Calvin Flowers, M.D.
NPI 1598841843 · Neuroradiology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Calvin Flowers, M.D. is a Neuroradiology Physician provider in Chicago, IL (NPI 1598841843).
Provider details
- NPI number
- 1598841843
- Entity type
- Individual
- Primary specialty
- Neuroradiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036081453 (IL)
Specialties & taxonomies
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
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
77 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) |
|---|---|---|
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 32 | $87 |
| Ct Scan of Chest With Contrast71260 | 23 | $54 |
| Low Dose Ct Scan of Chest for Lung Cancer Screening71271 | 22 | $52 |
Typical Medicare-allowed amounts for these services range $52–$87 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (2)
- 1653 W Congress PkwyChicago, IL 60612-3833Phone: (312) 943-5000
- 1740 W Taylor StChicago, IL 60612-7232Phone: (312) 413-4900
Registry dates
- Enumerated
- 2006-10-30
- Last updated
- 2026-01-23
- Certified
- 2026-01-23
Frequently asked questions
- What is Calvin Flowers's NPI number?
- Calvin Flowers's National Provider Identifier (NPI) is 1598841843, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Calvin Flowers's specialty?
- Calvin Flowers is listed in the NPPES registry with a primary specialty of Neuroradiology Physician (Allopathic & Osteopathic Physicians).
- Where is Calvin Flowers located?
- Calvin Flowers's practice location on file with NPPES is 820 S Damen Ave, Chicago, IL 60612-3728.
- What is Calvin Flowers's phone number?
- The practice phone number listed in the NPPES registry for Calvin Flowers is (312) 569-7151.
- Does Calvin Flowers accept Medicare?
- Calvin Flowers is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Calvin Flowers's NPI active?
- Yes — Calvin Flowers's NPI (1598841843) is active in the NPPES registry as of the last update on 2026-01-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.