RICHARD BARTON DAY MD
NPI 1386716959
Internal Medicine in Oceanside, CA
About Richard Barton Day Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RICHARD BARTON DAY MD (NPI 1386716959) is an individual internal medicine provider in Oceanside, California, licensed in Tennessee (66794) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Richard Barton Day Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Richard Day reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Bernardino, CA 92404
- Reassigned Medicare billing, California enrollment
- 1,216 clinicians in this Medicare group
West Hollywood, CA 90048
- Reassigned Medicare billing, California enrollment
- 175 clinicians in this Medicare group
Apple Valley, CA 92307
- Reassigned Medicare billing, California enrollment
- 914 clinicians in this Medicare group
Oak Ridge, TN 37830
- Reassigned Medicare billing, Tennessee enrollment
- 1,085 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 2
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92056 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.
Reported Quality Measures
Other Providers at the Same Location NPPES 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
OCEANSIDE, CA 92056
OCEANSIDE, CA 92056
OCEANSIDE, CA 92056
OCEANSIDE, CA 92056
OCEANSIDE, CA 92056
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 Richard Day's NPI number?
The NPI number for Richard Day is 1386716959. It was assigned to this individual provider in the NPPES registry on November 15, 2006. The provider is also known as Bart Day MD.
Where is Richard Day located?
Richard Day practices at 3156 Vista Way 405, Oceanside, CA 92056. The listed phone number is (760) 439-6581.
What is Richard Day's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Richard Day enrolled in Medicare?
Yes. Richard Day is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Richard Day's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Richard Day reassigns Medicare benefits to 4 organizations: Inpatient Specialists Of California, PC (San Bernardino, CA), Kansal Inc (West Hollywood, CA), Hospitalist Medicine Physicians Of California, Inc (Apple Valley, CA) and Southeastern Physician Services PC (Oak Ridge, TN). 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 Richard Day's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Richard Day was last updated on October 2, 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.
# Richard Barton Day, MD · NPI 1386716959
Internal Medicine physician in Oceanside, California. Individual provider, active in the CMS NPPES registry since November 15, 2006.
## Identity
- **NPI:** 1386716959 (Entity type: Individual)
- **Enumerated:** November 15, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 66794 (Tennessee)
- **Sole proprietor:** No
## Practice location
- **Address:** 3156 VISTA WAY, 405, Oceanside, CA 92056-3622
- **Phone:** (760) 439-6581
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Inpatient Specialists Of California, PC (NPI 1952792475, San Bernardino, CA); Kansal Inc (NPI 1043510183, West Hollywood, CA); Hospitalist Medicine Physicians Of California, Inc (NPI 1184663965, Apple Valley, CA); Southeastern Physician Services PC (NPI 1083835441, Oak Ridge, TN) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 2, 2024
- **Other identifiers:** Medicaid 00A452980 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1386716959) · Data from the CMS NPPES public registry.