Andrew Diaz, DO
Internal Medicine Physician · Huntley, IL
Andrew Diaz, DO is an internal medicine physician with a practice address in Huntley, Illinois, and NPI 1255951786, issued on Apr 24, 2020. Check the license (Illinois 036164669, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Andrew Diaz
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036164669 IL
Self-reported in NPPES; status is on the state search - Practice location
- 10400 Haligus RD, Huntley, IL 60142
- Phone
- (815) 759-4323
- Enumerated
- Apr 24, 2020
- Entity
- Type 1 · individual
Also registered at 10400 Haligus RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nnamdi AmiloAnesthesiology Physician1487283875
- Ilan Bornstein, MDObstetrics & Gynecology Physician1083647747
- Megan Carey, MS, RD, LDNRegistered Dietitian1578958187
- Firaz ChaudhryHospitalist Physician1588195531
- Stuart Cohen, MDAnesthesiology Physician1043261449
- Heather Eslinger, MDStudent in an Organized Health Care Education/Training Program1326506080
Verify Andrew Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036164669Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
86% fewer Medicare Part D claims than the average internal medicine physician in 2024
378 Medicare Part D claims for 175 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 26 claims were for opioids.
Most prescribed
- Atorvastatin Calcium30 claims
- Eliquis30 claims
- Cephalexin27 claims
- Amlodipine Besylate17 claims
- Pantoprazole Sodium17 claims
- Hydrocodone-Acetaminophen16 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.
The Medicare quality score for 2023: 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
One hospital or facility affiliation
- Northwestern Medical Faculty FoundationHuntley, IL
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
20 internal medicine physician records list a Huntley practice address
They are 20 of the 372 NPPES records with a Huntley practice address, and 8,522 internal medicine physician records in Illinois.
All 20 in Huntley → All 8,522 in Illinois → Every provider in Huntley →
Other internal medicine physician records in Illinois
- Peter Abadeer, D.O.Bloomington, IL1760469522
- Pamela Abadi, D.O.Winfield, IL1588820179
- Motaz Abas, MDPeoria, IL1215510201
- Elias Abate, M.D.Chicago, IL1336712199
- Maliha Abbas, D.O.Chicago, IL1174963920
- Zareena Abbas, MDChicago, IL1427078872
- Abu Abbasi, MDChicago, IL1083243877
- Ayesha Abbasi, MDChicago, IL1376216705
- Khalda Abbasi, MDNaperville, IL1487705240
- Misha Abbasi, MDChicago, IL1770111635
Common questions
What is Andrew Diaz, DO's NPI number?
Andrew Diaz, DO's National Provider Identifier (NPI) is 1255951786, issued on Apr 24, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Diaz, DO located?
The NPPES record lists a practice address at 10400 Haligus RD, Huntley, IL, 60142. Phone: (815) 759-4323. Providers update this record themselves, so call before visiting.
How can I verify Andrew Diaz, DO's license?
NPPES lists Illinois license number 036164669, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Andrew Diaz, DO prescribe under Medicare Part D?
In 2024, Andrew Diaz, DO had 378 Medicare Part D claims for 175 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
What is Andrew Diaz, DO's Medicare quality score?
The 2023 MIPS final score is 94.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.