Gerald Brian Holtz, M.D.
Diagnostic Radiology Physician · Naperville, IL
Gerald Brian Holtz, M.D. is a diagnostic radiology physician with a practice address in Naperville, Illinois, and NPI 1578649554, issued on Oct 31, 2006. Check the license (Illinois 36-44766, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gerald Brian Holtz
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- 36-44766 IL
Self-reported in NPPES; status is on the state search - Practice location
- 705 S Sleight St, Naperville, IL 60540
- Phone
- (630) 903-4520
- Enumerated
- Oct 31, 2006
- Record last updated
- Jan 6, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20220405000845); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1968
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 1,874 in Illinois → Look up another NPI →
Verify Gerald Brian Holtz 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 36-44766Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7 hospitals and group practices
- Adventist Health Mendocino CoastFort Bragg, CA · Critical Access Hospitals3 of 5 stars
- Adventist Health TulareTulare, CA · Acute Care Hospitals3 of 5 stars
- Adventist Health DelanoDelano, CA · Acute Care Hospitals2 of 5 stars
- Advanced Radiology And Interventional Associates IncStockton, CA
- Hanford Community HospitalHanford, CA
- San Joaquin Community HospitalBakersfield, CA
- Sol Radiology IncNaperville, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Gerald Brian Holtz among 1,874 diagnostic radiology physician records in Illinois
Gerald Brian Holtz, M.D. is one of 1,874 diagnostic radiology physician records with a practice address in Illinois. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 54% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1968 · median 2004 among the 1,201 with a school on file
- Record last updated2011 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in Illinois
There are 1,874 diagnostic radiology physician records in Illinois.
All 1,874 in Illinois → Every provider in Naperville → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Paul Backas, MDNaperville, IL 605401063463511
- Donald Ball, MDNaperville, IL 605401750331260
- Heidi Eklund, MDNaperville, IL 605401972553261
- Jeffrey Girardot, MDNaperville, IL 605401104802016
- Paul Goldberg, MDNaperville, IL 605401508817065
- Victor Hu, MDNaperville, IL 605401407807993
- Yuk Li, MDNaperville, IL 605401871544239
- Amaar Malik, DONaperville, IL 605401023085941
Common questions
What is Gerald Brian Holtz, M.D.'s NPI number?
Gerald Brian Holtz, M.D.'s National Provider Identifier (NPI) is 1578649554, issued on Oct 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gerald Brian Holtz, M.D. located?
The NPPES record lists a practice address at 705 S Sleight St, Naperville, IL, 60540. Phone: (630) 903-4520. Providers update this record themselves, so call before visiting.
How can I verify Gerald Brian Holtz, M.D.'s license?
NPPES lists Illinois license number 36-44766, 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.
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.