Frequently Asked Questions


How do I activate my institution's site license?
New England Journal of Medicine customers will receive an email that contains account information and customer number. Use the link provided to begin the activation process. Administrators will create their own personal My NEJM account as part of the activation process. Site license administrators are responsible for maintaining up-to-date information on their institutional accounts (IP addresses, branding, and link resolvers) through the Institution Administration Center.

NEJM Journal Watch Online customers will have their account activated on their behalf and will receive an email with account information when this is complete.

New Catalyst Innovations in Care Delivery customers will receive an email that contains account information and customer number. Use the link provided to begin the activation process. Administrators will create their own personal My Catalyst account as part of the activation process. Site license administrators are responsible for maintaining up-to-date information on their institutional accounts (IP addresses, branding, and link resolvers) through the Institution Administration Center.


Can I use the same email address to administer my site license account and get access to NEJM Group site licenses as an individual?
Administrators who currently have an administrative account for their institution and have registered as an individual using separate email addresses should contact us to combine them under one email address.
I cannot use IP-based access. Do you offer any other access methods?
NEJM Group supports both OpenAthens and Shibboleth as access methods for institutions with a site license or archive access. More information on OpenAthens and Shibboleth can be found below.
I’m having trouble accessing my NEJM Group site license.
Our publishing platform may not support the browser you are using. TLS1.0 has been disabled by our platform provider due to PCI compliance; current browser versions do not support TLS1.0. You may use any one of the supported browsers (such as recent Chrome, Firefox, Safari (desktop and mobile), IE11, Android, etc.). Versions of Internet Explorer older than IE11 are no longer supported because they are not security compliant.

For more information about browsers that are supported, click here.

If you are still having access issues for,, or, please click here.

Can I access through EZproxy?

NEJM Group has created a new EZproxy stanza to replace separate stanzas previously used for the New England Journal of Medicine, NEJM Journal Watch, and NEJM Catalyst Innovations in Care Delivery. Please go here to download the latest stanza. In order to provide access, your EZproxy server must be configured with an SSL certificate. A Hosted EZproxy Include File is available for this resource. Hosted EZproxy customers will receive automatic updates with OCLC’s latest version of this stanza.

Please direct questions about EZproxy to OCLC support in your region.


I am a site license administrator. Do you have a guide for managing my account?
Yes, please download our following guides:  Guide for Institutional Administrators. Guide for Institutional Administrators.

How do I verify or update my email address, password, or personal information?
As an administrator, you will have your own NEJM or NEJM Catalyst account.

NEJM: Once you are signed in to, look for the link to My NEJM at the top right of the page. There, you will also see a link to My Account; this will bring you to your account summary.

NEJM Catalyst: Once you are signed in to, look for the link to MY NEJM Catalyst at the top right of the page. There, you will also see a link to My Account; this will bring you to your account summary.

I forgot my password. How can I retrieve my account information?
You may reset your password by clicking on “Sign-In” and selecting the “Forgot Password” link. An email will be sent to the email address associated with your account with instructions for resetting your password. Your password should be 6 to 20 characters long.

Please contact us for further assistance with your password.

Help with IP Addresses
An IP address is the numeric address of a computer connected to the Internet. On most networks, each computer has its own IP address. An IP address is not the same as a domain name or an email address. By inputting your institution’s IP addresses, you are uniquely identifying the eligible machines on your network and allowing access only to authorized users of your subscription.

IP management for your New England Journal of Medicine (NEJM) site license is maintained at the IP Registry.

Use of the IP Registry is FREE for libraries and will enable you to manage IP addresses for all your subscriptions in one place and broadcast changes with just one click to multiple publishers, including NEJM.

If you haven’t done so already, it’s easy to register for access to the IP Registry:

  • Sign up here from an IP associated with your institution and provide your institutional email address.
  • Confirm that the IPs currently listed for your institution and affiliated sites are correct.
  • Request to add or delete IPs right from the registry.

Here are some answers to questions we’ve received about the registry:

Can I manage IPs for multiple affiliated institutions?

Yes, the IP Registry allows a single administrator to manage multiple institutions. Institutional hierarchies and associated IPs can be customized as required and managed by a central administrator. Send a request to to request IP management privileges for multiple sites.

Can multiple staff members at my library register for access?

Yes, the IP Registry allows multiple administrators to manage the same institution. Once you are registered, you can also see who else is registered for your institution at the bottom of your main profile page.

Is the IP Registry secure?

Absolutely! Access to the registry is by IP address and username/password to ensure that it is secure.

Whom can I contact for more information?

Send your questions directly to the IP Registry customer service department at Answers to other FAQs can be found here. You may also download information about the registry on NEJM LibraryHub by clicking here.

Help with Institutional Remote Access
How does the remote-access feature for and work?
The remote-access feature for and is based on a pairing of accounts: the patron’s my account with your site license subscription. Any device can be used to pair and, once activated, patrons can use any device to access your or subscription as long as they are signed in to their account.

