Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Andrew Mel Diaz, DO

Individual provider Internal Medicine Physician · NPI 1255951786

Dr. Andrew Mel Diaz, DO is a Hospitalist in Huntley, Illinois. Graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 2020, 6 years ago. Practices with Northwestern Medical Faculty Foundation, a 4,394-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
6
Trained at
At Still University of Health Sciences, College of Osteo Med, Kirksville
Licensed in
IL
In the registry since
2020
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

10400 Haligus Rd
Huntley, IL 60142-9553
Phone: (815) 759-4323
Fax: (815) 759-4948
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 530 Ne Glen Oak Ave, Peoria, IL 61637-0001 — (309) 655-2000

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036164669 (IL)

Record details

NPI number1255951786
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 24, 2020
Last updated in NPPESApril 16, 2026
Certification dateApril 16, 2026
Mailing address530 Ne Glen Oak Ave Bldg 5676, Peoria, IL 61637-0001

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Medical schoolAT STILL UNIVERSITY OF HEALTH SCIENCES, COLLEGE OF OSTEO MED, KIRKSVILLE
Graduated 2020 (6 years in practice)
Group practice Northwestern Medical Faculty Foundation — 4394 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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