SSI Fax Number: Complete Guide to Faxing the SSA (2026)

By Alexey Spasskiy · Published May 9, 2026 · Updated April 10, 2026 · 8 min read

Quick Answer: There is no single national SSI fax number. Every local Social Security Administration (SSA) office has its own dedicated fax line. To find yours: check your SSA request letter, use the SSA Office Locator, or call 1-800-772-1213. Below is a complete guide covering every scenario — applications, appeals, medical evidence, and hearing offices.

If you've searched "SSI fax number" hoping for a quick number to copy down, you've run into the same wall as everyone else. The SSA does not publish a single national fax number — each of its 1,200+ local offices runs its own fax line.

This guide explains exactly how to find the right SSI fax number for your situation, what documents you can (and cannot) fax, how to submit SSI appeal evidence, and the fastest alternatives to faxing in 2026.

Why There Is No Single SSI Fax Number

SSI (Supplemental Security Income) is administered by the Social Security Administration — a federal agency with over 1,200 field offices across the country. Each office processes cases for its local region, and each maintains its own phone and fax lines.

There is no centralized "fax everything here" number because the SSA's document routing is automated. When you fax documents to the SSA, the system reads a barcode on the cover page to route your submission to the correct case file in the Certified Electronic Folder (CEF). If you fax to the wrong office — or use a number that doesn't match your case — your documents may never reach the right place.

How to Find Your SSA Office Fax Number (3 Methods)

Method 1: Check Your SSA Request Letter (Most Reliable)

If the SSA sent you a request for information — about an appeal, a redetermination, or a continuing disability review — the fax number for your case is printed on that letter. Use it. This is the most reliable method because it is specific to the office and case handler assigned to you.

Method 2: Use the SSA Office Locator

The SSA Field Office Locator lets you search by zip code and returns your local office address, phone number, and fax number.

1. Go to ssa.gov/locator
2. Enter your zip code
3. Select your local office from the results
4. The office detail page shows the direct fax number

Method 3: Call 1-800-772-1213

If you do not have a request letter and the locator does not list a fax number, call the SSA's main line at 1-800-772-1213 (Monday–Friday, 8:00 a.m.–7:00 p.m. local time). Ask the representative for your local office's fax number and specify what you're submitting (initial application documents, appeal evidence, medical records, etc.).

What Documents Can You Fax to the SSA for SSI?

The SSA accepts faxed evidence for most SSI matters — except the initial application form itself, which must be submitted online, by phone, or in person. Documents commonly submitted by fax include:

Step-by-Step: How to Fax SSI Documents

SSI Appeal Fax Numbers: Finding Your Hearing Office

If your SSI claim was denied and you've progressed to a hearing before an Administrative Law Judge (ALJ), you'll be dealing with the Office of Hearings Operations (OHO) — formerly called ODAR. Like field offices, every OHO hearing office has its own fax number.

The four levels of SSI appeals:

How to find your hearing office fax number:

1. Check your hearing notice — the OHO fax number appears at the top of the notice the SSA mailed you when scheduling your hearing
2. Use the Hearing Office Locator at ssa.gov/appeals/ho_locator.html
3. Call 1-800-772-1213 and ask for your hearing office's fax number by case number

The SSA also accepts online appeals through its AC iAppeal Online portal, which is often faster and provides electronic confirmation — see ssa.gov/appeals to file.

8 Mistakes That Delay Your SSI Case

• ✓Missing barcode cover page — the #1 cause of lost or misfiled fax submissions. Documents without the SSA barcode cannot be automatically routed to your case file.
• ✓Faxing to the wrong number — sending to a different region's office means your documents go into the wrong system. Verify the fax number matches your local office before sending.
• ✓Exceeding 200 pages per transmission — split large submissions into separate faxes, each with its own barcode page.
• ✓Illegible documents — the SSA scans everything it receives. Blurry pages, faint ink, or small text may not scan correctly and could be treated as blank pages.
• ✓Mixing records from multiple providers without separate barcodes — each provider's batch must start with its own barcode page, not a single barcode for the entire submission.
• ✓Not saving the transmission confirmation — your fax machine's confirmation printout is your only proof of what you sent and when. Keep it with your case records.
• ✓Assuming receipt without verification — a "sent" confirmation on your fax machine means the call connected, not that the documents were filed. Call the office to verify.
• ✓Using an outdated fax number — SSA offices periodically update their fax lines. Numbers from online forums or old correspondence may no longer work. Always verify through official SSA channels.

Faster Alternatives to Faxing SSI Documents

The SSA has invested heavily in electronic alternatives that are faster and easier than faxing. In most cases, these options are preferable.

eSignature and Document Upload (Best for Individuals)

The SSA's newest service lets you submit forms and evidence entirely online through your my Social Security account. When the SSA requests information:

1. They send you a secure link by email
2. You log in to your my Social Security account
3. Upload documents, complete forms, and sign electronically where required
4. You have a 30-day window to submit

No fax machine, no mail, no office visit. This covers over 50 SSA forms and nearly 80 types of evidence.

Electronic Records Express (Best for Healthcare Providers)

Healthcare providers, hospitals, and medical facilities submitting records for disability claims can use Electronic Records Express (ERE) — a free, secure SSA portal at ssa.gov/ere.

• Supports PDF, TIFF, DOC, DOCX, XLS, XLSX, JPG, and more
• 128-bit SSL encryption
• Free for all registered providers
• ERE Help Desk: 1-866-691-3061 (7 a.m.–5:30 p.m. EST, Monday–Friday)

This is the recommended method for faxing medical records to the SSA. It's more secure and provides automatic confirmation.

Online Appeals Filing

For reconsideration and ALJ hearing requests, the SSA accepts online submissions directly through its appeals portal at ssa.gov/appeals. This is faster than faxing the SSA-561-U2 form by hand and provides immediate acknowledgment.

Mail

Traditional mail to your local office is accepted for all document types. It is slower than faxing but useful when you don't have the correct fax number or when submitting original documents. Use certified mail with return receipt so you have documented proof of delivery.

Send SSI Documents Without a Fax Machine

If you don't have access to a fax machine, you don't need one. mFax.to lets you send a fax directly from your iPhone or Android phone in under 2 minutes — no hardware, no trip to a print shop.

1. Open the mFax app on your phone
2. Upload your documents (PDF, photo, or scan)
3. Enter the SSA fax number for your local office
4. Send — you receive a delivery confirmation immediately

mFax is significantly cheaper than faxing at a store ($1.89+ per page at UPS or FedEx), and you get a receipt you can save as proof of transmission. Over 5 million people use mFax, with a 4.8-star App Store rating.

This is especially useful when you're responding to a time-sensitive SSA request and cannot get to a fax machine. For HIPAA-sensitive SSI medical records, see our guide on faxing PHI securely — the same privacy standards apply whether you're sending to a doctor or a federal agency.

Summary: SSI Fax Number Quick Reference

No fax machine? mFax.to — fax from your phone, get a delivery receipt, and move on.