TIMOTHY E JESSEN (MD) – Allergy & Immunology Physician, NPI 1831165034
Allergy & Immunology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
220 ALLERGY/IMMUNOLOGY in IL
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Provider Addresses for TIMOTHY E JESSEN (MD)
West Exchange Street, Freeport, Stephenson County, Illinois, 61032, United States
PO BOX 268
FREEPORT, IL 610324030
Phone: (815) 599-7950
Type: Mailing
Fairway Drive, Freeport, Stephenson County, Illinois, 61032, United States
FREEPORT, IL 610326600
Phone: (815) 599-6930
Fax: (815) 599-7613
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 51 Open Payments records for all available years, with a total value of $926.
Total Amount is formed as General ($926) + Research ($0) + Ownership ($0) = $926.
Last reported payment date: 2024-12-18 • Largest payer in this snapshot: GENZYME CORPORATION ($264).
Total Amount
$926
General + Research + Ownership
Payments
51
Total payment records
General Amount
$926
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-18
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| GENZYME CORPORATION | $264 |
| AstraZeneca Pharmaceuticals LP | $224 |
| Regeneron Healthcare Solutions, Inc. | $202 |
| Amgen Inc. | $78 |
| PFIZER INC. | $41 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-07-08
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050708000302 | I | Allergy/Immunology | IL | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 95004 | Test for allergy using allergenic extract | 520 | 12 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 127 | 74 | $0 |
| 94729 | Test to examine how well the lungs exchange gases | 83 | 82 | $0 |
| 96372 | Injection of drug or substance under skin or into muscle | 79 | 15 | $0 |
| 94727 | Test to determine lung volumes using gas dilution or washout | 74 | 73 | $0 |
Insurance plans in this area (ZIP 61032)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| ALLERGY/IMMUNOLOGY | IL | 95117 | Injection of incremental dosages of allergen, 2 or more injections | 325 | 17 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Interventional Cardiology | IL | |
| Infectious Disease, Internal Medicine | IL | |
| Family Practice | IL | |
| - | DE | |
| Family Practice | IL | |
| O B S T E T R I C S/ G Y N E C O L O G Y | IL | |
| - | IL | |
| Family Practice | IL | |
| Orthopedic Surgery | IL | |
| Family Practice | IL |
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