GUIDE · UPDATED NOVEMBER 2026
Health Care Proxy vs. Power of Attorney in Massachusetts
Two essential estate planning documents with different purposes and different signing rules. Here is how they compare.
The short answer
A health care proxy and a power of attorney give someone authority to act for you, but over different decisions. A Massachusetts health care proxy appoints a health care agent to make medical decisions if you are unable to make them yourself. A durable power of attorney appoints an agent to handle financial and legal matters, such as banking, property and bills. Most estate plans include both. They have different signing requirements: a health care proxy needs two adult witnesses, while a power of attorney is typically notarized.
Side by side
| Health care proxy | Durable power of attorney | |
|---|---|---|
| Covers | Medical and health care decisions | Financial, property and legal matters |
| Takes effect | When a doctor determines you lack capacity to make health care decisions | Usually when signed, or on a future event if the document says so |
| Massachusetts law | M.G.L. c. 201D | M.G.L. c. 190B, Article V |
| Witnesses | Two adult witnesses, neither of whom is the health care agent | No statutory witness requirement |
| Notarization | Not required by Massachusetts law | Not required by statute, but expected by banks and required for recording real estate documents |
| Survives incapacity | Yes, that is its purpose | Yes, if it is durable |
The Massachusetts health care proxy
Under M.G.L. c. 201D, any competent adult can appoint a health care agent. The proxy must be signed by you, or by another person at your direction and in your presence, in the presence of two adult witnesses who also sign. Your health care agent cannot serve as a witness. The agent's authority begins only when your attending physician determines that you lack the capacity to make or communicate health care decisions. Massachusetts does not have a living will statute, so many people pair the proxy with written instructions for their agent.
Need a signing at the hospital?
We come to patients across Greater Boston, often the same day.
The durable power of attorney
A durable power of attorney stays in effect if you become incapacitated, which is what makes it useful in estate planning. Massachusetts law does not require witnesses or notarization for a power of attorney to be valid. In practice, banks, brokerages and the Registry of Deeds expect a notarized power of attorney: a power of attorney used to sign a deed must be acknowledged before a notary to be recorded. That is why estate planning attorneys almost always have it notarized.
Do you need both?
Usually, yes. A health care agent cannot pay your bills or manage your property, and a financial agent cannot make medical decisions for you. Without these documents, your family may need to ask the Probate and Family Court to appoint a guardian or conservator, which takes time and money. An estate planning attorney can advise on what your plan should include.
Signing at home or in the hospital
Health care proxies and powers of attorney are often needed urgently, sometimes after a hospital admission. We come to hospitals, rehabilitation centers and care facilities across Greater Boston. For a signer who cannot sign their name, Massachusetts allows a signature by mark with two witnesses. We confirm identity, capacity concerns and witness arrangements before we arrive. See Hospital & Bedside Notary and Signature by Mark.
Using a power of attorney abroad
A power of attorney for property, banking or legal matters in another country usually needs to be notarized and apostilled, and often translated. Foreign offices may require specific wording. See Powers of Attorney for Use Abroad.
Other documents often signed with them
- HIPAA authorization. Lets named people receive your medical information.
- MOLST. A medical order for life-sustaining treatment, completed with your clinician, not a notary.
- Will and trust. Govern what happens to your property after death. See Trust Documents.
- Personal care instructions. Written wishes that guide your health care agent.
Choosing your agents
Choose people you trust who can act calmly under pressure and who understand your wishes. Name alternates in case your first choice is unavailable. Give copies of your health care proxy to your agent, your doctors and your hospital. Keep the original power of attorney safe and tell your agent where it is.
Good to know
Health care proxy
Two adult witnesses; no notary required.
Power of attorney
Notarized in practice for banks and real estate.
Both durable
Both survive incapacity.
Signature by mark
Available with two witnesses.
Official sources
- M.G.L. c. 201D: health care proxies
- M.G.L. c. 190B, Article V: protection of persons and property
- Mass.gov: health care proxies and living wills
This guide summarizes Massachusetts law for general information. It is not legal advice. Consult an attorney about your estate plan.
Frequently asked questions
Does a Massachusetts health care proxy need to be notarized?
No. It needs two adult witnesses, neither of whom is the health care agent.
Does a power of attorney need to be notarized in Massachusetts?
Not by statute, but banks expect it, and it must be notarized to be recorded for real estate.
Can my health care agent also be my financial agent?
Yes. Many people appoint the same person, but each role is created by a separate document.
Can you notarize documents at the hospital?
Yes. We regularly notarize health care proxies and powers of attorney at hospitals and care facilities.
Is a health care proxy from another state valid in Massachusetts?
Massachusetts generally honors health care proxies validly executed in other states. Ask your attorney or hospital.
Does a power of attorney end at death?
Yes. After death, the personal representative named in the will, or appointed by the court, handles the estate.
Need a health care proxy or power of attorney notarized?
We come to homes, hospitals and care facilities across Greater Boston.