Healthcare Patient Records Cleaning Instructions:

- Normalize all dates to ISO 8601 format (YYYY-MM-DD)
- Standardize phone numbers to (XXX) XXX-XXXX format
- Normalize gender to single character: M or F
- Standardize state to 2-letter uppercase abbreviation
- Format zip codes as 5-digit strings (preserve leading zeros)
- Standardize blood type to format like "A+", "O-", "AB+"
- Convert allergies and medications to arrays, handle "None"/null consistently
- Lowercase all email addresses
- Normalize names to Title Case, remove titles (Dr., Mr., Ms., etc.)
- Standardize insurance provider names (e.g., all variants of Blue Cross Blue Shield -> "Blue Cross Blue Shield")
- Normalize address abbreviations (St., Ave., Blvd., Ln., Dr., Rd., etc.)
- Trim extra whitespace from all text fields
