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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
appointment is required
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "appointment is required" is correct and usable in written English.
It can be used in contexts where a meeting or consultation must be scheduled in advance. Example: "To ensure you receive the best service, please note that an appointment is required for all consultations."
✓ Grammatically correct
TechCrunch
BMC Health Services Research
Plosone
BMJ Open
Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy
BMJ Quality and Safety
BMC Pulmonary Medicine
The New York Times
The Guardian - Travel
Los Angeles Times
BMC Family Practice
SERIEs
BMC Health Services Research
The Guardian - Opinion
BMC Psychiatry
WikiHow
BMC Public Health
BBC
Huffington Post
The New York Times - Tech
Acta Neurochirurgica
Independent
The Economist
Alternative expressions(1)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
3 human-written examples
If an in-store appointment is required, users can schedule this in the app and receive a reminder notifications.
News & Media
Out of hours clinics work on a drop-in basis, where no previous telephone appointment is required.
Science
For example, a patient might decide in conversation with a nurse by telephone that an appointment is required, and currently the nurse specialist may find barriers, such as location of administrators, in booking an appointment.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
55 human-written examples
This worry seems partially justified since, even when appointment was required to allow the proxy "to keep contacts with the health authorities and to give informed consent", in 87% of cases the tutelary judge also conferred him/her the power "to manage the patient's property".
Science
No appointment was required, and HIV tests were performed on a first-come first-served basis.
Science
Only those who received a morning appointment were required to be fasted for blood measures.
The exception was one 'walk-in' practice (2%) which sent text (SMS) messages to patients to advise that a normal test result had been returned and that no follow-up appointment was required.
Science
Greater consideration of clinic case mix and frequency of appointments is required, particularly for patients with stable disease.
Science
Appointments are required.
News & Media
Appointments are required on Saturdays.
News & Media
(A forewarning: though materials are readily available to researchers, appointments are required).
News & Media
Expert writing Tips
Best practice
When stating that an "appointment is required", clearly indicate how and where the appointment can be made (e.g., phone number, website).
Common error
Avoid simply stating that an "appointment is required" without providing instructions on how to schedule it. Always provide clear contact information or a link to an online booking system.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "appointment is required" functions as a directive, indicating a necessary condition or prerequisite. As Ludwig AI explains, it explicitly states that a meeting or consultation needs to be scheduled in advance.
Frequent in
Science
32%
News & Media
30%
Formal & Business
15%
Less common in
Wiki
8%
Encyclopedias
5%
Social Media
0%
Ludwig's WRAP-UP
The phrase "appointment is required" is a common and grammatically correct way to indicate that scheduling in advance is mandatory. As Ludwig AI confirms, it's suitable for various contexts, from formal announcements to everyday communications. Related phrases include "prior booking is necessary" and "advance scheduling is needed". When using this phrase, remember to provide clear instructions on how to book an appointment to avoid confusion. The phrase is most frequently found in scientific and news media contexts, reflecting its broad applicability.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
appointment must be scheduled
Focuses on the action of scheduling, emphasizing that it's not optional.
prior booking is necessary
Emphasizes booking in advance as a prerequisite.
advance scheduling is needed
Highlights the need for scheduling before a specific time.
scheduling beforehand is a must
Uses stronger wording to convey the non-negotiable aspect of scheduling.
it is necessary to book in advance
Formal rephrasing focusing on the necessity of booking.
a reservation is mandatory
Replaces "appointment" with "reservation", suggesting a more formal context.
you must book an appointment
Directly addresses the user, indicating their obligation.
an appointment is a prerequisite
Highlights that the appointment serves as a condition that must be met first.
appointments are compulsory
Shifts to plural form to indicate that multiple appointments have the quality of being obligatory.
please schedule an appointment beforehand
Politely requests the user to schedule, making it more user-friendly.
FAQs
How to use "appointment is required" in a sentence?
Use "appointment is required" to clearly state that scheduling in advance is mandatory. For example, "Due to high demand, an appointment is required for all consultations."
What can I say instead of "appointment is required"?
You can use alternatives like "prior booking is necessary", "advance scheduling is needed", or "a reservation is mandatory" depending on the context.
Which is correct, "appointment is required" or "appointments are required"?
Both are correct, but they have different meanings. "Appointment is required" refers to a single event. "Appointments are required" suggests a general rule or multiple instances.
What's the difference between "appointment is required" and "appointment is needed"?
"Appointment is required" indicates a mandatory condition, while "appointment is needed" suggests a recommendation. The former implies it's not optional, the latter suggests it's beneficial or advisable.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested