Hoyee Chan, MD
NPI 1336208297 · Internal Medicine Physician · Buffalo Grove, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hoyee Chan, MD is a Internal Medicine Physician provider in Buffalo Grove, IL (NPI 1336208297).
Provider details
- NPI number
- 1336208297
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036-070726 (IL)
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
19 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
2,306 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 332 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 325 | $134 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 275 | $137 |
| Advance Care Planning, First 30 Minutes99497 | 248 | $86 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 242 | $189 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Tracing |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 89 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 685 | 198 |
| Amlodipine Besylate | 388 | 112 |
| Losartan Potassium | 234 | 72 |
| Levothyroxine Sodium | 232 | 59 |
| Lisinopril | 197 | 58 |
| Metformin Hcl | 167 | 48 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-07
- Last updated
- 2020-10-13
- Certified
- 2020-10-13
Frequently asked questions
- What is Hoyee Chan's NPI number?
- Hoyee Chan's National Provider Identifier (NPI) is 1336208297, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hoyee Chan's specialty?
- Hoyee Chan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Hoyee Chan located?
- Hoyee Chan's practice location on file with NPPES is 400 Mchenry Rd, Buffalo Grove, IL 60089-6740.
- What is Hoyee Chan's phone number?
- The practice phone number listed in the NPPES registry for Hoyee Chan is (847) 520-9424.
- Does Hoyee Chan accept Medicare?
- Hoyee Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hoyee Chan's NPI active?
- Yes — Hoyee Chan's NPI (1336208297) is active in the NPPES registry as of the last update on 2020-10-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.