Caroline Day, MD
NPI 1093860652 · Family Medicine Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Caroline Day, MD is a Family Medicine Physician provider in Saint Louis, MO (NPI 1093860652).
Provider details
- NPI number
- 1093860652
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 2007020548 (MO)
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 tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
65 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Hemoglobin A1c Level83036 | 38 | $10 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 27 | $3 |
Typical Medicare-allowed amounts for these services range $3–$10 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 122 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 411 | 97 |
| Atorvastatin Calcium | 348 | 83 |
| Fluticasone Propionate | 279 | 66 |
| Lisinopril | 222 | 54 |
| Omeprazole | 218 | 51 |
| Gabapentin | 190 | 44 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$79 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-24
- Last updated
- 2024-10-15
Frequently asked questions
- What is Caroline Day's NPI number?
- Caroline Day's National Provider Identifier (NPI) is 1093860652, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Caroline Day's specialty?
- Caroline Day is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Caroline Day located?
- Caroline Day's practice location on file with NPPES is 4525 Scott Ave, Saint Louis, MO 63110-1030.
- What is Caroline Day's phone number?
- The practice phone number listed in the NPPES registry for Caroline Day is (314) 362-3523.
- Does Caroline Day accept Medicare?
- Caroline Day is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Caroline Day's NPI active?
- Yes — Caroline Day's NPI (1093860652) is active in the NPPES registry as of the last update on 2024-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.