Physician Profile
Demetrios S. Theodoropoulos, M.D.
Unclaimed ProfileAbout Dr. Theodoropoulos
Based in Onalaska, WI, Demetrios S. Theodoropoulos, M.D. is listed in the NPI registry under clinical & laboratory immunology. According to Medicare claims data, Demetrios cared for 516 Medicare patients across 2,578 services. The services billed most often include test for allergy using allergenic extract injected into skin, measurement of antibody (ige) to allergic substance, crude allergen extract, each, and established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (608) 782-2027
- Email not available
Practice Locations
2727 MIDWEST DRIVE
Onalaska, WI 54650
Procedures Most Often Billed to Medicare
2,578 services · 516 patients · 13 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Test for allergy using allergenic extract injected into skin | Treatment | 95024 |
2,025 | Too few peers to compare |
| Test to measure expiratory airflow and volume changes before and after medication administration | Treatment | 94060 |
22 | Too few peers to compare |
| Test to measure the level of nitric oxide gas | Treatment | 95012 |
21 | Too few peers to compare |
| Influenza vaccine, trivalent, split virus, preservative-free, 0.5 ml dosage | Treatment | 90656 |
17 | Too few peers to compare |
| Measurement of antibody (ige) to allergic substance, crude allergen extract, each | Lab test | 86003 |
208 | Too few peers to compare |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
97 | Too few peers to compare |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
58 | As often as other peers in Clinical & Laboratory Immunology |
| Ige (immune system protein) level | Lab test | 82785 |
33 | Too few peers to compare |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
25 | Too few peers to compare |
| Telephone medical discussion with physician, 11-20 minutes | Office visit | 99442 |
22 | Too few peers to compare |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at Other 4
Other providers in the same specialty who trained at the same institution.
Class of 1987 at Other 8
Providers who graduated from the same medical school in the same year.
More connections — 7 related providers in 1 group
Also performs Test for allergy using allergenic extract injected into skin 7
Providers in WI who bill this service to Medicare most often.
Common questions
What does Demetrios S. Theodoropoulos specialize in?
Demetrios S. Theodoropoulos is a clinical & laboratory immunology in Onalaska, WI. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Demetrios S. Theodoropoulos located?
Demetrios S. Theodoropoulos is listed at 2727 Midwest Drive, Onalaska, WI 54650. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Demetrios S. Theodoropoulos's phone number?
The number on file is (608) 782-2027. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Demetrios S. Theodoropoulos's NPI number?
Demetrios S. Theodoropoulos's National Provider Identifier is 1326299488. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Demetrios S. Theodoropoulos train?
Demetrios S. Theodoropoulos attended Other, graduating in 1987. This comes from the CMS National Downloadable File.
CMS public data
How long has Demetrios S. Theodoropoulos been practicing?
Demetrios S. Theodoropoulos has 39 years experience. Calculated from a graduation year of 1987, reported in the CMS National Downloadable File.
CMS public data
What does Demetrios S. Theodoropoulos do most often?
According to Medicare billing data, Demetrios S. Theodoropoulos provides treatments such as test for allergy using allergenic extract injected into skin and test to measure expiratory airflow and volume changes before and after medication administration, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Demetrios S. Theodoropoulos confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Demetrios S. Theodoropoulos. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.