JOHN ROBERT DAYTON MD
NPI 1285801704
Emergency Medicine in Stanford, CA
About John Robert Dayton Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN ROBERT DAYTON MD (NPI 1285801704) is an individual emergency medicine provider in Stanford, California, licensed in California (C171586) and active in the NPI registry since May 2008. He is enrolled in Medicare PECOS, is affiliated with American Fork Hospital, and maintains a secondary practice location in Salt Lake City.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
John Robert Dayton 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
7Medicare enrollment records show John Dayton reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stanford, CA 94305
- Reassigned Medicare billing, California enrollment
- 4,258 clinicians in this Medicare group
Palo Alto, CA 94304
- Reassigned Medicare billing, California enrollment
- 3,617 clinicians in this Medicare group
Palo Alto, CA 94306
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1588721500 (California), NPI 1629301346 (California)
- 2,460 clinicians in this Medicare group
American Fork, UT 84003
- Reassigned Medicare billing, Utah enrollment
- 21 clinicians in this Medicare group
Polacca, AZ 86042
- Reassigned Medicare billing, Texas enrollment
- 199 clinicians in this Medicare group
Pinon, AZ 86510
- Reassigned Medicare billing, Texas enrollment
- 476 clinicians in this Medicare group
Vernal, UT 84078
- Reassigned Medicare billing, Utah enrollment
- 24 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 3
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.
American Fork Hospital
Acute Care Hospitals · American Fork, UTPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94305 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare 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.
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
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 John Dayton's NPI number?
The NPI number for John Dayton is 1285801704. It was assigned to this individual provider in the NPPES registry on May 14, 2008.
Where is John Dayton located?
John Dayton practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-4000.
What is John Dayton's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is John Dayton enrolled in Medicare?
Yes. John Dayton 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 John Dayton's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Dayton reassigns Medicare benefits to 7 organizations: Stanford Health Care (Stanford, CA), Lpch Medical Group Div Of Lucile (Palo Alto, CA), County Of Santa Clara (Palo Alto, CA), North Valley Emergency Physicians Lc (American Fork, UT), Dhhs Ihs Phoenix Area (Polacca, AZ) and 2 more organizations, listed in the Medicare section above. 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 John Dayton's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is John Dayton affiliated with any hospitals?
According to CMS data, John Dayton is affiliated with American Fork Hospital.
When was this NPI record last updated?
The NPPES record for John Dayton was last updated on March 19, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# John Robert Dayton, MD · NPI 1285801704
Emergency Medicine physician in Stanford, California. Individual provider, active in the CMS NPPES registry since May 14, 2008.
## Identity
- **NPI:** 1285801704 (Entity type: Individual)
- **Enumerated:** May 14, 2008
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** C171586 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 PASTEUR DR, Stanford, CA 94305-2200
- **Phone:** (650) 723-4000
## 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:** 7 organizations under Medicare reassignment (form CMS-855R): Stanford Health Care (NPI 1437292927, Stanford, CA); Lpch Medical Group Div Of Lucile (NPI 1417907940, Palo Alto, CA); County Of Santa Clara (NPI 1144330614, Palo Alto, CA); North Valley Emergency Physicians Lc (NPI 1134177876, American Fork, UT); Dhhs Ihs Phoenix Area (NPI 1356628028, Polacca, AZ); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** George Washington University School Of Medicine, class of 2006
## Record status
- **NPPES last updated:** March 19, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1285801704) · Data from the CMS NPPES public registry.