USCG Captain’s License Medical Disqualifiers: What You Need to Know

Almost no health condition automatically bars you from a U.S. Coast Guard captain’s license. The Coast Guard reviews your medical fitness one applicant at a time, using the exam recorded on Form CG-719K. Common conditions like sleep apnea, heart disease, and diabetes usually clear once your doctor documents them.

Found your condition on a list of captain’s license medical disqualifiers? Take a breath. Most conditions that look like dealbreakers turn out to be manageable once your doctor puts them in writing.

The Coast Guard cares about one thing: whether you can run a boat and handle an emergency safely. A diagnosis rarely ends your shot at a license. It usually just adds a form to your application.

Disclaimer

Coast Guard medical processes change. This guide explains current USCG guidance in plain terms, but your situation is unique. For a determination on your condition, contact the NMC Medical Helpdesk at 1-888-427-5662.

We are here to provide guidance, but the National Maritime Center is the ultimate issuing authority. Contact them for specific guidance.

What Counts as a Medical Disqualifier for a Captain’s License?

A medical disqualifier is any condition that, left undocumented, can stop the National Maritime Center from issuing your medical certificate. The National Maritime Center (NMC) is the Coast Guard office that reviews every mariner’s health file. Its medical standards sit in a federal regulation, 46 CFR 10.302, and they ask one question: Can you perform routine and emergency duties at sea safely?

The Coast Guard groups its concerns into vision, hearing, general medical conditions, and physical ability. Most “disqualifiers” you read about online are conditions that need documentation, not automatic denials. The difference between a delay and a denial is almost always paperwork.

Is a captain’s license medical disqualifier permanent?

No. Any cause for rejection applies only while the condition persists or stays likely to cause complications. If your condition is treated, stable, and documented, the same diagnosis that delayed one applicant can clear review for you.

The Top 5 Conditions That Delay or Deny Applications

Five conditions account for most medical holds on captain’s license applications. None of them is an automatic disqualifier on its own. Each one delays a file when the applicant shows up without supporting documentation, and each one tends to clear when a treating provider confirms the condition is stable and managed. Here’s the short list and what the NMC wants to see.

The pattern holds for all five: document the condition, show it’s controlled, and the NMC can clear it. Chronic narcotic use also triggers a separate rule, the DOT 5-panel (a federal five-substance drug screen), which must fall within 185 days of your application under 46 CFR 16.220.

Which condition delays the most applications?

Vision problems and incomplete documentation drive a large share of “awaiting information” holds, according to NMC data on medical certificate processing. Most are avoidable. A complete CG-719K with the right attachments prevents the back-and-forth that adds weeks to a file.

How the Coast Guard Reviews Your Medical Exam

The NMC runs every CG-719K through a three-step medical review, though most applicants never pass the first step. Reviewers escalate a file only when a condition falls outside the previous reviewer’s authority. Understanding the ladder tells you why a clean, well-documented form moves fast and a vague one stalls.

1. Medical screening. A certified or registered medical assistant reviews every exam that arrives. These screeners clear roughly 70% of files with no further review.
2. Initial medical review. A physician assistant or mid-level provider handles any condition outside the screener’s scope. They can grant waivers, request more information, or call your physician with questions.
3. MD review. A file that still looks borderline goes to senior evaluation staff for a final fitness determination.

When evaluators need more, they issue an “awaiting information” request rather than a denial. That’s your chance to supply the missing letter, test result, or compliance record before any decision is made.

What is “awaiting information” on my application?

It means the NMC needs more from you before finishing the evaluation. A medical exam often flags a treatment, injury, or medication that needs clarification. Responding quickly with the requested document is the fastest way to keep your file moving.

Conditions the Coast Guard Often Works With

Plenty of conditions that sound disqualifying are routinely approved with documentation. The Coast Guard built waivers and limitations into the system precisely because a fixed list can’t capture every real-world case. These are the conditions we field the most questions about, and how each one tends to go.

Sleep apnea. No longer an automatic disqualifier. You’ll need a letter confirming the condition is controlled, proof of treatment compliance such as CPAP usage reports, and sometimes a recent sleep study for moderate to severe cases.

Heart conditions. Usually manageable when you’ve been free of heart-related events for more than 18 months and your cardiologist documents that the condition is stable. Each case differs, so the NMC may ask for more detail.

Color vision. Not an automatic bar. An applicant who sees only in black and white can still earn a license, sometimes with a restriction limiting professional use to daylight hours. The Farnsworth Lantern Test (FALANT) is a recognized way to assess maritime color vision.

Diabetes. Type 1 or type 2 can qualify when well controlled. The Coast Guard typically looks for an A1C (a measure of your average blood sugar) under 8 and no serious complications, such as insulin shock, in the past 18 months.

Blood pressure and medications. The Coast Guard typically looks for blood pressure under 150/90. If you take prescription medication, you can still qualify; call the NMC to confirm how a specific drug affects your application.

