Darek Gregory Maciasz, R.PH
Pharmacist · Mt Prospect, IL
Darek Gregory Maciasz, R.PH is a pharmacist with a practice address in Mt Prospect, Illinois, and NPI 1891079463, issued on Sep 30, 2011. Check the license (Illinois 051288015, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Darek Gregory Maciasz
- Credential
- R.PH
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 051288015 IL
Self-reported in NPPES; status is on the state search - Practice location
- 999 N Elmhurst RD, Mt Prospect, IL 60056
- Phone
- (847) 660-2028
- Enumerated
- Sep 30, 2011
- Record last updated
- Sep 30, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (847) 660-2025
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 9,744 in Illinois → Look up another NPI →
Also registered at 999 N Elmhurst RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Harbans Mavi, MDInternal Medicine Physician1710052436
- Lois Veneskey, RPHPharmacist1184990475
Verify Darek Gregory Maciasz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 051288015Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 93% of the cost of the top drugs
91 Medicare Part D claims for 78 beneficiaries, against an average of 119 among the 28,524 providers of this specialty who prescribed in Part D. Brand-name drugs were 100% of claims.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Shingrix34 claims
- Arexvy33 claims
- Boostrix Tdap20 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.
Darek Gregory Maciasz among 9,744 pharmacist records in Illinois
Darek Gregory Maciasz, R.PH is one of 9,744 pharmacist records with a practice address in Illinois. 4% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 16% of them.
- NPI issued2011 · 16% of these records are older, 62% newer
- In a Medicare fileYes · 4% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2011 · 79% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 183500000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
24 pharmacist records list a practice address in Mt Prospect
They are 24 of the 215 NPPES records with a practice address in Mt Prospect, and 9,744 pharmacist records in Illinois.
All 9,744 in Illinois → Every provider in Mt Prospect → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Ellen Dalton, RPHMt Prospect, IL 600561639450323
- William Finnerty, PHARM.D.Mt Prospect, IL 600561497933097
- Jeffrey Green, RPH.Mount Prospect, IL 600561154602357
- Robert Heyman, RPHMount Prospect, IL 600561356544217
- Nathalie Krier, R.PH.Mt Prospect, IL 600561639318603
- Jennifer Miller, PHARMDMount Prospect, IL 600561932480712
- Dainisha Patel, R.PH.Mount Prospect, IL 600561912033119
- Aruna Patel, R.PH.Mt Prospect, IL 600561598930836
Common questions
What is Darek Gregory Maciasz, R.PH's NPI number?
Darek Gregory Maciasz, R.PH's National Provider Identifier (NPI) is 1891079463, issued on Sep 30, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Darek Gregory Maciasz, R.PH located?
The NPPES record lists a practice address at 999 N Elmhurst RD, Mt Prospect, IL, 60056. Phone: (847) 660-2028. Providers update this record themselves, so call before visiting.
How can I verify Darek Gregory Maciasz, R.PH's license?
NPPES lists Illinois license number 051288015, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Darek Gregory Maciasz, R.PH prescribe under Medicare Part D?
In 2024, Darek Gregory Maciasz, R.PH had 91 Medicare Part D claims for 78 beneficiaries; the average among pharmacist prescribers was 119. 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.