Dennis Prohaska, D. O.
NPI 1689651010 · Diagnostic Radiology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Interventional Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dennis Prohaska, D. O. is a Diagnostic Radiology Physician provider in Chicago, IL (NPI 1689651010).
Provider details
- NPI number
- 1689651010
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D. O.
- Sex
- Male
- Sole proprietor
- No
- License
- 1610-023 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,316 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Dxa Bone Density Measurement of Hip, Pelvis, Spine77080 | 246 | $9 |
| X-Ray of Chest, 1 View71045 | 192 | $8 |
| Ct Scan Head Or Brain Without Contrast70450 | 83 | $39 |
| Ct Scan of Blood Vessels of Chest With Contrast71275 | 44 | $82 |
| Ct Scan of Blood Vessels of Abdomen and Pelvis With Contrast74174 | 43 | $101 |
| X-Ray of Abdomen, 1 View74018 | 40 | $9 |
| Ct Scan of Blood Vessels of Neck With Contrast |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$475 across 7 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-28
- Last updated
- 2016-07-15
Frequently asked questions
- What is Dennis Prohaska's NPI number?
- Dennis Prohaska's National Provider Identifier (NPI) is 1689651010, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dennis Prohaska's specialty?
- Dennis Prohaska is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Dennis Prohaska located?
- Dennis Prohaska's practice location on file with NPPES is 1516 S Wabash Ave, Chicago, IL 60605-2903.
- What is Dennis Prohaska's phone number?
- The practice phone number listed in the NPPES registry for Dennis Prohaska is (414) 870-5178.
- Does Dennis Prohaska accept Medicare?
- Dennis Prohaska is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dennis Prohaska's NPI active?
- Yes — Dennis Prohaska's NPI (1689651010) is active in the NPPES registry as of the last update on 2016-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.