Elizabeth Day, DO
NPI 1578534053 · Critical Care Medicine (Internal Medicine) Physician · Duluth, MN
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elizabeth Day, DO is a Critical Care Medicine (Internal Medicine) Physician provider in Duluth, MN (NPI 1578534053).
Provider details
- NPI number
- 1578534053
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 73951 (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
20 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
330 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 74 | $198 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 40 | $92 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 36 | $111 |
| Test to Measure Expiratory Airflow and Volume Changes Before and After Medication Administration94060 | 30 | $10 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 29 | $62 |
| Test to Determine Lung Volumes Using Sensors94726 | 28 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 151 | 31 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 88 | 41 |
| Prednisone | 74 | 44 |
| Tiotropium Bromidebrand: Spiriva Respimat | 48 | 12 |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 46 | 11 |
| Montelukast Sodium | 43 | 15 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-31
- Last updated
- 2025-07-01
- Certified
- 2025-07-01
Frequently asked questions
- What is Elizabeth Day's NPI number?
- Elizabeth Day's National Provider Identifier (NPI) is 1578534053, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elizabeth Day's specialty?
- Elizabeth Day is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Elizabeth Day located?
- Elizabeth Day's practice location on file with NPPES is 920 E 1st St Ste 201, Duluth, MN 55805-2215.
- What is Elizabeth Day's phone number?
- The practice phone number listed in the NPPES registry for Elizabeth Day is (218) 249-7970.
- Does Elizabeth Day accept Medicare?
- Elizabeth Day is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elizabeth Day's NPI active?
- Yes — Elizabeth Day's NPI (1578534053) is active in the NPPES registry as of the last update on 2025-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.