Enterprise healthcare management system featuring HIPAA compliance, real-time patient monitoring, secure medical records management, and automated workflow processing. Built with .NET Core, SQL Server, and Azure cloud services for mission-critical healthcare operations.
HIPAA-compliant infrastructure with enterprise security and scalability
High-performance ASP.NET Core Web APIs with Entity Framework, providing secure, scalable healthcare data management with advanced caching and optimization.
Complete HIPAA compliance with encrypted data storage, audit trails, access controls, and privacy safeguards protecting sensitive patient health information.
Comprehensive patient records management with medical history, treatment plans, medication tracking, and real-time health monitoring capabilities.
Advanced scheduling system with provider availability, patient preferences, automated reminders, and integration with calendar systems.
Automated healthcare workflows for treatment protocols, medication management, lab results processing, and clinical decision support systems.
Advanced analytics and reporting for population health management, treatment outcomes, and operational efficiency optimization.
Enterprise .NET patterns and healthcare compliance architecture
[ApiController]
[Route("api/[controller]")]
[Authorize(Policy = "HealthcareProvider")]
public class PatientController : ControllerBase
{
private readonly IPatientService _patientService;
private readonly ILogger<PatientController> _logger;
private readonly IAuditService _auditService;
public PatientController(
IPatientService patientService,
ILogger<PatientController> logger,
IAuditService auditService)
{
_patientService = patientService;
_logger = logger;
_auditService = auditService;
}
[HttpGet("{patientId}")]
[RequireScope("patient.read")]
public async Task<ActionResult<PatientDto>> GetPatient(Guid patientId)
{
try
{
// Verify provider has access to this patient
var currentUser = User.Identity.Name;
if (!await _patientService.HasPatientAccessAsync(currentUser, patientId))
{
await _auditService.LogUnauthorizedAccessAsync(
currentUser, "Patient", patientId, "Read");
return Forbid("Access denied to patient record");
}
var patient = await _patientService.GetPatientAsync(patientId);
if (patient == null)
return NotFound();
// Log HIPAA audit trail
await _auditService.LogDataAccessAsync(
currentUser, "Patient", patientId, "Read",
HttpContext.Connection.RemoteIpAddress?.ToString());
return Ok(patient);
}
catch (Exception ex)
{
_logger.LogError(ex, "Error retrieving patient {PatientId}", patientId);
return StatusCode(500, "Internal server error");
}
}
[HttpPost]
[RequireScope("patient.write")]
public async Task<ActionResult<PatientDto>> CreatePatient(CreatePatientRequest request)
{
if (!ModelState.IsValid)
return BadRequest(ModelState);
try
{
// Validate provider permissions
var currentUser = User.Identity.Name;
if (!await _patientService.CanCreatePatientAsync(currentUser))
{
return Forbid("Insufficient permissions to create patient");
}
// Create patient with encryption
var patient = await _patientService.CreatePatientAsync(request, currentUser);
// HIPAA audit logging
await _auditService.LogDataCreationAsync(
currentUser, "Patient", patient.Id,
request.GetSensitiveDataFields());
return CreatedAtAction(
nameof(GetPatient),
new { patientId = patient.Id },
patient);
}
catch (ValidationException ex)
{
return BadRequest(ex.Message);
}
catch (Exception ex)
{
_logger.LogError(ex, "Error creating patient");
return StatusCode(500, "Internal server error");
}
}
}
public class PatientService : IPatientService
{
private readonly ApplicationDbContext _context;
private readonly IEncryptionService _encryptionService;
private readonly IMemoryCache _cache;
public PatientService(
ApplicationDbContext context,
IEncryptionService encryptionService,
IMemoryCache cache)
{
_context = context;
_encryptionService = encryptionService;
_cache = cache;
}
public async Task<PatientDto> GetPatientAsync(Guid patientId)
{
// Check cache first (with expiration for sensitive data)
var cacheKey = $"patient_{patientId}";
if (_cache.TryGetValue(cacheKey, out PatientDto cachedPatient))
{
return cachedPatient;
}
// Query database with encrypted data handling
var patient = await _context.Patients
.Include(p => p.MedicalHistory)
.Include(p => p.Appointments)
.Include(p => p.Medications)
.FirstOrDefaultAsync(p => p.Id == patientId);
if (patient == null)
return null;
// Decrypt sensitive fields
var patientDto = new PatientDto
{
Id = patient.Id,
FirstName = await _encryptionService.DecryptAsync(patient.EncryptedFirstName),
LastName = await _encryptionService.DecryptAsync(patient.EncryptedLastName),
DateOfBirth = patient.DateOfBirth,
