CMS 1490S Form: A Step-by-Step Guide to Filing for Medicare Reimbursement

Table of Contents#

1. What Is the CMS 1490S Form?
2. When Do You Need to File the CMS 1490S?
3. Preparing to File: Documents and Information You’ll Need
4. Step-by-Step Guide to Completing the CMS 1490S Form
5. Submitting Your CMS 1490S Form
6. Tracking Your Reimbursement Status
7. Common Mistakes to Avoid
8. Frequently Asked Questions (FAQs)
9. References

---

1. What Is the CMS 1490S Form?#

The CMS 1490S is a standardized form used by Medicare beneficiaries to request reimbursement for eligible medical expenses they paid out of pocket. Unlike provider-submitted claims, this form is filled out by patients (or their authorized representatives) when:

• The provider doesn’t bill Medicare directly.
• The provider doesn’t accept Medicare assignment (meaning they charge more than Medicare’s approved amount).

It’s important to note that this form is only for Original Medicare (Parts A and B). If you have a Medicare Advantage Plan (Part C), you’ll need to follow your plan’s specific reimbursement process, as they may have their own forms.

---

2. When Do You Need to File the CMS 1490S?#

You should file the CMS 1490S form in these common scenarios:

• Provider doesn’t accept Medicare assignment: Some doctors, specialists, or clinics opt out of Medicare assignment, so they won’t bill Medicare directly. You’ll pay upfront and then submit the form for reimbursement.
• Emergency care out of network: If you receive emergency treatment from an out-of-network provider who doesn’t bill Medicare, you’ll need to file a claim yourself.
• Provider fails to bill Medicare: If your provider accepts assignment but doesn’t submit a claim to Medicare within the required timeframe, you can file the form on your own.
• Services not covered by your plan initially: If Medicare denies coverage for a service but you believe it’s medically necessary, you can submit the form with supporting documentation. Note that if the claim is denied, you would need to file a separate appeal using the appropriate form (such as CMS-20027).

---

3. Preparing to File: Documents and Information You’ll Need#

Before you start filling out the form, gather these essential documents and details to ensure a smooth process:

• Itemized Medical Bill: Must include:
  • Provider’s full name, address, and National Provider Identifier (NPI) or tax ID.
  • Your name and date of service(s).
  • Detailed description of each service (e.g., "Annual physical exam" or "MRI of left knee").
  • Individual charges for each service.
• Copy of Your Medicare Card: To confirm your eligibility and 11-character Medicare ID number.
• Proof of Payment: Receipts, canceled checks, credit card statements, or bank records showing how much you paid and when.
• Medicare Explanation of Benefits (EOB): If Medicare already processed a claim for the same service, include this to avoid duplicate requests.
• Supporting Documentation: Referral notes, lab results, or doctor’s orders that prove the service was medically necessary (critical if you’re appealing a denial).

---

4. Step-by-Step Guide to Completing the CMS 1490S Form#

The CMS 1490S form has five main sections. Below is a detailed breakdown of each part:

Part 1: Patient Information#

Fill in your personal details exactly as they appear on your Medicare card:

• Line 1: Full legal name (first, middle, last).
• Line 2: 11-character Medicare ID number (no spaces or hyphens).
• Line 3: Street address, city, state, and ZIP code.
• Line 4: Date of birth (format: MM/DD/YYYY).
• Line 5: Phone number (optional but helpful for follow-up).
• Line 6: Medicare Part A and Part B effective dates (found on your Medicare card).

Part 2: Provider Information#

Enter details for the provider who rendered the service:

• Line 7: Provider’s full name, address, city, state, and ZIP code.
• Line 8: Provider’s NPI (preferred) or tax ID number.
• Line 9: Check the box if you’re filing for multiple providers, then attach a separate sheet with each provider’s details.

Part 3: Claim Details#

List each service you’re requesting reimbursement for:

• Line 10: Date of service (MM/DD/YYYY) – use a separate line for each service date.
• Line 11: Description of service (be specific; include CPT codes if available).
• Line 12: Total charge for the service.
• Line 13: Amount you paid out of pocket for the service.
• Line 14: Sum all amounts from Line 13 to get the total reimbursement request.
• Tip: If you have more than 6 services, attach an additional sheet with the same columns.

Part 4: Certification and Signature#

This section confirms you’re authorized to file the claim:

• Line 15: Check the box indicating you’re the patient or an authorized representative (e.g., spouse, legal guardian).
• Line 16: Sign and date the form. If you’re a representative, include your relationship to the patient.
• Critical note: Unsigned forms will be rejected immediately.

Part 5: Authorization to Disclose Information#

This allows Medicare to contact your provider to verify services and charges:

• Check the box to grant permission.
• Sign and date the form. Without this authorization, Medicare may not process your claim.

---

5. Submitting Your CMS 1490S Form#

You can submit the form via mail or online (depending on your local Medicare Administrative Contractor, or MAC):

• Mail: Send the completed form and all supporting documents to your local MAC. To find your MAC’s address, visit the CMS MAC Listing page and select your state.
• Online: Some MACs offer online submission portals. Check your MAC’s website to see if this option is available for patient-submitted claims.
• Pro Tip: Always make copies of the form and all supporting documents for your records.

---

6. Tracking Your Reimbursement Status#

After submitting your claim, you can track its progress in three ways:

1. MyMedicare.gov: Log into your account, navigate to "Claims & Appeals," and view real-time status updates.
2. Phone: Call 1-800-MEDICARE (1-800-633-4227) and follow the automated prompts or speak to a representative.
3. EOB: You’ll receive an Explanation of Benefits in the mail once your claim is processed. It will outline whether your claim was approved, denied, or requires additional information.

Processing Time: Most claims take 45–60 days to process. If Medicare needs more information, it may take up to 90 days.

---

7. Common Mistakes to Avoid#

To prevent delays or denials, watch out for these common errors:

• Missing signatures: Both Part 4 and Part 5 require signatures.
• Incorrect Medicare ID: Ensure the number matches exactly what’s on your card (no typos or spaces).
• Incomplete itemized bill: Missing dates, descriptions, or provider IDs will lead to rejection.
• Submitting to the wrong MAC: Using an incorrect address will delay processing.
• Late filing: Medicare requires claims to be submitted within 12 months of the service date. After that, you won’t be eligible for reimbursement.
• Omitting supporting documentation: If the service requires proof of medical necessity, don’t skip including relevant records.

---

8. Frequently Asked Questions (FAQs)#

Q: How long does it take to get reimbursed?#

A: Typically 45–60 days from submission. If additional information is requested, it may take up to 90 days.

Q: Can I file the CMS 1490S if my provider accepts Medicare assignment?#

A: No. If your provider accepts assignment, they will bill Medicare directly, and you’ll only pay your deductible, coinsurance, or copayment.

Q: What if my claim is denied?#

A: You’ll receive an EOB explaining why. You can appeal the decision within 120 days of receiving the denial notice. Follow the instructions on the EOB to start the appeal process.

Q: Can I file the form online?#

A: Some MACs offer online submission options. Check your local MAC’s website for details.

Q: Do I need a separate form for each provider?#

A: Yes, unless you check the multiple providers box in Part 2 and attach a separate sheet with each provider’s details.

---

9. References#

• Official CMS 1490S Form Download
• Medicare Claims Processing Guidelines
• Find Your Local Medicare Administrative Contractor
• MyMedicare.gov Portal