Charles Yoo
NPI 1912360355 · Internal Medicine Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Yoo is a Internal Medicine Physician provider in Milwaukee, WI (NPI 1912360355).
Provider details
- NPI number
- 1912360355
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 70347 (WI)
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
10 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
553 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 | 266 | $69 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 117 | $115 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 111 | $100 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 30 | $154 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 29 | $104 |
Typical Medicare-allowed amounts for these services range $69–$154 (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 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 27 | 11 |
| Pantoprazole Sodium | 26 | 13 |
| Apixabanbrand: Eliquis | 26 | — |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 22 | 22 |
| Doxycycline Monohydrate | 19 | 14 |
| Carvedilol | 18 | — |
| Prednisone |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-04-02
- Last updated
- 2021-10-08
- Certified
- 2021-10-08
Frequently asked questions
- What is Charles Yoo's NPI number?
- Charles Yoo's National Provider Identifier (NPI) is 1912360355, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Yoo's specialty?
- Charles Yoo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Yoo located?
- Charles Yoo's practice location on file with NPPES is 8701 W Watertown Plank Rd, Milwaukee, WI 53226-3548.
- What is Charles Yoo's phone number?
- The practice phone number listed in the NPPES registry for Charles Yoo is (414) 955-8296.
- Does Charles Yoo accept Medicare?
- Charles Yoo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Yoo's NPI active?
- Yes — Charles Yoo's NPI (1912360355) is active in the NPPES registry as of the last update on 2021-10-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.