Marian Demus, M.D.
NPI 1326146820 · Diagnostic Radiology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marian Demus, M.D. is a Diagnostic Radiology Physician provider in Chicago, IL (NPI 1326146820).
Provider details
- NPI number
- 1326146820
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 36072464 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
6,728 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 2,661 | $8 |
| Ct Scan Head Or Brain Without Contrast70450 | 1,029 | $37 |
| Ct Scan of Blood Vessels of Chest With Contrast71275 | 370 | $79 |
| Ct Scan of Upper Spine Without Contrast72125 | 309 | $44 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 299 | $80 |
| Ct Scan of Chest With Contrast71260 | 219 | $49 |
| Imaging for Evaluation of Swallowing Function |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-20
- Last updated
- 2012-04-23
Frequently asked questions
- What is Marian Demus's NPI number?
- Marian Demus's National Provider Identifier (NPI) is 1326146820, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marian Demus's specialty?
- Marian Demus is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Marian Demus located?
- Marian Demus's practice location on file with NPPES is 1431 N Claremont Ave, Chicago, IL 60622-1702.
- What is Marian Demus's phone number?
- The practice phone number listed in the NPPES registry for Marian Demus is (312) 633-5850.
- Does Marian Demus accept Medicare?
- Marian Demus is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marian Demus's NPI active?
- Yes — Marian Demus's NPI (1326146820) is active in the NPPES registry as of the last update on 2012-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.