, and CPT codes for evaluation and management (e.g., 99202-99215 depending on complexity) and physical therapy (e.g., 97110) will be used for billing purposes.  If symptoms persist or worsen, further investigations such as MRI of the knee may be considered.  Medical necessity for ongoing treatment will be documented.