DR. DEMETRIOS SPYRIDON THEODOROPOULOS (M.D.) – Clinical & Laboratory Immunology (Allergy & Immunology) Physician, NPI 1326299488
Clinical & Laboratory Immunology (Allergy & Immunology) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
96 ALLERGY/IMMUNOLOGY in WI
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Provider Addresses for DR. DEMETRIOS SPYRIDON THEODOROPOULOS (M.D.)
2727, Midwest Drive, Onalaska, La Crosse County, Wisconsin, 54650, United States
ONALASKA, WI 54650
Phone: (608) 782-2027
Fax: (608) 782-6172
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 69 Open Payments records for all available years, with a total value of $2,234.
Total Amount is formed as General ($2,234) + Research ($0) + Ownership ($0) = $2,234.
Last reported payment date: 2024-12-16 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($973).
Total Amount
$2,234
General + Research + Ownership
Payments
69
Total payment records
General Amount
$2,234
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-16
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $973 |
| GENZYME CORPORATION | $276 |
| Amgen Inc. | $245 |
| Grifols USA, LLC | $84 |
| PFIZER INC. | $80 |
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: 2005-09-22
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 |
|---|---|---|---|---|
| I20050922001172 | I | Allergy/Immunology | WI | 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 |
|---|---|---|---|---|
| 95024 | Test for allergy using allergenic extract injected into skin | 2,191 | 190 | $0 |
| 86003 | Measurement of antibody (ige) to allergic substance, crude allergen extract, each | 252 | 38 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 109 | 103 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 85 | 81 | $0 |
| 82785 | Ige (immune system protein) level | 41 | 38 | $0 |
Insurance plans in this area (ZIP 54650)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| ALLERGY/IMMUNOLOGY | WI | 95004 | Injection of allergenic extracts into skin, accessed through the skin | 69 | 17 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | NY | |
| Nurse Practitioner | WI | |
| - | WI | |
| - | WI | |
| Nurse Practitioner | WI | |
| Nurse Practitioner | VA |
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