Michael Hayoun, M.D., M.PHIL
NPI 1679985105 · Medical Toxicology (Emergency Medicine) Physician · Nashville, TN
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Hayoun, M.D., M.PHIL is a Medical Toxicology (Emergency Medicine) Physician provider in Nashville, TN (NPI 1679985105).
Provider details
- NPI number
- 1679985105
- Entity type
- Individual
- Primary specialty
- Medical Toxicology (Emergency Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., M.PHIL
- Sex
- Male
- Sole proprietor
- Yes
- License
- MT206041 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
12 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
476 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 259 | $161 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 168 | $111 |
| Critical Care, First 30-74 Minutes99291 | 49 | $196 |
Typical Medicare-allowed amounts for these services range $111–$196 (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 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 58 | 57 |
| Prednisone | 49 | 48 |
| Cephalexin | 42 | 41 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 32 | 32 |
| Ibuprofen | 28 | 28 |
| Azithromycin | 25 | 25 |
| Cefdinir | 22 | 21 |
| Albuterol Sulfate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$70 across 2 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
Additional practice locations (2)
- 355 New Shackle Island RdHendersonville, TN 37075-2479Phone: (615) 338-1000
- 3441 Dickerson PikeNashville, TN 37207-2539Phone: (615) 769-2000
Registry dates
- Enumerated
- 2014-06-02
- Last updated
- 2025-01-22
- Certified
- 2025-01-22
Frequently asked questions
- What is Michael Hayoun's NPI number?
- Michael Hayoun's National Provider Identifier (NPI) is 1679985105, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Hayoun's specialty?
- Michael Hayoun is listed in the NPPES registry with a primary specialty of Medical Toxicology (Emergency Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Hayoun located?
- Michael Hayoun's practice location on file with NPPES is 3443 Dickerson Pike Ste 310, Nashville, TN 37207-2523.
- What is Michael Hayoun's phone number?
- The practice phone number listed in the NPPES registry for Michael Hayoun is (615) 645-3013.
- Does Michael Hayoun accept Medicare?
- Michael Hayoun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Hayoun's NPI active?
- Yes — Michael Hayoun's NPI (1679985105) is active in the NPPES registry as of the last update on 2025-01-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.