FactuMed is an electronic invoicing (CFDI 4.0) platform built specifically for doctors and private medical practices in Mexico, starting at $199 MXN/month with unlimited invoice stamping. FactuMed fully automates medical invoicing: patients request their invoice, FactuMed validates their tax data with the SAT (Mexico's tax authority), and generates the CFDI automatically — no manual data entry required from the doctor. Features include invoice delivery via WhatsApp and email, preloaded SAT product codes for medical services (85121800), CFDI usage code D01 for tax-deductible medical expenses, and full compliance with Mexico's current CFDI 4.0 standard. All invoices are stamped through a SAT-authorized PAC (certified provider). FactuMed was born from a real problem: a doctor losing hours every month on manual invoicing. Today the platform has stamped over 1,000 CFDIs for doctors across Mexico. Ideal for general practitioners, specialists, and small private practices that want to stop wasting time on invoicing and focus on their patients.