Brett Howard Herzog, MD PHD
Medical Oncology Physician · Shiloh, IL
Brett Howard Herzog, MD PHD is a medical oncology physician with a practice address in Shiloh, Illinois, and NPI 1023499282, issued on Jun 13, 2015. Check the license (Illinois 036153509, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Brett Howard Herzog
- Credential
- MD PHD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- 036153509 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1418 Cross St, Shiloh, IL 62269
- Phone
- (618) 607-1340
- Enumerated
- Jun 13, 2015
- Record last updated
- Apr 21, 2025
- Fax
- (618) 622-9724
- Medicaid ID
- 200063716 MO
- Medicare enrollment
- Enrolled (PECOS I20210813002314); accepts Medicare assignment
- Medical or professional school
- University Of Oklahoma College Of Medicine, 2015
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 182 in Illinois → Look up another NPI →
Also registered at 1418 Cross St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amanda Allen, AGNPGerontology Nurse Practitioner1346999315
- Corey Brooks, PAPhysician Assistant1134466485
- Alfred Greco, MDMedical Oncology Physician1073501607
- Paul Kogan, MDUrology Physician1023377736
- Staci Ladowitz, PAMedical Physician Assistant1639711963
- Susan Laduzinsky, MDRadiation Oncology Physician1942202155
Verify Brett Howard Herzog 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 036153509Check 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% more Medicare Part D claims than the average medical oncology physician in 2024
1,102 Medicare Part D claims for 139 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. 222 claims were for opioids.
Most prescribed
- Dexamethasone117 claims
- Oxycodone Hcl113 claims
- Prochlorperazine Maleate71 claims
- Levothyroxine Sodium57 claims
- Ondansetron Hcl56 claims
- Morphine Sulfate Er49 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 practice group's MIPS final score for 2023 (Medicare payment program): 79.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $162.51
3 payments; by number, the most common kind was food and beverage; the largest payer was Galvanize Therapeutics, Inc. The 3,343 providers of this specialty with any payment received $11,773.47 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
- Washington UniversitySaint Louis, MO
- Washington University Physicians IN Illinois IncShiloh, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brett Howard Herzog among 182 medical oncology physician records in Illinois
Brett Howard Herzog, MD PHD is one of 182 medical oncology physician records with a practice address in Illinois. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 83% of them.
- NPI issued2015 · 83% of these records are older, 13% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2015 · median 2000 among the 132 with a school on file
- Record last updated2025 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 medical oncology physician records list a practice address in Shiloh
They are 4 of the 181 NPPES records with a practice address in Shiloh, and 182 medical oncology physician records in Illinois.
All 182 in Illinois → Every provider in Shiloh → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Justin Floyd, DOO Fallon, IL 622691629164678
- Alfred Greco, MDShiloh, IL 622691073501607
- William Popovic, MDShiloh, IL 622691609824549
- John Visconti, DOShiloh, IL 622691033167846
- Mohammed Siddiqui, MDNashville, IL 622631730115973
- Guillermo Rodriguez, MDBelleville, IL 622261861440661
- Philip Dy, M.D.Effingham, IL 624011710076567
- Mario Velasco, MDDecatur, IL 625261326007782
Common questions
What is Brett Howard Herzog, MD PHD's NPI number?
Brett Howard Herzog, MD PHD's National Provider Identifier (NPI) is 1023499282, issued on Jun 13, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Brett Howard Herzog, MD PHD located?
The NPPES record lists a practice address at 1418 Cross St, Shiloh, IL, 62269. Phone: (618) 607-1340. Providers update this record themselves, so call before visiting.
How can I verify Brett Howard Herzog, MD PHD's license?
NPPES lists Illinois license number 036153509, 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 Brett Howard Herzog, MD PHD prescribe under Medicare Part D?
In 2024, Brett Howard Herzog, MD PHD had 1,102 Medicare Part D claims for 139 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is Brett Howard Herzog, MD PHD's MIPS final score?
The 2023 MIPS final score is 79.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.