Etiquette
How to address an envelope to a doctor
Use Dr. before the name for a social letter, and the name followed by MD for anything work related. Never use both at once. Dr. Alice Chen is right, Alice Chen MD is right, and Dr. Alice Chen MD is not. For a married couple where she is the doctor, write Dr. Alice Chen and Mr. Ben Chen, with the doctor listed first.
Checked July 30, 2026/8 min read
Written by Claire PostReviewed against USPS Publication 28
What is on this page7 sections
Two rules cover almost every envelope you will ever send to a doctor, and they contradict each other on purpose.
Socially, the title goes in front. At work, the degree goes after. Which one you pick tells the reader what kind of letter this is before they open it, and using both at once is the mistake that gets noticed.
The harder part is couples, because the old rule that put the husband first is gone and the rule that replaced it is about the title, not the person.
Step by step
Pick Dr. for social mail
Birthday cards, invitations, thank you notes and anything sent to a home address use Dr. in front of the full name.
DR ALICE CHEN1420 N BROADWAY APT 4BDENVER CO 80202CorrectA social letter to a doctor at home. Pick MD for work mail
Anything sent to a practice, a hospital or a professional group puts the degree after the name instead. This is also the form to use on a business letter.
ALICE CHEN MDMOUNTAIN RIDGE CLINIC88 PINE GROVE RD STE 300ITHACA NY 14850CorrectA work letter, degree after the name. List the doctor first when a couple has one title between them
The person with the professional title goes first, whether that is the husband or the wife. This is the part most guides get backwards.
DR ALICE CHEN AND MR BEN CHEN1420 N BROADWAYDENVER CO 80202CorrectShe is the doctor, so she is listed first. Use The Doctors when both are doctors and share a last name
If they use different last names, write both out in full and put them in alphabetical order by last name.
THE DOCTORS CHEN1420 N BROADWAYDENVER CO 80202CorrectTwo doctors, one shared surname. Match the degree the person actually holds
MD, DO, DDS, DVM and PhD are all different. If you are not sure, Dr. in front of the name is safe for social mail and never wrong.
A few real examples
The steps above cover the rule. These show it applied to a spread of real situations, so you can match yours to the closest one.
Quick reference
| Situation | Write this | Not this |
|---|---|---|
| Social letter | Dr. Alice Chen | Dr. Alice Chen MD |
| Work letter | Alice Chen MD | Dr. Alice Chen MD |
| She is the doctor | Dr. Alice Chen and Mr. Ben Chen | Mr. and Dr. Ben Chen |
| Both are doctors, same name | The Doctors Chen | Dr. and Dr. Chen |
| Both are doctors, different names | Dr. Alice Chen and Dr. Ben Ruiz | The Doctors Chen and Ruiz |
| Retired physician | Dr. Alice Chen | No change, title is kept for life |
Special cases
The rule above covers most people. Here is what changes for the rest.
What is the difference between MD, DO, DDS, DMD, DVM, OD, PhD and DC?
All of them are doctorates and all take Dr. socially, but they are different fields. MD is a medical doctor and DO an osteopathic physician, both practicing general or specialized medicine with equivalent standing. DDS and DMD are both dentistry degrees, different names for the same qualification depending on the school. DVM is veterinary medicine, OD is optometry, DC is chiropractic, and PhD is an academic doctorate rather than a clinical one. On an envelope, all of them follow the same Dr.-before or degree-after rule regardless of which field they are in.
Does a doctor keep the title Dr. after retiring?
Yes. A medical or academic doctorate is not tied to active practice, so a retired physician, dentist or professor keeps Dr. for the rest of their life unless they specifically ask otherwise.
What is the difference between the outer and inner envelope on a formal wedding invitation?
The outer envelope carries the full formal address, including street address and titles in full, since it also has to function as a normal piece of mail for the carrier. The inner envelope, placed inside and handed over in person or opened at home, drops the address entirely and uses a shorter, warmer form of the name, such as Dr. Chen and Mr. Chen instead of the full formal line.
What about a professor who holds a PhD but is not a medical doctor?
The same Dr. rule applies, but the professional-context version usually swaps MD-style letters for the specific degree or, more often in academic settings, no letters at all beyond Dr. A university address in particular tends to favor Dr. Jane Ruiz on its own over Jane Ruiz PhD, the reverse of how a medical practice usually prefers the letters-after style.
How do I address a member of the clergy who also holds a doctorate, such as a Reverend Dr.?
Both titles can appear together, in the order Reverend Dr., because one identifies a role and the other a credential rather than restating the same thing twice the way Dr. and MD do. The Reverend Dr. Alice Chen is correct and is not the same situation as the never-combine-Dr.-and-MD rule, which exists specifically because Dr. and a medical post-nominal both signal the identical piece of information.
Key terms on this page
- Post-nominal
- A set of letters placed after a name to show a degree or qualification, such as MD or PhD. The alternative to a title placed before the name, like Dr.
- Precedence
- Which of two names or titles is listed first on a shared piece of mail. For a couple where one holds a professional title, the titled person is listed first regardless of gender.
- Inner envelope
- The smaller, unaddressed envelope inside a formal double-envelope invitation, using a shorter and less formal version of the names than the outer envelope carries.
- Osteopathic physician
- A doctor holding a DO degree, one of the two primary medical degrees in the United States alongside MD. Addressed identically to an MD on an envelope.