Can I get a captain’s license if I have sleep apnea?

Yes, as long as it’s well controlled and managed. Provide a doctor’s letter confirming control, proof of treatment compliance, and a recent sleep study if your case is moderate to severe. Meet those, and approval is likely.

Can I get a captain’s license if I’m colorblind?

Usually, yes. Color blindness rarely bars a license outright, though it can add a daylight-only restriction for professional use. The Farnsworth Lantern Test is a good way to document your color vision for the Coast Guard.

Medical Waivers, Limitations, and Restrictions

When a condition falls short of the standard but doesn’t pose a real safety risk, the NMC can issue a waiver under 46 CFR 10.303. A waiver often carries a limitation, such as a daylight-only limit or a restriction to certain waters, and it puts an obligation on you. You carry the waiver letter whenever you operate under your credential.

A waiver acknowledges that the Coast Guard knows about your condition and expects you to report any change. Conditions that worsen can affect your fitness for certification later. Skip the reporting or ignore the limitations, and the NMC can void the waiver.

Does the Coast Guard offer medical waivers?

Yes. The NMC grants waivers for documented conditions that don’t pose a significant risk to maritime safety. Read the waiver letter closely, follow any limitations it names, and report changes in your condition to keep it valid.

What to Do Before Your CG-719K Exam

A little preparation turns a stressful exam into a formality. Your physical exam goes on Form CG-719K, the Application for Medical Certificate, and most of our students complete it with their family doctor. Bring your documentation to the appointment instead of scrambling for it after the NMC asks.

1. Download the current CG-719K and read it before your visit.
2. Gather provider letters for any condition on the top-five list.
3. Collect treatment-compliance records, recent test results, and a list of medications.
4. Confirm your DOT 5-panel drug test falls within 185 days of applying.
5. Submit the completed form with your credential application to the NMC.

Walk in prepared, and most conditions that worry applicants come down to one attached letter: proof your condition is known, treated, and stable.

Frequently Asked Questions

What are the medical requirements for a captain’s license?

You must be physically fit to perform routine and emergency duties at sea, with adequate vision, hearing, and general health under 46 CFR 10.302. A licensed practitioner documents your fitness on Form CG-719K. No medical history is expected to be perfect.

What is the medical certificate, and what does it authorize?

The medical certificate is the Coast Guard’s proof that you meet the medical and physical standards for a Merchant Mariner Credential (MMC), the official credential behind your captain’s license. It confirms you can handle basic safety duties, communicate and hear alarms, and serve at sea without a condition or medication that impairs you.

Can I get a captain’s license with type 1 or type 2 diabetes?

Often, yes, when your diabetes is well controlled. The Coast Guard typically looks for an A1C under 8 and no serious complications in the past 18 months. Confirm your specific situation with the NMC.

What blood pressure do I need for a captain’s license?

The Coast Guard typically looks for blood pressure under 150/90. If yours runs higher, a provider note on treatment and control helps your case during review.

Where do I send Form CG-719K?

Submit the completed CG-719K to the National Maritime Center with your credential application. For condition-specific questions, the NMC Medical Helpdesk can tell you what documentation your case needs before you apply.

Sources

• 46 CFR 10.302, Medical and physical requirements for merchant mariner credentials (eCFR)
• 46 CFR 10.303, Medical waivers, limitations, and restrictions (eCFR)
• 46 CFR 10.305, Vision standards (eCFR)
• 46 CFR 16.220, Drug-testing requirements and timing (eCFR)
• Merchant Mariner Medical Manual, COMDTINST M16721.48 (U.S. Coast Guard)
• National Maritime Center, Medical Fitness for Certification (NMC)

Conclusion

A diagnosis on the disqualifier list isn’t a verdict. It’s a documentation task. The mariners who stall treat the CG-719K as a hurdle. The ones who pass treat it as their chance to show the Coast Guard they’re safe on the water.

Get your provider letters in order, confirm your conditions are stable, and submit a complete form. From here, your next move is the license itself.

Ready to start? The OUPV/Six-Pack Captain’s License lets you carry up to six paying passengers, and the 25/50/100-Ton Master Captain’s License covers larger and inspected vessels. We wrote the exam ourselves and include it in the course price, with no surprise fees, and we’ve guided more than 200,000 students through the process. We’re not going to let a medical form be the reason you don’t earn your license.

by Bob Figular, Founder & President | Mariners Learning System

Captain Robert “Bob” Figular is the founder of Mariners Learning System, an innovative online education provider for aspiring boat captains. A former United States Navy Petty Officer turned world sailor, Captain Bob’s multi-year voyages around the world inspired him to revolutionize maritime education. In 2002, he established Mariners Learning System, which became the first U.S. Coast Guard-approved online course provider for captain’s licenses. With a USCG Master’s License and a passion for accessible, comprehensive boating education, Bob continues to lead Mariners Learning System in equipping students with essential knowledge and skills for safe, confident operation and navigation.