SENIOR DOC MEDICAL PC
NPI 1578407359
Family Medicine in Santa Ana, CA
About Senior Doc Medical Pc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SENIOR DOC MEDICAL PC (NPI 1578407359) is a healthcare organization registered as a family medicine in Santa Ana, California and active in the NPI registry since April 2026. The organization lists John Geiss, Ceo, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Senior Doc Medical Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Senior Doc Medical PC, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Senior Doc Medical PC's NPI number?
The NPI number for Senior Doc Medical PC is 1578407359. It was assigned to this organization in the NPPES registry on April 14, 2026.
Where is Senior Doc Medical PC located?
Senior Doc Medical PC is located at 5 Hutton Centre Dr Ste 950, Santa Ana, CA 92707. The listed phone number is (855) 434-7663.
What is Senior Doc Medical PC's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Senior Doc Medical PC enrolled in Medicare?
Yes. Senior Doc Medical PC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Senior Doc Medical PC?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Hospitalist) reassigns their Medicare billing to Senior Doc Medical PC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Senior Doc Medical PC was last updated on April 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.
# Senior Doc Medical Pc · NPI 1578407359
Family Medicine organization in Santa Ana, California. Organization record, active in the CMS NPPES registry since April 14, 2026.
## Identity
- **NPI:** 1578407359 (Entity type: Organization)
- **Enumerated:** April 14, 2026
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **Organization subpart:** No
- **Authorized official:** John Geiss, CEO
## Practice location
- **Address:** 5 HUTTON CENTRE DR STE 950, Santa Ana, CA 92707-8744
- **Phone:** (855) 434-7663 · **Fax:** (949) 281-5550
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Hospitalist) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 14, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1578407359) · Data from the CMS NPPES public registry.