Margaret Chen, MD
NPI 1578678272 · Internal Medicine Physician · Duluth, MN
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Chen, MD is a Internal Medicine Physician provider in Duluth, MN (NPI 1578678272).
Provider details
- NPI number
- 1578678272
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 62371 (MN)
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
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
887 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 | 587 | $112 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 102 | $109 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 69 | $74 |
| Critical Care, First 30-74 Minutes99291 | 66 | $198 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 35 | $159 |
| Critical Care, Each Additional 30 Minutes99292 | 28 | $99 |
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 |
|---|---|---|
| Atorvastatin Calcium | 32 | 20 |
| Pantoprazole Sodium | 30 | 17 |
| Metoprolol Succinate | 18 | — |
| Clopidogrel Bisulfatebrand: Clopidogrel | 15 | 12 |
| Furosemide | 15 | 12 |
| Prednisone | 15 | 15 |
| Amlodipine Besylate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-20
- Last updated
- 2019-07-02
Frequently asked questions
- What is Margaret Chen's NPI number?
- Margaret Chen's National Provider Identifier (NPI) is 1578678272, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Chen's specialty?
- Margaret Chen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Chen located?
- Margaret Chen's practice location on file with NPPES is 400 E 3rd St, Duluth, MN 55805-1951.
- What is Margaret Chen's phone number?
- The practice phone number listed in the NPPES registry for Margaret Chen is (218) 786-8364.
- Does Margaret Chen accept Medicare?
- Margaret Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Chen's NPI active?
- Yes — Margaret Chen's NPI (1578678272) is active in the NPPES registry as of the last update on 2019-07-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.