To pair accounts, patrons sign in to their or account while within their institution’s IP range. After this, patrons will have access to your institution subscription beyond the institution’s network for 180 days. Remote access is automatically reauthenticated and extended another 180 days every time patrons sign in to their account while within your organization’s network.

Do I have to do anything to ‘turn on’ this feature for my patrons?
Remote access is automatically enabled for your site license when the patron accesses their or account while logged into your institution’s network.

How do I ensure usage resulting from the remote-access feature is captured in COUNTER?
Without any change in process for you, all remote-access usage will be captured automatically in COUNTER reports – providing a more accurate assessment of your site license usage.

Can site license administrators view how many patrons are using the remote-access feature?
This information is available upon request. For more information, please contact customer service.

Must my patrons be physically on campus to activate remote access?
Patrons must be logged in to your network to pair your site license access rights to their account. If patrons can access your IP network by remote means, like VPN, they do not have to be physically on campus.

Is there a limit to the number of devices and/or browsers that can be used simultaneously?
Yes, there is a limit of 3 active concurrent sessions. Patrons will be notified via the Remote Access tab in My Account when they have reached the limit and will be asked to sign out of their account on one of the devices or browsers being used or wait 30 minutes until a session times out.

Will I need to do anything to oversee or manage patrons’ remote access to or
No oversight is needed. Patrons can easily monitor their institutional remote-access status from the My Account Remote Access tab while signed in to or

Where can I learn more about this feature?
Visit the Resource Toolkit section of NEJM LibraryHub Resource Toolkit for a site license administrator user guide. The Resource Toolkit also highlights the promotional materials available for use in your own library communications by emailing your request to

Help with OpenAthens
OpenAthens (part of Eduserv) is a service used to authenticate and authorize users for access to online services. You can learn more about using OpenAthens for your institution on the OpenAthens website.

New to OpenAthens?
If you would like to set up an OpenAthens account, you must first register with OpenAthens and then contact us to provide your OpenAthens Organization ID.
For more information about setting up an OpenAthens account, visit the OpenAthens website.

Please contact us with any further questions or if you are having trouble with your OpenAthens-based access to NEJM.

Help with Shibboleth
Shibboleth, like OpenAthens, is a service used to authenticate and authorize users for access to online services. You may manage your institution’s Shibboleth access information within the Institution Administration Center.

New to Shibboleth?
Learn more about joining a Shibboleth Federation and getting started. After you’ve set up your account, you can log into the Institution Administration Center to add your Entity ID URL.

Want to add NEJM to your Shibboleth Federation?
Please contact us.

Help with COUNTER Reports
Who can pull reports?
Any institution administrator can pull COUNTER reports for the institution(s) for which they are an administrator. If you’re not sure how to do this on your own, please contact us for instructions.

How can I pull reports?
COUNTER-compliant usage reports are available via email delivery in XML, HTML, and tab-delimited format using the Email Reports function on the Usage Reports tab of the Institution Administration Center. You can select the time period for which you want the reports, specify any additional recipients, and opt-in to be notified when COUNTER reports become available each month.

Are NEJM Group titles COUNTER 5 compliant?

All NEJM Group titles are fully COUNTER 5 compliant. Data is available for the current year plus the prior 24 months.

You will only find partial data for the month of July 2010 in this zip file due to a platform transition we undertook on July 24, 2010. In order to get an accurate COUNTER report count for the month of July 2010, you will need to combine the July 2010 report in the zip file with the July 2010 report that is generated via email. We’re sorry for any inconvenience that this causes. Reports from August 2010 forward are available in their entirety and should be generated using the Email Reports function at the top of the page.

Please contact us with questions about your COUNTER reports or if you are having trouble accessing them.

Help with SUSHI
SUSHI (Standardized Usage Statistics Harvesting Initiative) is a way for you to collect your institution’s COUNTER reports automatically, thereby eliminating the need for you to obtain each report manually.

We support the automatic harvesting of COUNTER reports via a secure COUNTER_SUSHI API. Information about configuring your SUSHI client is available at the Institutional Administration Center. You may also contact Customer Service for help by emailing

Help with Institutional Branding
You can upload your institution’s logo and name on the Branding & Link Resolvers tab of the Institution Administration Center. The logo and name will be displayed at the top center of pages on whenever members of your community access through your IP addresses. We support up to 50 characters of text or a greyscale logo of up to 200 x 28 pixels, in .jpg, .gif, or .png formats. If you upload a logo, it will override and display in lieu of any customized text you have entered.

Contact us if you have questions or encounter trouble uploading your branding graphics.

Help with Link Resolvers (OpenURL)
OpenURL is a type of Uniform Resource Locator (URL) intended to enable Internet users to more easily find a copy of a resource that they would be allowed to access. With OpenURL, your users can link directly from citations in NEJM to resources available in your library.

Already Have OpenURL?

If you already have OpenURL, you can configure directly within the Branding & Link Resolvers tab of the Institution Administration Center. Redirects are in place, so you can continue to construct your links to NEJM and NEJM Catalyst using one of the following configurations:

  • ../cgi/content/full/%VOLUME%/%ISSUE%/%SPAGE%

New to Open URL?
If you are interested in setting up OpenURL for your institution, visit the SFX Implementation page.
Please contact us with any questions or concerns.


