Contact Us


Discover excellence in customer service.

General information on
medical billing and sales:
866-888-2189 or 516-883-7100
gsiano@nationalmms.com

Client service:
8AM to 5:30PM Eastern Time
Monday through Friday
Email: service@nationalmms.com

Office Location:
26 Harbor Park Drive
Port Washington, NY 11050
Fax: 516-883-7474

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360 RCM
Back Office Services
Medical Billing
and Collections
Credentialing and
Enrollment
Superbill and
Fee Schedule
Reporting and
Benchmarking
Accounts Receivable
Management
Coding and
Compliance
Technology

Seamless front to back office integration.

  • On demand delivery
  • Patient registration and scheduling
  • Real-time reporting
Front Office Solutions
  • Electronic data capture
  • Electronic claims and patient statements
  • Key indicator reporting and review
Back Office Advantages