Here's the short answer. CMS updates come from several official sources — CMS.gov's newsroom, the Federal Register, Medicaid.gov, and your state Medicaid agency — depending on what kind of update you need. Use the Federal Register for exact rule text, CMS manuals or HPMS memos for day-to-day guidance, and Medicaid.gov or your state site for Medicaid-specific policy.
CMS Updates: The Quick Answer
"CMS updates" can mean several different things. Here is what each one is and where to find it:
- News and announcements: press releases and fact sheets about new rules, payment changes, and enforcement actions. Find them in the CMS.gov newsroom, which lists press releases by date. You can sign up there for email updates.
- Proposed and final rules: the legally binding regulations. These are published in the Federal Register, where you can search by agency and set up alerts.
- Manuals and memos: the detailed instructions that explain how to follow a rule day to day. CMS manuals are public on CMS.gov. HPMS memos go to Medicare Advantage and Part D plans.
- Medicaid guidance: State Medicaid Director letters and federal Medicaid policy on Medicaid.gov, plus each state's own bulletins on its state Medicaid agency site.
- Yearly numbers and plan ratings: each spring CMS releases a Rate Announcement with the financial changes and new policies for the coming year. Each fall it publishes new plan Star Ratings on Medicare.gov ahead of Open Enrollment (October 15 through December 7). See Medicare Star Ratings.
Want the plain-language version?
If you are a member or caregiver and just want to know what changed and what it means for you, skip the legal documents. MediPrimer's Policy & Rule Changes page explains the significant recent changes in plain language and what each one means for the people it touches. The rest of this page is for people who need to track the official sources themselves.
Which source should I check first?
- "Did CMS announce something this week?" The CMS.gov newsroom.
- "What does the rule actually say?" The Federal Register.
- "How do I apply this rule in my plan or office?" The CMS manuals, or HPMS memos if you work for a plan.
- "Does this apply to Medicaid in my state?" Medicaid.gov first, then your state agency's bulletins.
Why This Matters
Medicare and Medicaid work under a system of federal laws, detailed rules, and official guidance. If you work in health insurance, benefits, enrollment, or member services, you need to understand this system and stay on top of updates.
Rules change often. New regulations take effect. Guidance gets clarified. State Medicaid policies evolve. This page explains how these programs are governed and points you to the official sources where you can verify any specific requirement.
Who Governs What
Medicare: CMS (the Centers for Medicare & Medicaid Services), a federal agency, runs Medicare. CMS writes the detailed rules that apply the same way everywhere in the country. Congress passes the main laws; CMS then creates the specific rules and instructions you follow.
Medicaid: Medicaid is governed by both CMS and the states working together. CMS sets the federal requirements and basic rules — states must follow these. But each state runs its own Medicaid program and makes its own choices about eligibility, benefits (what's covered), and provider pay rates.
This means Medicaid works differently in each state. If you work with Medicaid members, you need to follow both the federal rules from CMS and the rules specific to your state.
The Rulemaking Cycle
Understanding the lifecycle of a rule helps you anticipate and find updates:
- Statute: Congress passes a law that creates or changes a program requirement. The law is official, but it often leaves details for the agency to fill in.
- Proposed Rule: CMS writes a proposed rule that explains how the law will work in practice. It's published in the Federal Register, and the public gets 30–60 days to comment. Anyone can submit their thoughts.
- Final Rule: CMS reviews the comments and publishes the Final Rule in the Federal Register. The Final Rule explains what CMS decided based on the comments and when the rule goes into effect. Most rules take effect 30–60 days after they're published.
- Sub-regulatory Guidance: After a rule is final, CMS publishes more detailed guidance in the form of manuals, memos, FAQs (frequently asked questions), or system instructions. This guidance explains how to follow the rule every day but doesn't change the rule itself.
Some Medicare updates follow the same schedule every year. For example, CMS typically releases a Rate Announcement and Call Letter each spring that announce financial changes and new policies for the coming year. These are followed by detailed rules and guidance.
State Medicaid updates follow different timelines. Some follow the federal calendar, while others align with the state's fiscal year or legislative sessions.
Types of Guidance You'll Encounter
When you track updates, you'll see different types of documents from CMS and the states:
- Federal Register Notices: Proposed and final rules, notices about information being collected, and other formal documents. This is the official legal record.
- CMS Manuals: Detailed guidance for specific programs — for example, the Medicare Managed Care Manual, the Prescription Drug Benefit Manual, and the State Medicaid Manual. These are updated with change notices that explain what's new or different.
- Health Plan Management System (HPMS) Memos: Electronic messages from CMS to health plans in Medicare Advantage and Part D programs. These share policy updates, deadlines, and system changes.
- State Medicaid Director (SMD) Letters: Letters from CMS's State Medicaid office to state agencies. They explain federal Medicaid policy, answer common questions, and provide guidance.
- State-Specific Bulletins and Notices: Each state Medicaid agency shares its own bulletins, member notices, and policies. These put federal rules into practice and add state-specific rules.
How to Track Updates Reliably
To stay current, you need to check several sources. Here are the official places to look:
- CMS.gov: The official CMS website has a newsroom, regulations, and program information. You can sign up for email updates or check the newsroom often for new announcements.
- Federal Register (federalregister.gov): All federal rules are published here. You can search by agency (CMS) or browse the Health and Human Services section. You can set up email alerts for topics you care about.
- Medicaid.gov: CMS's federal Medicaid section. This site publishes State Medicaid Director letters, federal policy guidance, and updates that apply to all states.
- HealthCare.gov: Useful for tracking updates related to the Health Insurance Marketplace (ACA), which works with Medicaid in some states.
- State Medicaid Agency Websites: Each state publishes its own Medicaid policy, provider manuals, and guidance. Visit MediPrimer's State Medicaid Directory to find your state's agency and resources.
Key Sources at a Glance
| Source | What It Publishes | Who It Applies To |
|---|---|---|
| Federal Register | Proposed and final rules, notices | Everyone; required reading for legal requirements |
| CMS.gov Newsroom | Announcements, summaries, fact sheets | Everyone (CMS summarizes Federal Register rules) |
| Medicare Managed Care Manual and other CMS Manuals | Detailed operational guidance and procedures | Health plans, providers, and CMS staff; also public |
| HPMS Memos | Deadline notices, policy clarifications, system instructions | Medicare Advantage and Part D health plans |
| Medicaid.gov (Federal Policy Section) | State Medicaid Director letters, federal Medicaid guidance | State Medicaid agencies; also open to the public |
| State Medicaid Agency Websites | Provider bulletins, member notices, state policy documents | Providers, members, and public in that state |
Important Note
This page explains how programs are governed, but it doesn't cover specific current rules or policy changes. Medicare and Medicaid rules change often, and any summary can become outdated fast.
Always verify any rule or requirement by checking the official sources listed above. Look at the Federal Register for the exact legal text, or call CMS or your state Medicaid agency if you need help understanding a rule.