Charlotte Koo, MD
NPI 1093158297 · Hospitalist Physician · Glenview, IL
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charlotte Koo, MD is a Hospitalist Physician provider in Glenview, IL (NPI 1093158297).
Provider details
- NPI number
- 1093158297
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036139709 (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
13 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
531 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 | 208 | $75 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 131 | $113 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 129 | $109 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 49 | $166 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 14 | $118 |
Typical Medicare-allowed amounts for these services range $75–$166 (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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefdinir | 42 | 42 |
| Doxycycline Hyclate | 36 | 36 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 35 | 35 |
| Methylprednisolone | 35 | 35 |
| Amlodipine Besylate | 23 | 23 |
| Pantoprazole Sodium | 20 | 20 |
| Furosemide | 13 | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-04-08
- Last updated
- 2019-06-25
Frequently asked questions
- What is Charlotte Koo's NPI number?
- Charlotte Koo's National Provider Identifier (NPI) is 1093158297, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charlotte Koo's specialty?
- Charlotte Koo is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Charlotte Koo located?
- Charlotte Koo's practice location on file with NPPES is 2100 Pfingsten Rd Ste 3001a, Glenview, IL 60026-1301.
- What is Charlotte Koo's phone number?
- The practice phone number listed in the NPPES registry for Charlotte Koo is (847) 657-5840.
- Does Charlotte Koo accept Medicare?
- Charlotte Koo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charlotte Koo's NPI active?
- Yes — Charlotte Koo's NPI (1093158297) is active in the NPPES registry as of the last update on 2019-06-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.