Rita Joanne Herzing, M.D.
Internal Medicine Physician · Glen Ellyn, IL
Rita Joanne Herzing, M.D. is an internal medicine physician with a practice address in Glen Ellyn, Illinois, and NPI 1316103559, issued on Aug 6, 2008. Check the license (Illinois 036122493, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Rita Joanne Herzing
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036122493 IL
Self-reported in NPPES; status is on the state search - Practice location
- 430 Pennsylvania Ave Ste 310, Glen Ellyn, IL 60137
- Phone
- (630) 790-1792
- Enumerated
- Aug 6, 2008
- Record last updated
- Aug 8, 2023
- Fax
- (630) 545-7568
- Medicaid ID
- 036122493 IL
- Medicare enrollment
- Enrolled (PECOS I20090911000552); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2006
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 430 Pennsylvania Ave Ste 310
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Winnie Nhan, DOEndocrinology, Diabetes & Metabolism Physician1245681709
- Ashruta Patel, MDInternal Medicine Physician1164451696
Verify Rita Joanne Herzing 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 036122493Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.0 times the Medicare Part D claims of the average internal medicine physician in 2024
9,429 Medicare Part D claims for 802 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 78 claims were for opioids.
Most prescribed
- Atorvastatin Calcium779 claims
- Amlodipine Besylate686 claims
- Levothyroxine Sodium592 claims
- Losartan Potassium440 claims
- Rosuvastatin Calcium409 claims
- Metoprolol Succinate346 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: $71.43
3 payments; by number, the most common kind was food and beverage; the largest payer was Exact Sciences Corporation. The 50,334 providers of this specialty with any payment received $1,303.06 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 one group practice
- Dupage Medical Group LtdSchaumburg, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rita Joanne Herzing among 7,238 internal medicine physician records in Illinois
Rita Joanne Herzing, M.D. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 45% of them.
- NPI issued2008 · 45% of these records are older, 51% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2006 · median 2003 among the 3,580 with a school on file
- Record last updated2023 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
18 internal medicine physician records list a practice address in Glen Ellyn
They are 18 of the 684 NPPES records with a practice address in Glen Ellyn, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Glen Ellyn → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- John Baird, MDGlen Ellyn, IL 601371851555619
- Walter Briney, M.D.Glen Ellyn, IL 601371659365955
- Jonathan Delew, M.D.Glen Ellyn, IL 601371629060710
- Adelbert Duvel, MDGlen Ellyn, IL 601371275508772
- Stephen Gawne, MDGlen Ellyn, IL 601371497729537
- Mary Kungl, M.D.Glen Ellyn, IL 601371437215076
- Thomas Marshall, M.D.Glen Ellyn, IL 601371043202054
- Carol Olmstead Miecznikowski, MDGlen Ellyn, IL 601371467429456
Common questions
What is Rita Joanne Herzing, M.D.'s NPI number?
Rita Joanne Herzing, M.D.'s National Provider Identifier (NPI) is 1316103559, issued on Aug 6, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Rita Joanne Herzing, M.D. located?
The NPPES record lists a practice address at 430 Pennsylvania Ave Ste 310, Glen Ellyn, IL, 60137. Phone: (630) 790-1792. Providers update this record themselves, so call before visiting.
How can I verify Rita Joanne Herzing, M.D.'s license?
NPPES lists Illinois license number 036122493, 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 Rita Joanne Herzing, M.D. prescribe under Medicare Part D?
In 2024, Rita Joanne Herzing, M.D. had 9,429 Medicare Part D claims for 802 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.