How to fax a referral to a specialist so it gets scheduled

Fax a referral with the clinical question, the supporting records (prior treatments, related imaging or tests), the urgency and the role you ask of the specialist. HIPAA lets a covered provider send it for the specialist's treatment without the patient's authorization (45 CFR 164.506(c)(2)), psychotherapy notes aside.

What should a referral fax include so the specialist can schedule it?

A referral fax the specialist's office can schedule from states the clinical question, supplies the supporting data and the urgency, and defines the specialist's role. CMS's guidance on managing referrals calls the first three a high value referral request and the last defining the specialty role.

1. State the clinical question you are asking the specialist.
2. Attach the supporting data: prior treatments and related imaging or tests.
3. Give the urgency of the referral.
4. Say what you ask of the specialist: evaluate the patient, perform a procedure, or take over care until the patient is stable.
5. Add the patient's insurance details when the receiving office asks for them. Many offices do, and that is common practice rather than a rule.
6. Confirm the specialist's fax number with the specialist's office before sending. How to find a doctor's fax number in the NPI Registry shows one way to look it up.
7. Send the referral as one fax with a cover sheet.
8. File the delivery record with the referral.

CMS tells specialty practices to review each new referral promptly for the same three things: a clear clinical question, supporting data on hand and an accurate urgency.

Can a doctor fax a referral without the patient's authorization?

Yes: a doctor who is a HIPAA covered entity may fax a referral to another provider without the patient's consent or authorization, because HIPAA defines treatment to include the referral of a patient from one provider to another (45 CFR 164.501) and lets a covered entity disclose protected health information for another provider's treatment, by fax among other ways (45 CFR 164.506(c)(2)).

A disclosure to a provider for treatment is exempt from the minimum necessary standard (45 CFR 164.502(b)(2)(i)), so the referral carries what the specialist needs to act. Psychotherapy notes are the exception. HIPAA requires an authorization for any use or disclosure of them except a short list, and the list's treatment item is use by the originator of the notes (45 CFR 164.508(a)(2)). Substance use disorder records have a rule of their own, covered in Can you fax substance use disorder records?

In the example in HHS's treatment fact sheet, the provider who sends the information answers for sending it securely and for reasonable steps toward the right address, and the provider who receives it answers for safeguarding it from then on. A therapist's letter to a client's primary care doctor is the same treatment disclosure, and a doula who refers a client to pelvic-floor physical therapy or an obstetric clinician sends the same elements: the question, the supporting records and the urgency.

Does the patient's plan require a referral?

Original Medicare needs no referral to see a specialist in most cases, a Medicare Advantage HMO needs one in most cases, and Medicaid managed care plans give some enrollees direct access to a specialist.

The table shows, for each coverage type or order, whether a referral or an order is needed and the official source.

Medicare.gov says that in most cases a person with Original Medicare does not need a referral to see a specialist. The Medicare.gov HMO page says that in most cases a member has to get a referral to use a specialist, and that certain services, like yearly mammogram screenings, need none. CMS's July 2026 fact sheet says Medicare Advantage HMO plans, unlike other Medicare Advantage plan types, require a referral from the patient's doctor to visit a specialist.

Medicaid managed care plans must let enrollees with special health care needs who need a course of treatment or regular care monitoring directly access a specialist, for example through a standing referral or an approved number of visits (42 CFR 438.208). They must give female enrollees direct access to a women's health specialist in the network for routine and preventive women's health care (42 CFR 438.206).

Programs outside Medicare and Medicaid set their own referral steps. VA community care takes a Request for Service with the records, covered in VA community care by fax: Request for Service, renewals and records, and TRICARE East has its own referral process.

When is it an order instead of a referral?

Imaging, clinical laboratory services, durable medical equipment, prosthetics, orthotics and supplies (DMEPOS), home health and hospice are ordered rather than referred, and Medicare pays for them only on a claim that carries the ordering or certifying practitioner's legal name and NPI (42 CFR 424.507).

The rule is a claims rule for the provider or supplier that bills the ordered service. The ordering physician or eligible professional must also be enrolled in Medicare in an approved status or have validly opted out of Medicare. For home health, the ordering or certifying practitioner can also be a physician assistant, nurse practitioner or clinical nurse specialist working under state law, identified the same way. An order that carries the practitioner's legal name and NPI gives the billing provider the two identifiers its claim must carry.

How do you know the specialist received the referral and acted on it?

A referring practice knows the specialist acted when it closes the referral loop: CMS's guidance says the practice should receive either a referral note or notice that the patient did not show or canceled.

The specialist's reply should say what the specialist will do, what the referring clinician needs to do and what the specialist instructed the patient to do. The fax's delivery record shows the pages reached the specialist's number, and How to tell if a fax went through lists the five facts that record should carry. The reply, whether a referral note or a no-show notice, shows the office acted.

How do you send referrals securely and get the specialist's reply?

A practice sends referrals securely from a HIPAA fax service that signs a BAA, using the practice's own number, so the specialist's referral note or no-show notice can come back by fax to the line the referral left from. Fax Pigeon signs the BAA at signup on every plan and sends from the practice's own number on every paid plan, and every delivered fax gets delivery proof to file with the referral. A cover sheet is optional, and a shared inbox with roles and assignment puts each specialist's reply in front of the person tracking that referral.

* Fax Pigeon prices and plan terms as of October 26, 2026. Outside sources were read on October 26, 2026.