Stephen Kwak, MD
NPI 1154853729 · Diagnostic Radiology Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Kwak, MD is a Diagnostic Radiology Physician provider in Baltimore, MD (NPI 1154853729).
Provider details
- NPI number
- 1154853729
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- D93861 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 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
3,460 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 | 881 | $9 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 200 | $86 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 166 | $325 |
| X-Ray of Chest, 2 Views71046 | 155 | $10 |
| Ct Scan of Chest With Contrast71260 | 142 | $117 |
| Ct Scan of Chest With Contrast71260 | 140 | $53 |
Practice location
Mailing address
Additional practice locations (1)
- 1 Atwell RdCooperstown, NY 13326-1301Phone: (607) 547-3456Fax: (607) 547-6612
Registry dates
- Enumerated
- 2017-04-01
- Last updated
- 2022-06-03
- Certified
- 2022-06-03
Frequently asked questions
- What is Stephen Kwak's NPI number?
- Stephen Kwak's National Provider Identifier (NPI) is 1154853729, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Kwak's specialty?
- Stephen Kwak is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Kwak located?
- Stephen Kwak's practice location on file with NPPES is 600 N Wolfe St, Baltimore, MD 21287-0005.
- What is Stephen Kwak's phone number?
- The practice phone number listed in the NPPES registry for Stephen Kwak is (410) 955-5000.
- Does Stephen Kwak accept Medicare?
- Stephen Kwak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Kwak's NPI active?
- Yes — Stephen Kwak's NPI (1154853729) is active in the NPPES registry as of the last update on 2022-06-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.