Maria E. Diaz, M.D.
Internal Medicine Physician · Lawrence, MA
Maria E. Diaz, M.D. is an internal medicine physician with a practice address in Lawrence, Massachusetts, and NPI 1023124880, issued on Aug 22, 2006. Check the license (Massachusetts 227339, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Maria E. Diaz
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 227339 MA
Self-reported in NPPES; status is on the state search - Practice location
- 150 Park St, Lawrence, MA 01841
- Phone
- (978) 685-1770
- Enumerated
- Aug 22, 2006
- Record last updated
- Nov 4, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (978) 682-5787
- Medicare enrollment
- Enrolled (PECOS I20061116000226); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 150 Park St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Innokentiy Bakaev, M.D.Family Medicine Physician1942430608
- Amanda Blanch HouseCommunity Health Registered Nurse1992311948
- Tanya Campus, M.D.Geriatric Medicine (Family Medicine) Physician1932175049
Verify Maria E. Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 227339Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average internal medicine physician in 2024
8,395 Medicare Part D claims for 451 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 103 claims were for opioids.
Most prescribed
- Atorvastatin Calcium735 claims
- Amlodipine Besylate460 claims
- Lisinopril423 claims
- Metformin Hcl326 claims
- Trulicity277 claims
- Hydrochlorothiazide263 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Greater Lawrence Family Health Center IncLawrence, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maria E. Diaz among 6,825 internal medicine physician records in Massachusetts
Maria E. Diaz, M.D. is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1999 · median 2004 among the 4,103 with a school on file
- Record last updated2015 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
32 internal medicine physician records list a practice address in Lawrence
They are 32 of the 2,264 NPPES records with a practice address in Lawrence, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Lawrence → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jose Baez, DOLawrence, MA 018411336103233
- Ricardo Camacho Vargas, MDLawrence, MA 018411619462157
- Sandra Cardenas Villa, MDLawrence, MA 018411770642142
- Madhuri Chandnani, M.D.Lawrence, MA 018411699172585
- Marwa El Sabbahy, M.D.Lawrence, MA 018411275897563
- Torkom Garabedian, M.D.Lawrence, MA 018411063852127
- Astrid Gutierrez, MDLawrence, MA 018411295900983
- Valmeek Kudesia, M.D.Lawrence, MA 018411700046398
Common questions
What is Maria E. Diaz, M.D.'s NPI number?
Maria E. Diaz, M.D.'s National Provider Identifier (NPI) is 1023124880, issued on Aug 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Maria E. Diaz, M.D. located?
The NPPES record lists a practice address at 150 Park St, Lawrence, MA, 01841. Phone: (978) 685-1770. Providers update this record themselves, so call before visiting.
How can I verify Maria E. Diaz, M.D.'s license?
NPPES lists Massachusetts license number 227339, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Maria E. Diaz, M.D. prescribe under Medicare Part D?
In 2024, Maria E. Diaz, M.D. had 8,395 Medicare Part D claims for 451 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.