Does a Physician Have to Co-Sign an NP's Notes and Orders?

Does any federal rule require a physician to co-sign?

No. Medicare's coverage rule for nurse practitioner services attaches one physician-relationship condition: the NP performs them while working in collaboration with a physician. The same section then says the collaborating physician does not need to be present when the services are furnished or to make an independent evaluation of each patient the NP sees 1Ref 1Office of the Federal Register / Centers for Medicare & Medicaid Services (2026).§ 410.75 Nurse practitioners' services..The Medicare Part B coverage conditions for nurse practitioner services: the collaboration condition, the statement that the collaborating physician need not be present or independently evaluate each patient, and paragraph (f) allowing the NP to review and verify rather than re-document notes made by others.. A second signature appears nowhere in it.

The signature Medicare does want belongs to whoever wrote the entry. The agency's signature guidance describes it as the mark the ordering or prescribing physician or non-physician practitioner makes on a document, signifying knowledge, approval, acceptance or obligation 2Ref 2Centers for Medicare & Medicaid Services (2023).Complying with Medicare Signature Requirements.Whose signature Medicare medical review looks for on a note or an order, the ordering or prescribing physician or non-physician practitioner, and the attestation and signature-log cures for a missing or illegible signature.. A nurse practitioner is a non-physician practitioner, so the note the NP authored is authenticated the moment the NP signs and dates it.

But the federal rule does more than stay silent about co-signature.

Paragraph (f) of that same section runs the signature in the other direction. For NP services the nurse practitioner may review and verify, meaning sign and date, rather than re-document, notes in a patient's medical record made by physicians, residents, nurses, students and other members of the medical team 1Ref 1Office of the Federal Register / Centers for Medicare & Medicaid Services (2026).§ 410.75 Nurse practitioners' services..The Medicare Part B coverage conditions for nurse practitioner services: the collaboration condition, the statement that the collaborating physician need not be present or independently evaluate each patient, and paragraph (f) allowing the NP to review and verify rather than re-document notes made by others.. Medicare's remedy for a missing or illegible signature stays with the author too: an attestation from the practitioner who provided the service, or a signature log establishing the mark 2Ref 2Centers for Medicare & Medicaid Services (2023).Complying with Medicare Signature Requirements.Whose signature Medicare medical review looks for on a note or an order, the ordering or prescribing physician or non-physician practitioner, and the attestation and signature-log cures for a missing or illegible signature..

All of that is Medicare's rule, and Medicare is a payer. A licensure rule is a different instrument, written by your state, and it is the only place a co-signature requirement can come from.

Where the co-signature belief comes from

From incident-to billing, which is a rule about supervision and money. Under 42 CFR 410.26, services and supplies furnished incident to a physician's professional services must in general be furnished under the direct supervision of the physician or other practitioner, with designated care-management and behavioral-health services allowed under general supervision, and only the supervising physician or practitioner may bill them 3Ref 3Office of the Federal Register (2026).42 CFR 410.26 — Services and supplies incident to a physician's professional services.That incident-to is a supervision and billing condition: services must in general be furnished under direct supervision, with designated care-management and behavioral-health services under general supervision, and only the supervising physician or practitioner bills them..

Read that closely and the confusion resolves. The condition is presence, defined the way the regulation defines it, and the consequence is whose number goes on the claim. A signature written afterwards supplies no supervision that was absent at the time.

A solo NP with no physician on site is not billing incident-to at all, which settles the claim question somewhere else entirely. That is the territory of the Medicare 85% rule for NPs, the thing to read next if the billing side is what is being asked.

Your state board is where the answer lives

In state licensure law. It is the only instrument that can require a co-signature, and it answers differently in different states. Some boards publish the answer outright. New York's Office of the Professions states that Education Law does not require a physician to supervise the nurse practitioner or co-sign any of the nurse practitioner's records or charts 4Ref 4New York State Education Department, Office of the Professions (2026).Practice Information for Nurse Practitioners.New York only: the board's own statement that Education Law does not require a physician to supervise the NP or co-sign the NP's records or charts, and the written practice agreement requirement below more than 3,600 hours of qualifying experience.. That is New York's answer and it is nobody else's.

The lookup has three steps. Start at your state's nurse practice act and your board of nursing's own practice guidance, searching the name your state gives the document: written practice agreement in New York 4Ref 4New York State Education Department, Office of the Professions (2026).Practice Information for Nurse Practitioners.New York only: the board's own statement that Education Law does not require a physician to supervise the NP or co-sign the NP's records or charts, and the written practice agreement requirement below more than 3,600 hours of qualifying experience., standard care arrangement in Ohio 5Ref 5Ohio General Assembly (2026).Section 4723.431 | Standard care arrangements..Ohio only: that an APRN practices under a standard care arrangement entered into with each collaborating physician, and the cap barring a physician from collaborating at the same time with more than five nurses in the prescribing component., nurse protocol agreement in Georgia 6Ref 6Georgia Composite Medical Board (2026).Chapter 360-32 NURSE PROTOCOL AGREEMENTS PURSUANT TO O.C.G.A. SECTION 43-34-25.Georgia only: the delegating physician's duties under a nurse protocol agreement, at least one documented direct onsite observation a year and a quarterly review of medical records that may be conducted via telecommunications, and that the chapter sits with the Composite Medical Board., collaborative practice agreement in many others. Then check the medical board as well, because in some states the physician's half of the duty is written there; Georgia's protocol chapter sits with the Composite Medical Board 6Ref 6Georgia Composite Medical Board (2026).Chapter 360-32 NURSE PROTOCOL AGREEMENTS PURSUANT TO O.C.G.A. SECTION 43-34-25.Georgia only: the delegating physician's duties under a nurse protocol agreement, at least one documented direct onsite observation a year and a quarterly review of medical records that may be conducted via telecommunications, and that the chapter sits with the Composite Medical Board.. Then read the rule for its verb. Sign, review, observe and consult are four different duties, and only the first one is a co-signature.

