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Dr. Maria E. Diaz, MD
NPI1023124880PAC ID5496753964
- Medicare services, 2024
- 76
- Medicare patients, 2024
- 66
- Part D claims, 2024
- 8,395
- Publications
- 2
- Hospital affiliations
- 4
- Practice address
- 59 Lowes Way, Lowell, MA 01852
- Practice phone
- Call (978) 349-2146
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northeast Endoscopy Center - Lowell
Surgery Center - Medicare-Certified · Lowell, Massachusetts
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Dr. Maria E. Diaz is an internist in Lowell, Massachusetts
Dr. Diaz practices at Northeast Endoscopy Center - Lowell in Lowell, Massachusetts.
Dr. Diaz's NPI, 1023124880, was assigned on August 22, 2006. Dr. Diaz holds Massachusetts license 227339.
NPI and contact details
- NPI
- 1023124880NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5496753964
- NPI enumeration date
- August 22, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (978) 349-2146
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Maria E. Diaz practices at Northeast Endoscopy Center - Lowell in Lowell, Massachusetts
Dr. Diaz's primary practice is Northeast Endoscopy Center - Lowell, at 59 Lowes Way, Lowell, MA 01852. The practice phone is (978) 349-2146.
- Northeast Endoscopy Center - Lowell59 Lowes Way, Lowell, MA 01852Phone(978) 349-2146
Source: Dmand AI Affiliation Data
Dr. Maria E. Diaz is affiliated with 8 sites of care and 1 medical group
Dr. Diaz's primary practice is Northeast Endoscopy Center - Lowell in Lowell, Massachusetts. Dr. Diaz is also affiliated with Lahey Clinic. The medical group on file is Greater Lawrence Family Health Center. Dmand AI also links Dr. Diaz to 3 more hospitals, 1 behavioral health center, 1 community health center and 1 home health agency, each named with a free account.
Northeast Endoscopy Center - LowellPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Maria E. Diaz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Diaz practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northeast Endoscopy Center - Lowell | Available with a free account |
| +7 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Maria E. Diaz is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Diaz's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Diaz is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Diaz
Counts of internists 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 E. Diaz billed Medicare for 76 services in 2024
CMS data shows 76 Medicare services from Dr. Diaz across 2 procedure codes in 2024, for 66 Medicare patients. Medicare paid $2,743 for them.
Medicare services, 202476
Medicare patients66
Paid by Medicare$2,743
Procedure codes2
Dr. Diaz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 982024: 4356%
- Lab and pathology
- 2023: 452024: 3327%
Where Dr. Diaz's Medicare services took place, 2024
- In an office3343%
- In a facility4357%
Dr. Diaz compared with the Massachusetts median for internists, 2024
- Dr. Diaz
- Massachusetts median
- Medicare services
- 76vs 43182% below
- Medicare patients
- 66vs 19466% below
- Part D claims
- 7,753vs 40219.3 times
Medians across 5,369 internists in Massachusetts 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 E. Diaz treated 66 Medicare patients in 2024, average age 69
CMS counts 66 Medicare patients who saw Dr. Diaz in 2024. The largest group is 65 to 74, with 31 patients. 75% of them have high blood pressure, and 74% have diabetes. Their average risk score is 2.04, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Diaz's median patient age at 63, with 67% women.
Medicare patients, 202466
Average age69
Average risk score2.04
Dr. Diaz's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Diaz's Medicare patients by sex, 2024
- Women4264%
- Men2436%
Chronic conditions among Dr. Diaz's Medicare patients, 2024
- High blood pressure75%
- Diabetes74%
- High cholesterol68%
- Arthritis38%
- Mood disorders38%
- Anxiety35%
- Depression35%
- Chronic kidney disease29%
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 63
Patient panel by sex, all payers
- Women67%
- Men32%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Maria E. Diaz wrote 8,395 Medicare Part D claims in 2024
In 2024, Dr. Diaz wrote 8,395 Medicare Part D claims for 451 patients. 79% of them were for generic drugs. CMS names the drug for 7,753 of them, across 109 drugs with 11 or more claims each, at $1,063,875 in total drug cost. In 2023, CMS named 7,516 claims across 116 drugs.
Part D claims, 20248,395
Drugs named by CMS109
Total drug cost$1.1M
Part D patients451
Dr. Diaz's Part D claims by kind of drug, 2024
- Generic6,605 claims79%
- Brand-name1,497 claims18%
- Other293 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
- Opioids1%103 of 8,395 claims
- Antibiotics1%50 of 8,395 claims
- Antipsychotics, patients 65 and over1%50 of 8,395 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: 7,5162024: 7,7533%
Drugs named by CMS: 109 in 2024, 116 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 E. 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 E. Diaz has 2 publications on record
Dmand AI links 2 papers to Dr. Diaz, published from 2017 to 2019.
Papers2
Years published2017 to 2019
Recent publications by Dr. Diaz
See who Dr. Diaz researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Diaz works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Sources for Dr. Maria E. 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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 E. Diaz
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Maria E. Diaz's NPI number?
Dr. Maria E. Diaz's NPI number is 1023124880. It was assigned on August 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Maria E. Diaz?
Dr. Maria E. Diaz is an internist in Lowell, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Maria E. Diaz practice?
Dr. Diaz practices at 59 Lowes Way, Lowell, MA 01852. Dr. Diaz's primary practice is Northeast Endoscopy Center - Lowell in Lowell, Massachusetts. Dmand AI also links Dr. Diaz to 3 hospitals, 1 behavioral health center, 1 community health center and 1 home health agency.
What is Dr. Maria E. Diaz's office phone number?
The practice phone on file for Dr. Diaz is (978) 349-2146.
What is Dr. Maria E. Diaz's medical license number?
Dr. Diaz holds Massachusetts license 227339.
Which hospitals is Dr. Maria E. Diaz affiliated with?
Dr. Diaz is affiliated with Lahey Clinic. Dmand AI links Dr. Diaz to 3 more hospitals.
What medical group is Dr. Maria E. Diaz part of?
Dr. Diaz is linked to Greater Lawrence Family Health Center.
Does Dr. Maria E. Diaz accept Medicare?
Yes. CMS data shows Dr. Diaz billed Medicare for 76 services in 2024, and Dr. Diaz accepts Medicare assignment.
How many Medicare patients does Dr. Maria E. Diaz see?
CMS counts 66 Medicare patients who saw Dr. Diaz in 2024, with an average age of 69.
What services does Dr. Maria E. Diaz bill to Medicare?
In 2024, Dr. Diaz's most billed Medicare services were hospital inpatient care (99232) and lab and pathology test (83037).
Show 3 more questionsShow fewer questions
What drugs does Dr. Maria E. Diaz prescribe most?
In 2024 Medicare Part D data, Dr. Diaz's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Lisinopril.
How long has Dr. Maria E. Diaz been practicing?
Dr. Diaz graduated from medical school in 1999, 27 years ago.
Does Dr. Maria E. Diaz do research?
Dmand AI links 2 publications to Dr. Diaz, published from 2017 to 2019.
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