JAMES ALLEN NELSON MD
NPI 1336155605
Emergency Medicine in San Diego, CA
About James Allen Nelson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JAMES ALLEN NELSON MD (NPI 1336155605) is an individual emergency medicine provider in San Diego, California, licensed in California (A84468) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2002).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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 and accepts Medicare assignment
James Allen Nelson 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 James Nelson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 221 clinicians in this Medicare group
Chula Vista, CA 91911
- Reassigned Medicare billing, California enrollment
- 1,204 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 8
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 92103 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.
SAN DIEGO, CA 92103
SAN DIEGO, CA 92103
SAN DIEGO, CA 92103
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 James Nelson's NPI number?
The NPI number for James Nelson is 1336155605. It was assigned to this individual provider in the NPPES registry on July 31, 2006.
Where is James Nelson located?
James Nelson practices at 200 W Arbor Dr, San Diego, CA 92103. The listed phone number is (800) 926-8273.
What is James Nelson's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is James Nelson enrolled in Medicare?
Yes. James Nelson 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 James Nelson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), James Nelson reassigns Medicare benefits to 2 organizations: Regents Of The University Of California (San Diego, CA) and Cep America - California (Chula Vista, CA). 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 James Nelson'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 James Nelson was last updated on September 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 41 days 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.
# James Allen Nelson, MD · NPI 1336155605
Emergency Medicine physician in San Diego, California. Individual provider, active in the CMS NPPES registry since July 31, 2006.
## Identity
- **NPI:** 1336155605 (Entity type: Individual)
- **Enumerated:** July 31, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A84468 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 W ARBOR DR, San Diego, CA 92103-9000
- **Phone:** (800) 926-8273
## 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): Regents Of The University Of California (NPI 1780870899, San Diego, CA); Cep America - California (NPI 1457304529, Chula Vista, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2002
## Record status
- **NPPES last updated:** September 9, 2026
- **Other identifiers:** Medicaid 00A844680 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1336155605) · Data from the CMS NPPES public registry.