St. Louis Social Security Attorney

The Guidance You Need

In Social Security Disability Claims

When you can no longer work because of illness or injury, your financial security is at risk. Savings run out quickly, and the need for disability benefits becomes urgent. At NMN LLC, our St. Louis Social Security attorneys help disabled individuals pursue the Social Security Disability benefits they deserve.

Trusted Guidance for Social Security Disability Applications and Appeals

Schedule A Consultation Today

Two Different Social Security Disability Programs

The Social Security Administration (SSA) provides disability benefits under two programs:

Social Security Disability Insurance (SSDI)

SSDI benefits are available to those who have worked and paid Social Security taxes, but can no longer work due to disability. Our SSDI lawyers ensure your disability claim is supported by the right medical evidence and work history.

Supplemental Security Income (SSI)

SSI benefits are available to disabled individuals with limited income and resources, regardless of their work history. This program often helps younger people with disabilities or older individuals with insufficient contributions into the system. Our disability attorneys guide you through eligibility and application requirements to secure support.

Take the First Step:

Schedule Your Free Consultation

Applying for Social Security Disability benefits doesn’t have to feel overwhelming. At Niesen, McDonough & Niesen LLC, our attorneys will guide you through every step of the process, from filing your initial application to appealing a denial. Whether you need help with SSDI claims, SSI benefits, or representation before an administrative law judge, we provide clear legal advice and practical solutions to give you peace of mind. Let us help you make informed decisions today so you can secure the financial support you and your loved ones need for tomorrow.

Help at Every Stage of the Process

Whether you’re applying for the first time or appealing a denial, NMN is here to help. We know exactly what the Social Security Administration (SSA) looks for in a disability determination and how to present strong medical evidence to support your case. From preparing initial applications to improve your chances of approval, to handling reconsiderations and appeals, our attorneys  strengthen your claim. We also provide persuasive representation at hearings before administrative law judges and, when necessary, pursue cases before the Appeals Council or even in federal court. Because most claimants are denied at least once before benefits are awarded, having an experienced disability attorney on your side is critical. Our team knows how to identify problems, resolve them, and build the strongest possible case for the benefits you deserve.

Social Security Services

That We Provide

At NMN Law, our attorneys handle all aspects of Social Security Disability law, from first applications to appeals:

Disability Applications & Claims

Step-by-step guidance to improve your chance of approval.

SSDI Benefits & SSDI Claims

Helping qualified workers secure Social Security Disability Insurance.

SSI Claims

Advocating for those who qualify for Supplemental Security Income.

Disability Appeals

Handling Denials at all stages, including reconsideration and hearings.

Administrative Hearings Representation

Advocating for you before an Administrative Law Judge (ALJ).

Appeals Council & Federal Court Appeals

Taking your case further if SSA denies benefits.

Medical Evidence Gathering

Building strong cases with detailed medical documentation.

Children's SSI Claims

Pursuing benefits for children with disabilities.

Widows/Widowers SSDI Claims

Helping surviving spouses secure disability-related benefits.

Continuing Disability Reviews (CDR)

Ensuring benefits continue during periodic SSA reviews.

Results That Speak

Hundreds
of disability claims successfully resolved in Missouri & Illinois
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Combined Years of Experience
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Client Satisfaction Rate
Bosnian / Croatian / Serbian Translation Available

What Our Clients Say

Mark Niesen helped me get Social Security Disability because I was diagnosed with Lymphoma. I got approved very quickly and the man didn't even make any money because I wasn't owed any back pay.

He was always kind to me and would talk to me and answer any questions I had.

I recommend Mark Niesen to be your lawyer. He doesn't make you feel like you're wasting his time. I'm very happy I got my benefits quickly.

Take the First Step:

Schedule Your Free Consultation

When you or a loved one is unable to work due to disability, turn to St. Louis Social Security attorneys you can trust. At NMN LLC, we are here to fight for your benefits, guide you through the application or appeal process, and secure the financial support you need.

Frequently Asked Questions​

About Social Security in Missouri

What is ‘disability’ as defined by the Social Security Administration?

The Social Security Administration defines disability as, “the inability to engage in substantial gainful activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or has lasted or can be expected to last for a continuous period of not less than 12 months.”

Substantial Gainful Activity is a gross amount of money an individual can make in a given month and still qualify for Social Security Disability. This amount is reviewed annually. The substantial Gainful Activity (SGA) amount for 2025 is $1,620.00 per month.

No. You DO NOT need to wait 12 months after you are no longer engaged in substantial gainful activity to apply for Social Security Disability or Supplemental Security Income. You may file as soon as you have stopped working or making under the substantial gainful activity amount.

Yes. Children may qualify for Supplemental Security Income (SSI). There are 6 functional domains that the child is evaluated in if the child does not meet or equal listing. These domains are:

  1. Acquiring and using information
  2. Attending and completing tasks
  3. Interacting and relating with other
  4. Moving about and manipulating objects
  5. Caring for yourself
  6. Health and physical well-being

To be functionally equivalent to a listing, the impairment(s) must cause marked limitations in two of the six domains or an extreme limitation in at least one of the domains.

A “marked” limitation in a domain exists when your impairment(s) in a domain interferes seriously with your ability to independently initiate, sustain, or complete activities. A “marked limitation” also means a limitation is “more than moderate” but “less than extreme.”

An “extreme” limitation in a domain exists when your impairment(s) interferes very seriously with your ability to independently initiate, sustain or complete activities. “Extreme” limitation also means a limitation that is “more than marked.”

A listing is medical criteria for certain body systems or medical conditions that if an individual can meet, will qualify for disability. The listings are quite technical and some individuals may meet some of the criteria and not others. An individual can still be found disabled if they do not meet a listing.

News & Articles

5 reasons why your SSDI claim may be denied

Applying for Social Security Disability Insurance (SSDI) can be a lifeline when a medical condition prevents you from working. Unfortunately, most first-time claims are denied, which can leave individuals frustrated and unsure of what went wrong. Understanding the most common reasons for denial is a first step toward building a stronger application or preparing for an appeal. …

Can you appeal a Social Security disability denial?

If you’ve applied for Social Security Disability Insurance (SSDI) or Supplemental Security Income (SSI) and received a denial, don’t worry. You can appeal the decision. The process can feel overwhelming, but by taking the proper steps, it’s possible to overturn the denial and get the benefits you deserve. Understanding the appeal process The first thing …

What mental disorders qualify for SSDI?

Securing Social Security Disability Insurance (SSDI) benefits can feel overwhelming, especially when dealing with a mental health condition. The Social Security Administration (SSA) recognizes certain mental disorders as disabilities, making you eligible for benefits if you meet their criteria. Mood disorders Mood disorders, such as depression and bipolar disorder, are among the conditions that qualify …

Niesen, McDonough, & Niesen LLC

Office Hours:
  • Monday - Friday: 9:00 AM - 5:00 PM
  • Saturday: 9:00 AM - Noon by appointment