ISSN Numbers 1533-4406
Print edition of NEJM: 0028-4793 2329-2881
Tax Identification Number
Massachusetts Medical Society’s tax ID number is 04-2050773.
Owner and Publisher
All NEJM Group publications are owned and published by the Massachusetts Medical Society.
Editorial Responsibility
Each publication’s editors are responsible for the content of their respective publications.
Accessibility is committed to being a valuable and accessible resource for all users. We strive to follow federal standards for technology accessibility for people with disabilities (Section 508) and the Web Content Accessibility Guidelines (WCAG) 2.0. recommended by the World Wide Web Consortium (W3C).

We will continue to investigate how to follow best practices and strive to provide a website in compliance with the latest accessibility guidelines and standards.

To view the current VPAT report for, click here.

Post-Cancellation Access

Upon termination of a site license subscription, the subscriber may request in writing to maintain online access to the content published from the effective date of the Subscription Agreement through the date of termination. Site license customers should follow this link to request access through Portico.  Post-cancellation access is also available through the Global LOCKSS Network.

NEJM and NEJM Catalyst Innovations in Care Delivery institutional customers should send a request to NEJM Journal Watch customers should follow this link to request access through Portico.

Interlibrary Loan
Licensed institutions may supply single copies of articles from the subscribed products to a noncommercial library by post, facsimile, or digital transmission to fulfill requests for Interlibrary Loan (“ILL”), provided such use is in accordance with Section 108 of the US Copyright Law (17 U.S.C. 108) and the Guidelines for the Proviso of Subsection 108(g)(2) from the National Commission on New Technological Uses of Copyrighted Works.
Course Packs and Electronic Reserves
An institution that has an active site license may link to or display discrete items of content from the subscribed products in course management systems via a secure network in connection with course instruction. Authorized users may be either on campus or remote.

For printed or digital course packs, institutions in the United States can obtain permission by contacting the Copyright Clearance Center (CCC) in Danvers, Massachusetts. Institutions outside the United States should contact the appropriate Reproduction Rights Organization in their home country.

Persistent URLs
URLs for content on and are persistent and can be bookmarked.
Journal Citation Report Categories
The New England Journal of Medicine is listed under the Medicine, General and Internal category.
Journal Impact Factor

The NEJM 2021 Journal Impact Factor is 176.079, making NEJM a top-ranking medical journal in the general medicine category. [Source: 2021 Journal Impact Factor, Journal Citation Reports (Clarivate, 2022)]

Issue Frequency
NEJM has 52 weekly cycles of publication. The date printed on the cover of the New England Journal of Medicine is the Thursday of each week. is updated each Wednesday at 5pm ET. Online First articles are published continuously.

NEJM Catalyst Innovations in Care Delivery has 12 issues per year; content is published continuously online.

NEJM Journal Watch Online includes 52 weeks of continuously published content.

Annual Printed Pages
The New England Journal of Medicine prints an average of 4,992 pages per year.
Content in CrossRef
The New England Journal of Medicine deposits content into CrossRef. The date and volume of the first deposit into CrossRef is 2001, Vol. 344.

NEJM Catalyst Innovations in Care Delivery deposits content into CrossRef.  The date and volume of the first deposit into CrossRef is 2020, Vol. 01.

NEJM Journal Watch does not deposit any content into CrossRef.

DOI Prefix/Publisher ID
10.1056 (NEJM and NEJM Catalyst)
Range of Content Online All content dating back to January 1945 is available as HTML. Content from 1812-1944 is available in searchable PDF format with HTML tables of content for each issue. All content dating back to January 2020 is available as HTML. All content back to July 1987 is available as HTML.

Text and Data Mining

The New England Journal of Medicine supports text and data mining efforts by our site license customers for non-commercial purposes.  Customers may request a content feed from the publisher, subject to fees and a separate contract addendum. Full-text XML files are available in NLM XML prior to 2018 and JATS XML post-2018.  Delivery is only available to a client-supplied site via SFTP protocol.

Customers may also use PubMed Central’s FTP service to download a limited number of full-text articles from the New England Journal of Medicine.  More information about this service can be found through this link. [link to]

Diversity, Equity, and Inclusion

The Massachusetts Medical Society (MMS), parent organization of NEJM Group, has had a longstanding commitment to diversity, equity, and inclusion. That said, like many organizations, we recognize that we have a long way to go. We are moving forward with a renewed sense of urgency and sustained, long-term resolve to advance the principles of diversity, equity, and inclusion across our organization.

We have established a goal to proactively work to eliminate racism, promote equality for all, and increase diversity and inclusion across every facet of our business as a medical society, as a publisher, and as a workplace. As a publisher, we are committed to:
• increasing the diversity of our staff, authors, reviewers, editors, and editorial boards
• changing our editorial style as needed to reflect diversity and inclusion
• publishing content to eliminate systemic racism in medical education, the workplace, and delivery of care, and
• ultimately, to improve the care and lives of patients who are Black, Indigenous, and people of color