SocialSecurityNumber = await _encryptionService.DecryptAsync(patient.EncryptedSSN),
MedicalRecordNumber = patient.MedicalRecordNumber,
ContactInfo = await DecryptContactInfoAsync(patient.EncryptedContactInfo),
MedicalHistory = patient.MedicalHistory.Select(h => new MedicalHistoryDto
{
Id = h.Id,
Condition = h.Condition,
DiagnosisDate = h.DiagnosisDate,
TreatmentPlan = h.TreatmentPlan,
Notes = h.Notes
}).ToList()
};
// Cache for 5 minutes only (sensitive data)
_cache.Set(cacheKey, patientDto, TimeSpan.FromMinutes(5));
return patientDto;
}
public async Task<bool> HasPatientAccessAsync(string providerId, Guid patientId)
{
// Check provider-patient relationship
return await _context.ProviderPatientAccess
.AnyAsync(ppa => ppa.ProviderId == providerId
&& ppa.PatientId == patientId
&& ppa.IsActive
&& ppa.ExpiresAt > DateTime.UtcNow);
}
}public class AuditService : IAuditService
{
private readonly ApplicationDbContext _context;
private readonly IConfiguration _configuration;
private readonly ILogger<AuditService> _logger;
public AuditService(
ApplicationDbContext context,
IConfiguration configuration,
ILogger<AuditService> logger)
{
_context = context;
_configuration = configuration;
_logger = logger;
}
public async Task LogDataAccessAsync(
string userId,
string resourceType,
Guid resourceId,
string action,
string ipAddress = null)
{
try
{
var auditLog = new AuditLog
{
Id = Guid.NewGuid(),
UserId = userId,
ResourceType = resourceType,
ResourceId = resourceId,
Action = action,
Timestamp = DateTime.UtcNow,
IpAddress = ipAddress,
UserAgent = GetUserAgent(),
SessionId = GetSessionId(),
ComplianceLevel = "HIPAA",
TenantId = GetTenantId(),
Severity = GetActionSeverity(action)
};
_context.AuditLogs.Add(auditLog);
await _context.SaveChangesAsync();
// Send to compliance monitoring system
await SendToComplianceMonitoringAsync(auditLog);
// Check for suspicious patterns
await DetectSuspiciousActivityAsync(userId, resourceType, action);
}
catch (Exception ex)
{
// Critical: Audit logging must not fail
_logger.LogCritical(ex,
"CRITICAL: Audit logging failed for user {UserId} accessing {ResourceType} {ResourceId}",
userId, resourceType, resourceId);
// Failsafe: Log to secondary system
await LogToSecondaryAuditSystemAsync(userId, resourceType, resourceId, action, ex);
}
}
public async Task LogUnauthorizedAccessAsync(
string userId,
string resourceType,
Guid resourceId,
string attemptedAction)
{
var unauthorizedAccess = new UnauthorizedAccessLog
{
Id = Guid.NewGuid(),
UserId = userId,
ResourceType = resourceType,
ResourceId = resourceId,
AttemptedAction = attemptedAction,
Timestamp = DateTime.UtcNow,
IpAddress = GetIpAddress(),
UserAgent = GetUserAgent(),
RiskLevel = "HIGH",
AutoBlocked = ShouldAutoBlock(userId),
ComplianceAlert = true
};
_context.UnauthorizedAccessLogs.Add(unauthorizedAccess);
await _context.SaveChangesAsync();
// Immediate security response
await TriggerSecurityResponseAsync(unauthorizedAccess);
// Notify compliance officer
await NotifyComplianceOfficerAsync(unauthorizedAccess);
}
private async Task DetectSuspiciousActivityAsync(
string userId,
string resourceType,
string action)
{
var recentAccess = await _context.AuditLogs
.Where(al => al.UserId == userId
&& al.Timestamp > DateTime.UtcNow.AddMinutes(-10))
.CountAsync();
// Alert if more than 50 records accessed in 10 minutes
if (recentAccess > 50)
{
await TriggerSuspiciousActivityAlertAsync(userId, recentAccess);
}
// Check for after-hours access
var currentHour = DateTime.Now.Hour;
if (currentHour < 6 || currentHour > 22)
{
await LogAfterHoursAccessAsync(userId, resourceType, action);
}
}
public async Task<ComplianceReport> GenerateComplianceReportAsync(
DateTime startDate,
DateTime endDate)
{
var auditLogs = await _context.AuditLogs
.Where(al => al.Timestamp >= startDate && al.Timestamp <= endDate)
.ToListAsync();
return new ComplianceReport
{
ReportPeriod = $"{startDate:yyyy-MM-dd} to {endDate:yyyy-MM-dd}",
TotalDataAccess = auditLogs.Count,
UniqueUsers = auditLogs.Select(al => al.UserId).Distinct().Count(),
UnauthorizedAttempts = await _context.UnauthorizedAccessLogs
.CountAsync(ual => ual.Timestamp >= startDate && ual.Timestamp <= endDate),
ComplianceScore = CalculateComplianceScore(auditLogs),
SecurityIncidents = await GetSecurityIncidentsAsync(startDate, endDate),
DataBreachAnalysis = await AnalyzeDataBreachRiskAsync(auditLogs),
RecommendedActions = await GenerateComplianceRecommendationsAsync(auditLogs)
};
}
}Meeting healthcare regulatory requirements with enterprise security
Transforming patient care through secure technology
Interested in developing HIPAA-compliant healthcare systems? Let's discuss how these .NET enterprise patterns can transform your healthcare technology infrastructure.