Eileen Chang, DO
NPI 1790218360 · Hospitalist Physician · Grand Blanc, MI
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Eileen Chang, DO is a Hospitalist Physician provider in Grand Blanc, MI (NPI 1790218360).
Provider details
- NPI number
- 1790218360
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 5101025844 (MI)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,038 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 50 Minutes99233 | 369 | $117 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 253 | $78 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 179 | $173 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 150 | $114 |
| Prolonged Hospital Inpatient Or Observation Care Evaluation and Management Service(s) Beyond the Total Time for the Primary Service (when the Primary Service Has Been Selected Using Time on the Date of the Primary Service); Each Additional 15 Minutes By ThG0316 | 44 | $30 |
| Initial Hospital Care With Same-Day Admission and Discharge With High Level of Medical Decision Making, Per Day, If Using Time, at Least 85 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 32 | 30 |
| Cefuroxime Axetilbrand: Cefuroxime | 23 | 23 |
| Atorvastatin Calcium | 18 | 15 |
| Furosemide | 17 | 16 |
| Prednisone | 16 | 16 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 13 | 13 |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-04-10
- Last updated
- 2021-02-24
- Certified
- 2021-02-24
Frequently asked questions
- What is Eileen Chang's NPI number?
- Eileen Chang's National Provider Identifier (NPI) is 1790218360, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Eileen Chang's specialty?
- Eileen Chang is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Eileen Chang located?
- Eileen Chang's practice location on file with NPPES is 12745 S Saginaw St # 806-196, Grand Blanc, MI 48439-2437.
- What is Eileen Chang's phone number?
- The practice phone number listed in the NPPES registry for Eileen Chang is (248) 691-8646.
- Does Eileen Chang accept Medicare?
- Eileen Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Eileen Chang's NPI active?
- Yes — Eileen Chang's NPI (1790218360) is active in the NPPES registry as of the last update on 2021-02-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.