MARK D. LARSON, M.D., P.A.
NPI 1245489103
Clinic/Center - Ambulatory Surgical in Beaumont, TX
About Mark D. Larson, M.d., P.a. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK D. LARSON, M.D., P.A. (NPI 1245489103) is a healthcare organization registered as an ambulatory surgical in Beaumont, Texas and active in the NPI registry since September 2008. The organization lists Mark Larson, Physician, 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)
Mark D. Larson, M.d., P.a. 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 Mark D. Larson, M.D., P.A., 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 Mark D. Larson, M.D., P.A.'s NPI number?
The NPI number for Mark D. Larson, M.D., P.A. is 1245489103. It was assigned to this organization in the NPPES registry on September 16, 2008.
Where is Mark D. Larson, M.D., P.A. located?
Mark D. Larson, M.D., P.A. is located at 950 N 11th St, Beaumont, TX 77702. The listed phone number is (409) 833-0193.
What is Mark D. Larson, M.D., P.A.'s specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Ambulatory Surgical, with taxonomy code 261QA1903X.
Is Mark D. Larson, M.D., P.A. enrolled in Medicare?
Yes. Mark D. Larson, M.D., P.A. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Mark D. Larson, M.D., P.A.?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Plastic and Reconstructive Surgery) reassigns their Medicare billing to Mark D. Larson, M.D., P.A.. 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 Mark D. Larson, M.D., P.A. was last updated on March 30, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Mark D. Larson, M.d., P.a. · NPI 1245489103
Ambulatory Surgical organization in Beaumont, Texas. Organization record, active in the CMS NPPES registry since September 16, 2008.
## Identity
- **NPI:** 1245489103 (Entity type: Organization)
- **Enumerated:** September 16, 2008
- **Primary specialty:** Clinic/Center - Ambulatory Surgical · taxonomy 261QA1903X
- **Organization subpart:** No
- **Authorized official:** Mark Larson, PHYSICIAN
## Practice location
- **Address:** 950 N 11TH ST, Beaumont, TX 77702-1203
- **Phone:** (409) 833-0193
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Plastic and Reconstructive Surgery) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 30, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1245489103) · Data from the CMS NPPES public registry.