Dr. Maria Michelle Diaz, MD
- Medicare services, 2024
- 260
- Medicare patients, 2024
- 236
- Part D claims, 2024
- 131
- Hospital affiliations
- 6
- Medical groups
- 11
- Practice address
- 15 Hospital Drive, York, ME 03909
- Practice phone
- Call (207) 351-2478
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Maria Michelle Diaz is an emergency medicine physician in York, Maine
Dr. Diaz practices at York Hospital in York, Maine, part of MaineHealth.
Dr. Diaz's NPI, 1013142959, was assigned on May 21, 2009. Dr. Diaz graduated from Albert Einstein College of Medicine of Yeshiva University in 2006. Dr. Diaz holds New Hampshire license LT3226.
- NPI
- 1013142959NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254523988
- NPI enumeration date
- May 21, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (207) 351-2478
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Maria Michelle Diaz practices at York Hospital in York, Maine
Dr. Diaz's primary practice is York Hospital, at 15 Hospital Drive, York, ME 03909 in York County. The practice phone is (207) 351-2478.
- York Hospital15 Hospital Drive, York, ME 03909 · York CountyPhone(207) 351-2478
Source: Dmand AI Affiliation Data
Dr. Maria Michelle Diaz is affiliated with 6 sites of care and 11 medical groups
Dr. Diaz's primary practice is York Hospital in York, Maine, part of MaineHealth. Dr. Diaz is also affiliated with Catholic Medical Center. The medical group on file is York Hospital. Dmand AI also links Dr. Diaz to 4 more hospitals and 10 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Maria Michelle Diaz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Diaz practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| York Hospital | Available with a free account |
| +5 more sites and 10 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Maria Michelle Diaz is one of 410 emergency medicine physicians in Maine
Emergency medicine is Dr. Diaz's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Diaz is licensed in New Hampshire.
Specialties and state licenses
- Emergency medicine, New HampshirePrimary
Emergency medicine physicians near Dr. Diaz
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Maria Michelle Diaz billed Medicare for 260 services in 2024
CMS data shows 260 Medicare services from Dr. Diaz across 3 procedure codes in 2024, for 236 Medicare patients. Medicare paid $24,133 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Diaz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2482024: 2605%
Dr. Diaz compared with the Maine median for emergency medicine physicians, 2024
- Dr. Diaz
- Maine median
- Medicare services
- 260vs 18441% above
- Medicare patients
- 236vs 19521% above
- Part D claims
- 49vs 5816% below
Medians across 426 emergency medicine physicians in Maine with Dmand AI profiles that report each measure.
Dr. Diaz's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Maria Michelle Diaz treated 236 Medicare patients in 2024, average age 72
CMS counts 236 Medicare patients who saw Dr. Diaz in 2024. The largest group is 75 to 84, with 84 patients. 72% of them have high blood pressure, and 56% have high cholesterol. 36% are also on Medicaid. Their average risk score is 1.45, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Diaz's median patient age at 55, with 57% women.
Dr. Diaz's Medicare patients by age, 2024
Dr. Diaz's Medicare patients by sex, 2024
- Women12453%
- Men11247%
Chronic conditions among Dr. Diaz's Medicare patients, 2024
- High blood pressure72%
- High cholesterol56%
- Arthritis47%
- Mood disorders42%
- Anxiety40%
- Depression37%
- Ischemic heart disease31%
- Atrial fibrillation29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Diaz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Maria Michelle Diaz wrote 131 Medicare Part D claims in 2024
In 2024, Dr. Diaz wrote 131 Medicare Part D claims for 93 patients. 97% of them were for generic drugs. CMS names the drug for 49 of them, across 3 drugs with 11 or more claims each, at $277 in total drug cost. In 2023, CMS named 25 claims across 2 drugs.
Dr. Diaz's Part D claims by kind of drug, 2024
- Generic127 claims97%
- Brand-name and other4 claims3%
Dr. Diaz's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Diaz's Part D claims, 2024
- Opioids14%18 of 131 claims
- Antibiotics45%59 of 131 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 252024: 4996%
Drugs named by CMS: 3 in 2024, 2 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Maria Michelle Diaz takes part in Medicare
Dr. Diaz accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Maria Michelle Diaz graduated from Albert Einstein College of Medicine of Yeshiva University
Dr. Diaz graduated from Albert Einstein College of Medicine of Yeshiva University in 2006.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Maria Michelle Diaz's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Maria Michelle Diaz
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What is Dr. Maria Michelle Diaz's NPI number?
Dr. Maria Michelle Diaz's NPI number is 1013142959. It was assigned on May 21, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Maria Michelle Diaz?
Dr. Maria Michelle Diaz is an emergency medicine physician in York, Maine. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Maria Michelle Diaz practice?
Dr. Diaz practices at 15 Hospital Drive, York, ME 03909. Dr. Diaz's primary practice is York Hospital in York, Maine, part of MaineHealth. Dmand AI also links Dr. Diaz to 4 hospitals and 10 medical groups.
What is Dr. Maria Michelle Diaz's office phone number?
The practice phone on file for Dr. Diaz is (207) 351-2478.
What is Dr. Maria Michelle Diaz's medical license number?
Dr. Diaz holds New Hampshire license LT3226.
Which hospitals is Dr. Maria Michelle Diaz affiliated with?
Dr. Diaz practices at York Hospital in York, Maine. Dr. Diaz is also affiliated with Catholic Medical Center. Dmand AI links Dr. Diaz to 4 more hospitals.
What medical group is Dr. Maria Michelle Diaz part of?
Dr. Diaz is linked to York Hospital. Dmand AI links Dr. Diaz to 10 more medical groups.
Does Dr. Maria Michelle Diaz accept Medicare?
Yes. CMS data shows Dr. Diaz billed Medicare for 260 services in 2024, and Dr. Diaz accepts Medicare assignment.
How many Medicare patients does Dr. Maria Michelle Diaz see?
CMS counts 236 Medicare patients who saw Dr. Diaz in 2024, with an average age of 72.
What services does Dr. Maria Michelle Diaz bill to Medicare?
In 2024, Dr. Diaz's most billed Medicare services were emergency department visit (99284), emergency department visit (99285) and emergency department visit (99283).
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Where did Dr. Maria Michelle Diaz go to medical school?
Dr. Diaz graduated from Albert Einstein College of Medicine of Yeshiva University in 2006.
What drugs does Dr. Maria Michelle Diaz prescribe most?
In 2024 Medicare Part D data, Dr. Diaz's most prescribed drugs by claims were Cephalexin, Prednisone and Oxycodone-Acetaminophen.
How long has Dr. Maria Michelle Diaz been practicing?
Dr. Diaz graduated from medical school in 2006, 20 years ago.
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