Bob Kao, MD
NPI 1821009440 · Diagnostic Radiology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Bob Kao, MD is a Diagnostic Radiology Physician provider in Chicago, IL (NPI 1821009440).
Provider details
- NPI number
- 1821009440
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036094799 (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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
3,282 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 Head Or Brain Without Contrast70450 | 427 | $40 |
| X-Ray of Chest, 1 View71045 | 331 | $9 |
| Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971 | 219 | $21 |
| X-Ray of Chest, 2 Views71046 | 209 | $11 |
| Ct Scan of Blood Vessels of Chest With Contrast71275 | 170 | $86 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 170 | $86 |
Practice location
Mailing address
Additional practice locations (1)
- 350 Grandview RdSebastopol, CA 95472-2922Phone: (707) 861-9818
Registry dates
- Enumerated
- 2006-08-10
- Last updated
- 2023-01-29
- Certified
- 2023-01-29
Frequently asked questions
- What is Bob Kao's NPI number?
- Bob Kao's National Provider Identifier (NPI) is 1821009440, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Bob Kao's specialty?
- Bob Kao is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Bob Kao located?
- Bob Kao's practice location on file with NPPES is 1635 N Winchester Ave, Chicago, IL 60622-1321.
- What is Bob Kao's phone number?
- The practice phone number listed in the NPPES registry for Bob Kao is (773) 276-5886.
- Does Bob Kao accept Medicare?
- Bob Kao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Bob Kao's NPI active?
- Yes — Bob Kao's NPI (1821009440) is active in the NPPES registry as of the last update on 2023-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.