Zachary Alexander Warren, MD
Otolaryngic Allergy Physician · Chicago, IL
Zachary Alexander Warren, MD is an otolaryngic allergy physician with a practice address in Chicago, Illinois, and NPI 1669933222, issued on Mar 27, 2019. Check the license (Illinois 125.075059, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Zachary Alexander Warren
- Credential
- MD
- Primary taxonomy
- Otolaryngic Allergy Physician 207YX0602X
- License numbers
- 125.075059 IL
100647 GA
Self-reported in NPPES; status is on the state search - Practice location
- 5841 S Maryland Ave # MC1035, Chicago, IL 60637
- Phone
- (773) 702-1865
- Enumerated
- Mar 27, 2019
- Record last updated
- Sep 18, 2024
- Fax
- (773) 834-3888
- Medicare enrollment
- Enrolled (PECOS I20240729002849); accepts Medicare assignment
- Entity
- Type 1 · individual
3 nearest otolaryngic allergy physician records → All 4 in Illinois → Look up another NPI →
Also registered at 5841 S Maryland Ave # MC1035
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Samuel AugerOtolaryngology Physician1144858820
- Mary KressOtolaryngology Physician1922892371
- Tina LamOtolaryngology Physician1598466971
- Arushi Mahajan, MDStudent in an Organized Health Care Education/Training Program1023861739
- Nicholas Oberhelman, MDOtolaryngology Physician1144965286
- Lauren Pinzas, MDStudent in an Organized Health Care Education/Training Program1639826159
Verify Zachary Alexander Warren 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 125.075059Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average otolaryngic allergy physician in 2024
80 Medicare Part D claims for 50 beneficiaries, against an average of 867 among the 91 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 29 claims were for opioids.
Most prescribed
- Tramadol Hcl15 claims
- Hydrocodone-Acetaminophen13 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.
Industry payments in 2024: $2,506.98
15 payments; by number, the most common kind was travel and lodging; the largest payer was Stryker Corporation. The 64 providers of this specialty with any payment received $4,752.63 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Southern California Permanente Medical GroupOxnard, CA
- The Emory Clinic IncAtlanta, GA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Otolaryngic Allergy Physician providers in Illinois
There are 4 otolaryngic allergy physician records in Illinois.
All 4 in Illinois → Every provider in Chicago → Otolaryngic Allergy Physician nationwide →
The 3 otolaryngic allergy physician records with the nearest ZIP codes
- John Hung, MDBourbonnais, IL 609141386715142
- Kody Bolk, MDSpringfield, IL 627021669976023
- Dennis Mlot, M.D.Mount Vernon, IL 628641609955715
Common questions
What is Zachary Alexander Warren, MD's NPI number?
Zachary Alexander Warren, MD's National Provider Identifier (NPI) is 1669933222, issued on Mar 27, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Zachary Alexander Warren, MD located?
The NPPES record lists a practice address at 5841 S Maryland Ave # MC1035, Chicago, IL, 60637. Phone: (773) 702-1865. Providers update this record themselves, so call before visiting.
How can I verify Zachary Alexander Warren, MD's license?
NPPES lists Illinois license number 125.075059, 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 Zachary Alexander Warren, MD prescribe under Medicare Part D?
In 2024, Zachary Alexander Warren, MD had 80 Medicare Part D claims for 50 beneficiaries; the average among otolaryngic allergy physician prescribers was 867. 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.