Jessica Marie Diethelm, M.D.
Internal Medicine Physician · Chicago, IL
Jessica Marie Diethelm, M.D. is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1427232412, issued on Dec 26, 2007. Check the license (Illinois 036118681, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Jessica Marie Diethelm
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036118681 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1725 W Harrison St, Chicago, IL 60612
- Phone
- (312) 942-6700
- Enumerated
- Dec 26, 2007
- Record last updated
- May 4, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (312) 942-3633
- Medicaid ID
- 036118681 IL
- Medicare enrollment
- Enrolled (PECOS I20080718000505); accepts Medicare assignment
- Medical or professional school
- University Of Toledo College Of Medicine, 2004
- 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 1725 W Harrison St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Qurrat-Ul-Ain Abid, MDHospice and Palliative Medicine (Internal Medicine) Physician1053949024
- John Acheson, MDSurgery Physician1205528726
- David Agbunag, PA-CSurgical Physician Assistant1093885188
- Eda Akyar, MDSports Medicine (Family Medicine) Physician1255910006
- Jorelle Alexander, DMD,MPHDentist1972790756
- Amjad Ali, M.D.Specialist1952359184
Verify Jessica Marie Diethelm 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 036118681Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% more Medicare Part D claims than the average internal medicine physician in 2024
5,395 Medicare Part D claims for 525 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 129 claims were for opioids.
Most prescribed
- Atorvastatin Calcium645 claims
- Amlodipine Besylate321 claims
- Hydrochlorothiazide277 claims
- Lisinopril187 claims
- Omeprazole174 claims
- Levothyroxine Sodium158 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.
Bills Medicare through one group practice
- Rush University Medical GroupChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jessica Marie Diethelm among 7,238 internal medicine physician records in Illinois
Jessica Marie Diethelm, 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 2007, is newer than 39% of them.
- NPI issued2007 · 39% of these records are older, 55% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2004 · median 2003 among the 3,580 with a school on file
- Record last updated2011 · 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).
2,867 internal medicine physician records list a practice address in Chicago
They are 2,867 of the 63,379 NPPES records with a practice address in Chicago, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Chicago → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Keith Boyd, M.D.Chicago, IL 606121174591978
- Lewis Coulson, M.D.Chicago, IL 606121619944931
- Henry Danko, M.D.Chicago, IL 606121780659524
- Denis Evans, M.D.Chicago, IL 606121952385841
- Tabassum Faruqi, M.D.Chicago, IL 606121013968536
- David Goldberg, MDChicago, IL 606121275588444
- Ionut Ilie, M.D.Chicago, IL 606121619926383
- Padma Kudaravalli, M.D.Chicago, IL 606121427004514
Common questions
What is Jessica Marie Diethelm, M.D.'s NPI number?
Jessica Marie Diethelm, M.D.'s National Provider Identifier (NPI) is 1427232412, issued on Dec 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Jessica Marie Diethelm, M.D. located?
The NPPES record lists a practice address at 1725 W Harrison St, Chicago, IL, 60612. Phone: (312) 942-6700. Providers update this record themselves, so call before visiting.
How can I verify Jessica Marie Diethelm, M.D.'s license?
NPPES lists Illinois license number 036118681, 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 Jessica Marie Diethelm, M.D. prescribe under Medicare Part D?
In 2024, Jessica Marie Diethelm, M.D. had 5,395 Medicare Part D claims for 525 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.