Mary Day, DO
NPI 1881823961 · Family Medicine Physician · Rochester, NY
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Day, DO is a Family Medicine Physician provider in Rochester, NY (NPI 1881823961).
Provider details
- NPI number
- 1881823961
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 259874 (NY)
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
16 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
116 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 65 | $94 |
| 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 | 29 | $16 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 22 | $124 |
Typical Medicare-allowed amounts for these services range $16–$124 (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 · 111 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 439 | 135 |
| Amlodipine Besylate | 293 | 80 |
| Levothyroxine Sodium | 232 | 57 |
| Omeprazole | 150 | 45 |
| Losartan Potassium | 138 | 45 |
| Metformin Hclbrand: Metformin Hcl Er | 130 | 41 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-07-09
- Last updated
- 2013-09-05
Frequently asked questions
- What is Mary Day's NPI number?
- Mary Day's National Provider Identifier (NPI) is 1881823961, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Day's specialty?
- Mary Day is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Day located?
- Mary Day's practice location on file with NPPES is 800 Carter St, Rochester, NY 14621-2604.
- What is Mary Day's phone number?
- The practice phone number listed in the NPPES registry for Mary Day is (585) 338-1200.
- Does Mary Day accept Medicare?
- Mary Day is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Day's NPI active?
- Yes — Mary Day's NPI (1881823961) is active in the NPPES registry as of the last update on 2013-09-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.