Timothy E. Jessen, MD
Allergy & Immunology Physician · Freeport, IL
Timothy E. Jessen, MD is an allergy & immunology physician with a practice address in Freeport, Illinois, and NPI 1831165034, issued on Feb 27, 2006. Check the license (Illinois 036077588, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Timothy E. Jessen
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- 036077588 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1010 Fairway Dr, Freeport, IL 61032
- Phone
- (815) 599-6930
- Enumerated
- Feb 27, 2006
- Record last updated
- Oct 23, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (815) 599-7613
- Medicaid ID
- 036077588 IL
- Medicare enrollment
- Enrolled (PECOS I20050708000302); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1983
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 162 in Illinois → Look up another NPI →
Also registered at 1010 Fairway Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lindsay Bader, PTPhysical Medicine & Rehabilitation Physician1396977864
- Megan Bauer, FNP-BCFamily Nurse Practitioner1811680333
- Cynthia Baxter, PTAPhysical Therapy Assistant1437903853
- Tamisha Bonvillain, FNP-BCFamily Nurse Practitioner1073163838
- Tracy Clay, NPFamily Nurse Practitioner1841347069
- John Cook, APRN,BCFamily Nurse Practitioner1467426445
Verify Timothy E. Jessen 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 036077588Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% more Medicare Part D claims than the average allergy & immunology physician in 2024
1,328 Medicare Part D claims for 205 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. 20 claims were for opioids.
Most prescribed
- Montelukast Sodium109 claims
- Prednisone101 claims
- Albuterol Sulfate Hfa79 claims
- Breo Ellipta69 claims
- Azelastine Hcl63 claims
- Trelegy Ellipta55 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): 82.6 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: $477.22
28 payments; by number, the most common kind was food and beverage; the largest payer was Genzyme Corporation. The 2,496 providers of this specialty with any payment received $8,321.81 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
- Freeport Memorial HospitalFreeport, IL
- Freeport Regional Health Care FoundationFreeport, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy E. Jessen among 162 allergy & immunology physician records in Illinois
Timothy E. Jessen, MD is one of 162 allergy & immunology physician records with a practice address in Illinois. 86% 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 14% of them.
- NPI issued2006 · 14% of these records are older, 48% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1983 · median 2001 among the 114 with a school on file
- Record last updated2017 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in Illinois
There are 162 allergy & immunology physician records in Illinois.
All 162 in Illinois → Every provider in Freeport → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Charles Frey, DORockford, IL 611071356321244
- Chester Mellies, MDRockford, IL 611071770563660
- Fatima Mohiuddin, MDRockford, IL 611071578674834
- Ahmad Mourad, M.DRockford, IL 611071861425720
- David Chudwin, M.D.Bourbonnais, IL 609141669472262
- Mark Blaser, MDMoline, IL 612651982683264
- Kyung Kim, M.D.Niles, IL 607141104932136
- Kirk Shepard, MD, MSChicago, IL 606571982022810
Common questions
What is Timothy E. Jessen, MD's NPI number?
Timothy E. Jessen, MD's National Provider Identifier (NPI) is 1831165034, issued on Feb 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Timothy E. Jessen, MD located?
The NPPES record lists a practice address at 1010 Fairway Dr, Freeport, IL, 61032. Phone: (815) 599-6930. Providers update this record themselves, so call before visiting.
How can I verify Timothy E. Jessen, MD's license?
NPPES lists Illinois license number 036077588, 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 Timothy E. Jessen, MD prescribe under Medicare Part D?
In 2024, Timothy E. Jessen, MD had 1,328 Medicare Part D claims for 205 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
What is Timothy E. Jessen, MD's MIPS final score?
The 2023 MIPS final score is 82.6 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.