I'm from the Atlanta field office as well. I just got this same email with the same thing as OP. This is the official notice we received.
Your Form I-485, Application to Register Permanent Residence or Adjust Status does not include a completed and signed Form I-693, Report of Medical Examination and Vaccination Record.
Please submit a completed Form I-693, Report of Medical Examination and Vaccination Record.
Civil Surgeons and the Form I-693
A USCIS civil surgeon must complete and sign the form, and you must also sign the form. If the civil surgeon refers you to a specialist, the specialist must include his or her medical exam results and complete the proper sections of the Form I-693 before the civil surgeon may sign the form.
Important: Only a designated civil surgeon authorized by USCIS to conduct medical examinations is qualified to complete the Form I-693. The civil surgeon must sign and date the Form I-693. Signatures by a nurse, physician’s assistant, or a doctor not designated as a civil surgeon are not acceptable. You must sign and date the Form I-693 when instructed to do so by the civil surgeon. The original completed Form I-693 must be sealed in a separate envelope by the civil surgeon. The sealed envelope must be returned, unopened, to this office.
A list of designated civil surgeons can be obtained by calling the USCIS Contact Center at 1-800-375-5283, or via the USCIS website at www.uscis.gov and using the MyUSCIS Find a Doctor tool at my.uscis.gov/findadoctor. You will need to provide your zip code or address. If you are hearing impaired, please call the USCIS Contact Center TDD at 1-800-767-1833.
Civil surgeons must use the current edition (07/19/2022) of Form I-693. You can find the current edition of Form I-693 on USCIS’s website at www.uscis.gov. In addition, the civil surgeon must ensure that all parts of Form I-693 were properly completed.
Important: All Forms I-693 signed by civil surgeons on or after October 5, 2022, must use the 07/19/2022 edition of Form I-693. USCIS will not accept the 09/13/2021 version (or any previous editions) if the civil surgeon signed the Form I-693 after October 4, 2022.
Reminder: Effective October 1, 2021, applicants subject to the immigration medical examination must complete the COVID-19 vaccine series before the civil surgeon can complete an immigration medical examination and sign Form I-693. This applies to Form I-693 signed by civil surgeon on or after October 1, 2021.
Additional: If your application is based on your marriage to a United States Citizen (USC) or a Lawful Permanent Resident (LPR), and you or your spouse have not yet submitted evidence of the bona fides of your marriage, you may submit this evidence at this time to accelerate the processing of the decision on your case.
If you wish to submit supplemental documentation, you may do so by bringing the documentation to the Atlanta Field Office. You may drop the documents off on Saturday, April 15, 2023, or Saturday April 22, 2023, from 09:00 am to 01:00 pm. Our address is as follows:
USCIS Atlanta Field Office
2150 Parklake Dr. NE
Atlanta, GA 30345
Please include a copy of this e-mail with your Form I-693 to help us identify your case.
If your application is based on your marriage to a USC or an LPR and you would like to submit evidence of the bona fides of your marriage, please submit that evidence, with a copy of this notice, either:
o To the field office address above, or,
o If available, online by uploading the evidence through your USCIS account.