Automating Document Processing with OCR & LLM Integration

Challenge / Problem Statement
- Manual data entry from physical documents was error-prone and labor-intensive.
- High volumes of invoices and claims came in unstructured, inconsistent formats. Timely and accurate extraction was critical for patient care, claims processing, and compliance.
- Lack of standardized document formats created automation complexity.
Objectives
- Automate extraction of key data from diverse documents..
- Standardize outputs for seamless backend integration.
- Reduce claim processing time and manual overhead.
- Improve accuracy and consistency in healthcare and insurance workflows.
Process & Implementation
- Built endpoints in FastAPI with schema validation (Pydantic).
- Integrated Tesseract OCR & EasyOCR for text extraction.
- Used spaCy + regex for entity recognition and structured parsing.
- Applied PDFPlumber & Pillow for preprocessing scanned PDFs and invoices.
- Designed integration-ready outputs for claim pipelines and dashboards.
Our Solution
We developed a lightweight, scalable Document Extraction API using FastAPI, leveraging OCR and NLP techniques. The solution included four specialized endpoints, each optimized for a specific document type:
Aadhar Card Extractor – Captured name, DOB, address, and Aadhar number via OCR + regex.
PAN Card Extractor – Parsed PAN number, name, and DOB with OCR layers and text-position detection.
Insurance Policy Extractor – Extracted policy number, coverage details, insured name, and premium cycle using NLP for contextual data.
Hospital Invoice Extractor –
Extracted patient info, hospital details, date, cost, and diagnosis, fine-tuned for varied invoice layouts.
The API returned structured JSON outputs, enabling smooth integration with CRMs, claim portals, and EMR systems.
Tools & Tech Used
- Framework: FastAPI
- OCR: Tesseract, EasyOCR
- NLP/Parsing: spaCy, regex
- Preprocessing: PDFPlumber
- Validation: Pydantic
- Integrations: EMR systems
Results & Impact
- 4 production-ready endpoints tailored to document types
- 95%+ accuracy on clean scans and PDFs
- 70% reduction in processing time compared to manual entry
- Standardized JSON outputs for downstream automation
- Improved accuracy in claim validations & medical record updates
Key Takeaways
- OCR + NLP unlock automation in industries with complex, document-heavy workflows.
- Standardized APIs accelerate claim verification and compliance in healthcare/insurance.
- MoreYeahs ensures scalable, production-ready integrations for enterprise use cases.
Project Duration & Team
- Duration: 8 weeks
- Team: 1 API Developer, 1 Machine Learning Engineer (OCR/NLP), 1 QA/Test Automation Engineer