Exhibit 5.1
| Facsimile | Direct Dial |
April 23, 2026
Lucid Diagnostics Inc.
360 Madison Avenue, 25th Floor
New York, New York 10017
Ladies and Gentlemen:
We have acted as counsel to Lucid Diagnostics Inc., a Delaware corporation (the “Company”), in connection with the preparation of the Registration Statement on Form S-3 (File No. 333-291981), filed by the Company with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “Securities Act”), which was declared effective on March 26, 2026 (“Registration Statement”), and the offering by the Company pursuant thereto (the “Offering”) of an aggregate of 18,000,000 shares (the “Shares”) of the Company’s common stock, par value $0.001 per share (“Common Stock”), in an underwritten offering to the public. The Company has entered into an underwriting agreement (the “Underwriting Agreement”) with Canaccord Genuity LLC and BTIG, LLC, as the representatives of the underwriters (the “Representative”), for the offer and sale of the Shares in the Offering. A prospectus supplement relating to the Offering (the “Prospectus Supplement”) will be filed with the Commission in accordance with Rule 424 of the Securities Act. This opinion is being furnished in accordance with the requirements of Item 601(b)(5) of Regulation S-K under the Securities Act.
In rendering the opinion set forth below, we have reviewed (a) the Underwriting Agreement, (b) the Registration Statement, and the exhibits thereto, and the form of Prospectus Supplement, (c) the Company’s Certificate of Incorporation and Bylaws, each as amended and restated to date; (d) certain records of the Company’s corporate proceedings as reflected in its minute books; and (e) such statutes, records, and other documents as we have deemed relevant. In our examination, we have assumed the genuineness of all signatures, the authenticity of all documents submitted to us as originals, and conformity with the originals of all documents submitted to us as copies thereof. In addition, we have made such other examinations of law and fact as we have deemed relevant in order to form a basis for the opinions hereinafter expressed.
No opinion is expressed herein other than as to the laws of the State of New York, the corporate law of the State of Delaware, and the federal law of the United States of America.
Based upon and subject to the foregoing, we are of the opinion that the Shares have been duly authorized and when sold and issued in accordance with the terms of the Underwriting Agreement against payment therefor, will be validly issued, fully paid and non-assessable.
We hereby consent to the filing of this opinion with the Commission as an exhibit to the Company’s Current Report on Form 8-K being filed on the date hereof, and incorporation by reference of this opinion into the Registration Statement. We also consent to the use of our name as counsel to the Company and to all references made to us in the Registration Statement and the Prospectus Supplement. In giving this consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations promulgated thereunder. This opinion is expressed as of the date hereof and we disclaim any undertaking to advise you of any subsequent changes in the facts stated or assumed herein or of any subsequent changes in applicable law.
| Very truly yours, | |
| /s/ Graubard Miller |