JACK STEWART MD INC
NPI 1891202529
Internal Medicine - Pulmonary Disease in Orange, CA
About Jack Stewart Md Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JACK STEWART MD INC (NPI 1891202529) is a healthcare organization registered as a pulmonary disease in Orange, California and active in the NPI registry since January 2018. The organization lists Jack O Stewart, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Jack Stewart Md Inc 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 Jack Stewart MD Inc, 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 Jack Stewart MD Inc's NPI number?
The NPI number for Jack Stewart MD Inc is 1891202529. It was assigned to this organization in the NPPES registry on January 3, 2018.
Where is Jack Stewart MD Inc located?
Jack Stewart MD Inc is located at 1010 W La Veta Ave Ste 750, Orange, CA 92868. The listed phone number is (949) 973-7389.
What is Jack Stewart MD Inc's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.
Is Jack Stewart MD Inc enrolled in Medicare?
Yes. Jack Stewart MD Inc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Jack Stewart MD Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Pulmonary Disease) reassigns their Medicare billing to Jack Stewart MD Inc. 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 Jack Stewart MD Inc was last updated on October 1, 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.
# Jack Stewart Md Inc · NPI 1891202529
Pulmonary Disease organization in Orange, California. Organization record, active in the CMS NPPES registry since January 3, 2018.
## Identity
- **NPI:** 1891202529 (Entity type: Organization)
- **Enumerated:** January 3, 2018
- **Primary specialty:** Internal Medicine - Pulmonary Disease · taxonomy 207RP1001X
- **Organization subpart:** No
- **Authorized official:** Jack Stewart, PRESIDENT
## Practice location
- **Address:** 1010 W LA VETA AVE STE 750, Orange, CA 92868-4312
- **Phone:** (949) 973-7389 · **Fax:** (714) 919-8804
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Pulmonary Disease) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 1, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1891202529) · Data from the CMS NPPES public registry.