Benedict Gierl, M.D.
Psychiatry Physician · Oak Park, IL
Benedict Gierl, M.D. is a psychiatry physician with a practice address in Oak Park, Illinois, and NPI 1649397969, issued on Mar 23, 2007. Check the license (Illinois 036066271, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Benedict Gierl
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 036066271 IL
Self-reported in NPPES; status is on the state search - Practice location
- 320 N Lombard Ave, Oak Park, IL 60302
- Phone
- (312) 942-8067
- Enumerated
- Mar 23, 2007
- Record last updated
- Apr 16, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (708) 386-4291
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,147 in Illinois → Look up another NPI →
Also registered at 320 N Lombard Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Karla Hayter, PHYSICAL THERAPISTPhysical Therapist1528337714
Verify Benedict Gierl 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 036066271Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average psychiatry physician in 2024
425 Medicare Part D claims for 37 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Memantine Hcl75 claims
- Quetiapine Fumarate71 claims
- Gabapentin59 claims
- Gemtesa38 claims
- Mirtazapine38 claims
- Lamotrigine37 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.
Benedict Gierl among 2,147 psychiatry physician records in Illinois
Benedict Gierl, M.D. is one of 2,147 psychiatry physician records with a practice address in Illinois. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 35% of them.
- NPI issued2007 · 35% of these records are older, 50% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 41% of these records are
- Record last updated2008 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 psychiatry physician records list a practice address in Oak Park
They are 22 of the 2,307 NPPES records with a practice address in Oak Park, and 2,147 psychiatry physician records in Illinois.
All 2,147 in Illinois → Every provider in Oak Park → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Anthony Abadir, MDOak Park, IL 603021295312551
- Rad Gharavi, M.D.Oak Park, IL 603021518078732
- Stuart Greene, M.D.Oak Park, IL 603021609966795
- Jonathan Howard, M.D.Oak Park, IL 603021932355591
- Julia Hulcher, MDOak Park, IL 603021154423382
- Ann Sarpy, MDOak Park, IL 603021750426656
- Lilian Spigelman, MDOak Park, IL 603021134362569
- Adedapo Williams, MDOak Park, IL 603021588759195
Common questions
What is Benedict Gierl, M.D.'s NPI number?
Benedict Gierl, M.D.'s National Provider Identifier (NPI) is 1649397969, issued on Mar 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Benedict Gierl, M.D. located?
The NPPES record lists a practice address at 320 N Lombard Ave, Oak Park, IL, 60302. Phone: (312) 942-8067. Providers update this record themselves, so call before visiting.
How can I verify Benedict Gierl, M.D.'s license?
NPPES lists Illinois license number 036066271, 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 Benedict Gierl, M.D. prescribe under Medicare Part D?
In 2024, Benedict Gierl, M.D. had 425 Medicare Part D claims for 37 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.