John Mayo
NPI 1558723049 · Emergency Medicine Physician · Lexington, KY
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Mayo is a Emergency Medicine Physician provider in Lexington, KY (NPI 1558723049).
Provider details
- NPI number
- 1558723049
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- R4134 (KY)
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
10 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
780 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 529 | $176 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 188 | $121 |
| Critical Care, First 30-74 Minutes99291 | 37 | $212 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 26 | $71 |
Typical Medicare-allowed amounts for these services range $71–$212 (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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 92 | 89 |
| Methylprednisolone | 81 | 79 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 66 | 66 |
| Cefdinir | 52 | 49 |
| Doxycycline Hyclate | 52 | 49 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 28 | 28 |
| Ketorolac Tromethamine | 25 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-03-23
- Last updated
- 2017-07-05
Frequently asked questions
- What is John Mayo's NPI number?
- John Mayo's National Provider Identifier (NPI) is 1558723049, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Mayo's specialty?
- John Mayo is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Mayo located?
- John Mayo's practice location on file with NPPES is University of Kentucky 800 Rose St, Lexington, KY 40536-7001.
- What is John Mayo's phone number?
- The practice phone number listed in the NPPES registry for John Mayo is (859) 323-6762.
- Does John Mayo accept Medicare?
- John Mayo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Mayo's NPI active?
- Yes — John Mayo's NPI (1558723049) is active in the NPPES registry as of the last update on 2017-07-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.