Atty. Mark Bancroft Langdon

Atty. Mark Bancroft Langdon

Mr. Mark Bancroft Langdon is a lawyer practicing healthcare, clinical trials, due diligence and 8 other areas of law.

Washington Washington 32 J. Erfahrung 32 year
Call (202) 367-9055 Book Appointment

Profile Summary

About Mark Bancroft Langdon at a glance

Mark Bancroft Langdon is a Partner based in Washington, District of Columbia, practforg at Sidley Austin Llp. They have 32+ years of legal experience, licensed to practice since 1994. Their practice focuses on m&a, white collar, litigation, and health care. Admitted to practice in Maryland (1994) and District of Columbia (1996). Educated at Cornell Law School (J.D., 1994) and Cornell University (B.A., 1991). Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

Über uns

  • Mr. Mark Bancroft Langdon is a lawyer practicing healthcare, clinical trials, due diligence and 8 other areas of law
  • Mark received a B.A. degree from Cornell University in 1991, and has been licensed for 32 years
  • Mark practices at Sidley Austin LLP in Washington, DC

Practice Areas Explained

Mark Bancroft Langdon's Areas of Practice

Each practice area below reflects the types of cases Mark Bancroft Langdon handles, with a brief overview of what that area of law covers.

Mergers & Acquisitions

Mark Bancroft Langdon is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in District of Columbia →

White Collar Crimes

Mark Bancroft Langdon is one of 20,025 white collar attorneys indexed nationally. Browse white collar attorneys in District of Columbia →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

Mark Bancroft Langdon is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in District of Columbia →

Health Care Law

Health care attorneys for HIPAA, Medicare, Medicaid, regulatory compliance, and medical licensing matters.

Mark Bancroft Langdon is one of 66,735 health care attorneys indexed nationally. Browse health care attorneys in District of Columbia →

Jurisdictional Context

Why local counsel matters in District of Columbia

Practforg law in District of Columbia. Legal matters in District of Columbia are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Washington are typically filed in the local municipal court or the appropriate District of Columbia state district court, depending on subject matter and amount in controversy. An attorney licensed in District of Columbia brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in District of Columbia courts without local counsel or pro hac vice admission.

Looking for additional District of Columbia attorneys? Browse all attorneys in Washington or all attorneys in District of Columbia.

Frequently Asked

Common questions about Mark Bancroft Langdon

Where is Mark Bancroft Langdon's law office located?
Mark Bancroft Langdon's law practice is located in Washington, District of Columbia. The firm is Sidley Austin Llp. You can contact the office directly through this profile page.
What practice areas does Mark Bancroft Langdon handle?
Mark Bancroft Langdon focuses on m&a, white collar, litigation, health care. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Mark Bancroft Langdon practiced law?
Mark Bancroft Langdon has 32+ years of legal experience and has been licensed since 1994.
Where did Mark Bancroft Langdon go to law school?
Mark Bancroft Langdon earned their education at (J.D., 1994); (B.A., 1991).
How can I contact Mark Bancroft Langdon for a consultation?
You can contact Mark Bancroft Langdon directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
Cornell Law School
- 1994
B.A.
Cornell University
- 1991

Bar Admissions

Maryland
Admitted: 1994
District of Columbia
Admitted: 1996

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