DR. JONATHAN ALAN DAY MD
NPI 1851475024
Anesthesiology in Jacksonville, FL
About Dr. Jonathan Alan Day Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JONATHAN ALAN DAY MD (NPI 1851475024) is an individual anesthesiology provider in Jacksonville, Florida, licensed in Florida (ME109763) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Mayo Clinic, and maintains a secondary practice location in Eglin Afb.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Jonathan Alan Day Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Jonathan Day reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Jacksonville, FL 32224
- Reassigned Medicare billing, Florida enrollment
- 1,828 clinicians in this Medicare group
Melville, NY 11747
- Reassigned Medicare billing, Florida enrollment
- 628 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mayo Clinic
Acute Care Hospitals · Jacksonville, FLMedicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
JACKSONVILLE, FL 32224
JACKSONVILLE, FL 32224
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Jonathan Day's NPI number?
The NPI number for Jonathan Day is 1851475024. It was assigned to this individual provider in the NPPES registry on October 25, 2006.
Where is Jonathan Day located?
Jonathan Day practices at 4500 San Pablo Rd S, Jacksonville, FL 32224. The listed phone number is (904) 953-2000.
What is Jonathan Day's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Jonathan Day enrolled in Medicare?
Yes. Jonathan Day is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Jonathan Day's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jonathan Day reassigns Medicare benefits to 2 organizations: Mayo Clinic Jacksonville (Jacksonville, FL) and American Anesthesiology Services Of Florida, Inc. (Melville, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Jonathan Day's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Jonathan Day accept?
Health plans from Oscar Health, Oscar Health Maintenance Organization of Florida and Oscar Insurance Company list Jonathan Day as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Jonathan Day affiliated with any hospitals?
According to CMS data, Jonathan Day is affiliated with Mayo Clinic.
When was this NPI record last updated?
The NPPES record for Jonathan Day was last updated on October 11, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Jonathan Alan Day, MD · NPI 1851475024
Anesthesiology physician in Jacksonville, Florida. Individual provider, active in the CMS NPPES registry since October 25, 2006.
## Identity
- **NPI:** 1851475024 (Entity type: Individual)
- **Enumerated:** October 25, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** ME109763 (Florida)
- **Sole proprietor:** No
## Practice location
- **Address:** 4500 SAN PABLO RD S, Jacksonville, FL 32224-1865
- **Phone:** (904) 953-2000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Mayo Clinic Jacksonville (NPI 1174143986, Jacksonville, FL); American Anesthesiology Services Of Florida, Inc. (NPI 1508318387, Melville, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Uniformed Services Uhs Fe Hebert School Of Med, class of 2005
## Record status
- **NPPES last updated:** October 11, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1851475024) · Data from the CMS NPPES public registry.