If the rule requires an agreement and no physician has signed one yet, finding a collaborating physician independently is the problem to solve first.

Three states, three different duties

None of these three asks for a signature on every note. Two of them require a review cadence instead, written into a document the state names, while New York requires neither supervision of the nurse practitioner nor co-signature of the chart. The shapes are what to take from this table, because no state's rule crosses a state line.

New York's requirement has a ceiling. The written practice agreement and protocols are required unless or until the NP completes more than 3,600 hours of qualifying nurse practitioner experience, after which the NP is authorized to practice independently 4Ref 4New York State Education Department, Office of the Professions (2026).Practice Information for Nurse Practitioners.New York only: the board's own statement that Education Law does not require a physician to supervise the NP or co-sign the NP's records or charts, and the written practice agreement requirement below more than 3,600 hours of qualifying experience.. Ohio's constraint runs at the collaborator instead: a physician may not collaborate at the same time with more than five nurses in the prescribing component 5Ref 5Ohio General Assembly (2026).Section 4723.431 | Standard care arrangements..Ohio only: that an APRN practices under a standard care arrangement entered into with each collaborating physician, and the cap barring a physician from collaborating at the same time with more than five nurses in the prescribing component..

Ohio's review may be carried out by a collaborating physician, a podiatrist or a designated member of a quality assurance committee 7Ref 7Ohio Board of Nursing (2026).Rule 4723-8-05 | Quality assurance standards..Ohio only: that the quality assurance a CNP party to a standard care arrangement must participate in is periodic random chart review at least annually by a collaborating physician, podiatrist or a designated quality assurance committee member, with its 2026 effective date.. In either state, a physician meeting the duty is reading a sample of charts after the fact.

But three states are not a national rule. No fifty-state tally of co-signature requirements exists in a form worth quoting here, so read these three as worked examples of the shapes a rule takes, then go and read your own.

Who signs orders

The practitioner who ordered it. Medicare's signature guidance treats the signature as the mark the ordering or prescribing physician or non-physician practitioner makes on a document, signifying knowledge, approval, acceptance or obligation 2Ref 2Centers for Medicare & Medicaid Services (2023).Complying with Medicare Signature Requirements.Whose signature Medicare medical review looks for on a note or an order, the ordering or prescribing physician or non-physician practitioner, and the attestation and signature-log cures for a missing or illegible signature.. A nurse practitioner sits inside that phrase, so an order the NP wrote is authenticated by the NP's own signature and date, handwritten or electronic.

Individual order types are where the exceptions sit, and they are exceptions about who may certify a particular form. NP certification of DME and hospice turns on the federal condition attached to each of those. Some states also attach physician involvement to particular categories of prescribing, which is why buprenorphine prescribing with required physician involvement gets asked as its own question.

When the requirement is somebody's policy

Then it is negotiable, and finding out whether a demand is law or policy comes before rearranging a workflow around it. A co-signature demand reaches a solo NP from four places: the state licensure rule, a facility or payer contract, a form's signature line, and an electronic record configured with a co-signature queue. Only the first is law.

Ask for the source in one sentence: which rule, contract clause or form requires this signature. A licensure rule comes back with a citation, a contract with a clause number, a template with the name of whoever administers it. A demand that comes back with none of the three is worth pressing on before it becomes the way the practice runs.

In states that do require an agreement, this is also what your collaborating physician's monthly fee is buying: review time on the cadence the rule sets. A countersignature on every encounter is a different service, and it is worth knowing which the fee covers before renewing.

How you identify yourself to patients, including required not-a-physician signage, runs on its own state rules about titles and disclosure. It is a different obligation from who signs the chart, and satisfying one says nothing about the other.

Settle it for your own practice

One sitting produces an answer that holds until your state amends its rules. Pull the rule text, name the document your state uses, put the review cadence on a calendar instead of in memory, and attribute every non-licensure co-signature demand to the contract or configuration it came from.

• Retrieve the nurse practice act section and your board's practice guidance, save both as PDFs, and date each file. These rules move: Ohio's quality assurance standard carries a 2026 effective date 7Ref 7Ohio Board of Nursing (2026).Rule 4723-8-05 | Quality assurance standards..Ohio only: that the quality assurance a CNP party to a standard care arrangement must participate in is periodic random chart review at least annually by a collaborating physician, podiatrist or a designated quality assurance committee member, with its 2026 effective date..
• Name the regime. Written practice agreement, standard care arrangement, nurse protocol agreement and collaborative practice agreement carry different duties, and searching the wrong term returns nothing.
• Calendar the cadence the rule sets, on the physician's calendar as well as your own. A quarterly review performed in month eleven is a documented lapse of the duty.
• Log where each co-signature demand came from, one line each. The ones that trace to a template or a contract are the ones somebody has the authority to change.
• Where the rule is genuinely ambiguous about whether a signature is required, that ambiguity is what a health care attorney licensed in your state answers in a short engagement. A board's own practice guidance is the cheaper first stop, and New York's answers the question in as many words 4Ref 4New York State Education Department, Office of the Professions (2026).Practice Information for Nurse Practitioners.New York only: the board's own statement that Education Law does not require a physician to supervise the NP or co-sign the NP's records or charts, and the written practice agreement requirement below more than 3,600 hours of qualifying experience..