Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Maria E Diaz, MD

Individual provider Internal Medicine Physician · NPI 1023124880

Maria E Diaz, MD practises Internal Medicine in Lawrence, Massachusetts. Qualified in 1999, 27 years ago. Practices with Greater Lawrence Family Health Center Inc, a 118-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
27
Licensed in
MA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

150 Park St
Lawrence, MA 01841-2517 Not confirmed with CMS for 10 years — call before visiting
Phone: (978) 685-1770
Fax: (978) 682-5787
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 227339 (MA)

Record details

NPI number1023124880
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 22, 2006
Last updated in NPPESNovember 4, 2015

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1999 (27 years in practice)
Group practice Greater Lawrence Family Health Center Inc — 118 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients66
Services billed 105 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Greater Lawrence Family Health Center Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 118 clinicians in the practice; 12 are shown here.

Other providers in Lawrence