Ki Seok Won, MD
NPI 1164048179 · Internal Medicine Physician · Evanston, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ki Seok Won, MD is a Internal Medicine Physician provider in Evanston, IL (NPI 1164048179).
Provider details
- NPI number
- 1164048179
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
6 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
633 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 291 | $71 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 167 | $104 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 83 | $108 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 64 | $118 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 28 | $158 |
Typical Medicare-allowed amounts for these services range $71–$158 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 41 | 40 |
| Prednisone | 40 | 36 |
| Cefdinir | 40 | 40 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 38 | 34 |
| Apixabanbrand: Eliquis | 19 | 18 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 19 | 19 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-06-25
- Last updated
- 2023-03-26
- Certified
- 2023-03-26
Frequently asked questions
- What is Ki Seok Won's NPI number?
- Ki Seok Won's National Provider Identifier (NPI) is 1164048179, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ki Seok Won's specialty?
- Ki Seok Won is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ki Seok Won located?
- Ki Seok Won's practice location on file with NPPES is 355 Ridge Ave, Evanston, IL 60202-3328.
- What is Ki Seok Won's phone number?
- The practice phone number listed in the NPPES registry for Ki Seok Won is (847) 316-4000.
- Does Ki Seok Won accept Medicare?
- Ki Seok Won is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ki Seok Won's NPI active?
- Yes — Ki Seok Won's NPI (1164048179) is active in the NPPES registry as of the last update on 2023-03-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.