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Contact CMS

Contact CMS


This page provides a list of contact phone numbers and web links to help you find answers to your Medicare questions or program issues. Information in this page cannot respond to individual Medicare concerns.

Questions related to specific services (e.g. casework, program issues, etc.) should be communicated through the existing Centers for Medicare & Medicaid Services' resources, identified below. Additional information and assistance can be found at the Medicare.gov website or under the "Related Links Inside CMS" section found below.

Contact Information for People with Medicare

Telephone numbers and web link information related to specific Medicare questions.

  • Medicare Service Center: 800-MEDICARE (800-633-4227) 
  • Medicare Service Center TTY: 877-486-2048
  • Report Medicare Fraud & Abuse: 800-HHS-TIPS (1-800-447-8477)
  • See "Related Links Inside CMS" below

Contact Information for People with Medicaid

Medicaid is a state administered program and each state sets its own guidelines regarding eligibility and services. Please refer to the  "Related Links Inside CMS" for a list of State Health Departments.

Contact Information for National Provider Identifier Standard (NPI)

  • NPI Enumerator: 800-465-3203
  • NPI Enumerator TTY: 800-692-2326
  • See "Related Links Inside CMS" below

Contact Information for Unique Physician Identification (UPIN)

  • See "Related Links Outside CMS" below

Contact Information for Social Security, Disability Issues, or Supplemental Security Income

  • Social Security: 800-772-1213
  • See "Related Links Outside CMS" below

Contact information for CMS Regional Office

Provides contact information for your CMS Regional Office, and specific program issue contacts are also available as PDF download.

  • See "Related Links Inside CMS" below

CMS Baltimore Headquarters Telephone Numbers

  • Toll-Free: 877-267-2323 (Employee directory available) 
  • Local: 410-786-3000
  • TTY Toll-Free: 866-226-1819
  • TTY Local: 410-786-0727 


There are no Downloads
Related Links Inside CMS
Medicare.gov - Central Site for Medicare Information

MyMedicare - Access to Your Personal Medicare Information

Medicare.gov - Helpful Contacts Page

Medicare Fraud & Abuse

Medicaid - List of State Health Departments

National Plan and Provider Enumeration System (NPPES)

National Provider Identifier Standard (NPI)

Clinical Laboratory Improvement Amendments (CLIA)

Contact Directory Database

Regional Office Contact Information

Media and Press Contacts
Related Links Outside CMS
HHS Employee Directory

Unique Physician Identification (UPIN) Registry

Social Security


Page Last Modified: 04/30/2008 8:41:25 AM
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