Katherine Day, M.D.
NPI 1598836801 · Otolaryngology Physician · Bel Air, MD
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Day, M.D. is a Otolaryngology Physician provider in Bel Air, MD (NPI 1598836801).
Provider details
- NPI number
- 1598836801
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- D0058518 (MD)
Specialties & taxonomies
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
4,395 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 782 | $94 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 739 | $131 |
| Removal of Impacted Ear Wax69210 | 682 | $49 |
| Professional Service for Preparation and Provision of 1 Or More Antigens95165 | 500 | $15 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 361 | $59 |
| Professional Service for Multiple Injections of Allergen95117 | 253 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone Propionate | 314 | 144 |
| Montelukast Sodium | 296 | 101 |
| Ipratropium Bromide | 105 | 51 |
| Prednisone | 79 | 64 |
| Omeprazole | 77 | 33 |
| Famotidine | 58 | 25 |
| Mometasone Furoate | 57 | 43 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$308 across 10 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
- 2006-11-10
- Last updated
- 2015-03-25
Frequently asked questions
- What is Katherine Day's NPI number?
- Katherine Day's National Provider Identifier (NPI) is 1598836801, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Day's specialty?
- Katherine Day is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Day located?
- Katherine Day's practice location on file with NPPES is 520 Upper Chesapeake Dr, Bel Air, MD 21014-4339.
- What is Katherine Day's phone number?
- The practice phone number listed in the NPPES registry for Katherine Day is (410) 879-9100.
- Does Katherine Day accept Medicare?
- Katherine Day is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Day's NPI active?
- Yes — Katherine Day's NPI (1598836801) is active in the NPPES registry as of the last update on 2015-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.