DR. MARK EVANS FLEMING DO
NPI 1881638583
Orthopaedic Surgery - Orthopaedic Trauma in Los Angeles, CA
About Dr. Mark Evans Fleming Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK EVANS FLEMING DO (NPI 1881638583) is an individual orthopaedic trauma provider in Los Angeles, California, licensed in California (14334) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Apple Valley, and is a graduate of Other (1999).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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
Dr. Mark Evans Fleming Do 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
3Medicare enrollment records show Mark Fleming reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Apple Valley, CA 92307
- Reassigned Medicare billing, California enrollment
- 19 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 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.
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.
LOS ANGELES, CA 90089
LOS ANGELES, CA 90089
LOS ANGELES, CA 90089
LOS ANGELES, CA 90089
LOS ANGELES, CA 90089
LOS ANGELES, CA 90089
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 Fleming's NPI number?
The NPI number for Mark Fleming is 1881638583. It was assigned to this individual provider in the NPPES registry on June 15, 2006.
Where is Mark Fleming located?
Mark Fleming practices at 1200 N State St, Los Angeles, CA 90089. The listed phone number is (301) 956-0583.
What is Mark Fleming's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Orthopaedic Trauma, with taxonomy code 207XX0801X.
Is Mark Fleming enrolled in Medicare?
Yes. Mark Fleming 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 Mark Fleming's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Fleming reassigns Medicare benefits to 3 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), Paul J Wisniewski Do Inc (Apple Valley, CA) and The General Hospital Corporation (Boston, MA). 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 Mark Fleming'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 Mark Fleming was last updated on September 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Dr. Mark Evans Fleming, DO · NPI 1881638583
Orthopaedic Trauma physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since June 15, 2006.
## Identity
- **NPI:** 1881638583 (Entity type: Individual)
- **Enumerated:** June 15, 2006
- **Primary specialty:** Orthopaedic Surgery - Orthopaedic Trauma · taxonomy 207XX0801X
- **State license:** 14334 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1200 N STATE ST, Los Angeles, CA 90089-1001
- **Phone:** (301) 956-0583
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); Paul J Wisniewski Do Inc (NPI 1780433698, Apple Valley, CA); The General Hospital Corporation (NPI 1023049236, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1999
## Record status
- **NPPES last updated:** September 12, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1881638583) · Data from the CMS NPPES public registry.