DIC • Medical Causation • Physician-Led

Complex DIC cases. Clear medical reasoning.

Independent cause-of-death medical opinions for attorneys handling DIC claims and surviving families seeking private review. Every case is personally reviewed and every opinion authored by Dr. John H. Hart, Jr., M.D., drawing on 25+ years of clinical medicine and a career in military aerospace medicine.

A deliberately limited caseload allows thorough review of the medical record, competing explanations, and the causation question.

Board-Certified, ABIM Lt Col, USAF (Ret.) 25+ Years Clinical Practice

What You Can Expect

  • Every opinion personally authored by Dr. Hart, M.D.
  • Defensible reports suitable for VA and legal use
  • Secure, HIPAA-compliant communication via SimplePractice
  • Turnaround confirmed after case review — expedited review available (30% surcharge on the assigned case fee)
  • Attorney referrals and private family cases nationwide
Independent Medical Causation Review

DIC opinions for attorneys and families

Dependency & Indemnity Compensation (DIC) cases turn on the evidence connecting a veteran's death to military service or service-connected conditions. Choose the path that fits your case.

Complex & Attorney-Referred DIC

Physician-led analysis for counsel handling complex cause-of-death questions. A thorough review of the record, competing medical explanations, and the reasoning that supports the independent opinion.

For Attorneys →

Family & Private DIC

Private medical opinion services for surviving spouses and families seeking to understand whether the medical evidence supports a connection between a veteran's death and service. You may inquire directly without an attorney referral.

For Families & Survivors →
DIC review: scope and fee confirmed before engagement
Private family DIC opinions: $4,000 standard, $5,500 complex, $7,000 exceptional — see DIC pricing. Counsel can review the attorney referral process. Turnaround is confirmed after case review; expedited review is available when capacity allows, for a 30% surcharge on the assigned case fee.
Request Case Review

Additional service: VA disability nexus opinions

General nexus opinions for living veterans remain available following case review, including secondary service connection. Fees range from $1,500 to $3,500 based on complexity. Inquire about a nexus opinion →

Independent opinions only — no DBQs, no in-person exams, no diagnosis or treatment. Secure document exchange through SimplePractice.

Simple, Transparent, Secure

Our Process

Four clear steps from first contact to a completed, defensible medical opinion.

1

Initial Intake Review

We confirm the scope of your case, the records available, and your objectives — before any commitment.

2

Acceptance & Payment

If your case is accepted, you receive a secure SimplePractice link for payment and document exchange.

3

Record Review & Analysis

Dr. Hart conducts a comprehensive, evidence-based assessment of your medical and service records.

4

Final Report

You receive a defensible medical opinion, personally authored and suitable for VA and legal use.

Turnaround: Confirmed at ReviewVaries by case type and complexity
Expedited Review30% surcharge on the assigned case fee
Dr. John H. Hart, Jr., M.D. — Lt Col, USAF (Ret.), Senior Flight Surgeon
Lt Col, USAF (Ret.) — Senior Flight Surgeon
Physician-Led, By Design

John H. Hart, Jr., M.D.

Dr. Hart is a board-certified internal medicine physician with more than 25 years of clinical experience across hospitals and clinics. He brings that same clinical rigor — and a career in military medicine — to every independent opinion he writes.

A retired Lieutenant Colonel and Senior Flight Surgeon in the USAF Reserve, he deployed multiple times in support of Operation Iraqi Freedom and Operation Enduring Freedom as a Critical Care Air Transport physician. He understands service-connected medicine because he has lived it.

  • Independent medical opinions for veterans in any state
  • M.D., Board-Certified Internal Medicine (ABIM)
  • Lieutenant Colonel, USAF Reserve (Ret.) — Senior Flight Surgeon
  • Former Chief of Aerospace Medicine, U.S. Air Force (Retired)
  • Former Hospital Medicine Director
What Colleagues & Clients Say

Reviews

Five-star endorsements from fellow military medical officers and the veterans we serve.

“Hart Causation and Claims LLC is an organization I can wholeheartedly support. Dr. John Hart isn't just an amazing professional — he's an absolute class act.”
Peter K. Tiernan, MD, MPH (Retired)Senior Flight Surgeon
“I'm incredibly grateful for the exceptional support I received during one of the toughest times in my life.”
Linda Dunegan, Lt Colonel, PhD (Retired)Medical Service Corps Officer
“I want to sincerely thank you for the wonderful nexus letter you provided on behalf of my father. My mom was approved for DIC and service connection for the cause of death was granted. I cannot thank you enough.”
A Surviving FamilyDIC Granted
Straight Answers

Frequently Asked Questions

Questions from referring attorneys, surviving families, and veterans about independent medical opinions.

What is a DIC letter?

A Dependency & Indemnity Compensation (DIC) letter is a physician's opinion for surviving spouses and families, addressing whether a veteran's death was linked to a service-connected condition.

How do attorneys refer a DIC case?

Start with the attorney referral page for complex DIC and cause-of-death opinion services. Include a brief description of the medical causation question and any deadline. Scope, records, fees, and timing are confirmed before engagement.

Can a surviving family request a private DIC opinion?

Yes. Surviving spouses and families may inquire directly without an attorney referral. Visit DIC services for families and survivors for the process, records checklist, and published fees. Conclusions follow the medical evidence; no claim outcome is guaranteed.

What is a nexus letter?

A nexus letter is an independent medical opinion, written by a physician, that connects your current medical condition to your military service — or to an existing service-connected condition — using the VA's "at least as likely as not" evidentiary standard.

Who can write a nexus letter?

Any licensed physician may write one, but credibility drives the weight it carries with VA reviewers. Opinions hold more probative value when authored by a board-certified physician who reviews your complete record. Every Hart Causation opinion is personally authored by Dr. John H. Hart, Jr., M.D. — ABIM board-certified, 25+ years of clinical experience, and a career in military aerospace medicine.

How much does a nexus letter cost?

Fees vary by case type. General nexus letters for VA disability claims range from $1,500 to $3,500 depending on complexity. DIC (cause-of-death) opinions for surviving spouses are priced separately — $4,000 standard, $5,500 complex, $7,000 exceptional. Expedited review is available for a 30% surcharge on the assigned case fee. You receive a scope confirmation before any commitment.

How long does a nexus letter take?

Turnaround is confirmed after an initial case review and varies by case type and complexity. Expedited review is available for deadline-driven claims and appeals, for a 30% surcharge on the assigned case fee.

Do you write nexus letters for secondary conditions?

Yes. Opinions can address secondary service connection — conditions caused or aggravated by an existing service-connected disability — where the medical evidence supports the connection.

Do you complete DBQs or perform C&P exams?

No. Hart Causation and Claims provides independent medical opinions only — no DBQs, no in-person exams, no diagnosis or treatment. All communication runs through secure, HIPAA-compliant channels.

What does the medical opinion service include?

The work includes review of the supplied medical and service records, analysis of the causation question and conflicting evidence, and a reasoned independent opinion personally authored and signed by Dr. Hart. The scope is confirmed before engagement, and conclusions follow the evidence.

Start the Conversation

Contact Us

Attorneys and families are welcome to inquire directly. Briefly describe the causation question and any deadline; we will confirm scope, records, and availability before engagement.

Reach Us Directly

Submitting information does not create a patient-physician relationship. All communications are confidential and used solely for consulting purposes.

Sent securely over an encrypted connection. Please do not include detailed medical records here — a secure, HIPAA-compliant upload link is provided after intake review.