MICHAEL S. NELSON MD
NPI 1679665004
Pediatrics in San Diego, CA
About Michael S. Nelson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHAEL S. NELSON MD (NPI 1679665004) is an individual pediatrics provider in San Diego, California, licensed in California (C51627) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Michael S. Nelson Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Michael Nelson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Diego, CA 92120
- Reassigned Medicare billing, California enrollment
- 13,921 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92120 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 92120
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 Michael Nelson's NPI number?
The NPI number for Michael Nelson is 1679665004. It was assigned to this individual provider in the NPPES registry on September 30, 2006.
Where is Michael Nelson located?
Michael Nelson practices at 4647 Zion Ave, San Diego, CA 92120. The listed phone number is (619) 528-5000.
What is Michael Nelson's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Michael Nelson enrolled in Medicare?
Yes. Michael Nelson is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Michael Nelson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Nelson reassigns Medicare benefits to Southern California Permanente Medical Group (San Diego, CA). The 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 Michael 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 Michael Nelson was last updated on November 29, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Michael S. Nelson, MD · NPI 1679665004
Pediatrics physician in San Diego, California. Individual provider, active in the CMS NPPES registry since September 30, 2006.
## Identity
- **NPI:** 1679665004 (Entity type: Individual)
- **Enumerated:** September 30, 2006
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** C51627 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4647 ZION AVE, San Diego, CA 92120-2507
- **Phone:** (619) 528-5000
## 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:** Southern California Permanente Medical Group (NPI 1225060742, San Diego, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 29, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1679665004) · Data from the CMS NPPES public registry.