MARGARET WALKUP ARNOLD M.D.
NPI 1043439268
Surgery - Vascular Surgery in Baltimore, MD
About Margaret Walkup Arnold M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET WALKUP ARNOLD M.D. (NPI 1043439268) is an individual vascular surgery provider in Baltimore, Maryland, licensed in New York (60 251976) and active in the NPI registry since April 2007. She is enrolled in Medicare PECOS, is affiliated with Medstar Franklin Square Medical Center, and is a graduate of Other (2002).
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 and accepts Medicare assignment
Margaret Walkup Arnold M.d. 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 Margaret Arnold reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21224
- Reassigned Medicare billing, Maryland enrollment
- 4,483 clinicians in this Medicare group
Baltimore, MD 21239
- Reassigned Medicare billing, Maryland enrollment
- 2,602 clinicians in this Medicare group
Washington, DC 20010
- Reassigned Medicare billing, Maryland enrollment
- 184 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.
Areas of Expertise CMS Part B claims 7
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Medstar Franklin Square Medical Center
Acute Care Hospitals · Rosedale, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21224 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
BALTIMORE, MD 21224
BALTIMORE, MD 21224
BALTIMORE, MD 21224
BALTIMORE, MD 21224
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 Margaret Arnold's NPI number?
The NPI number for Margaret Arnold is 1043439268. It was assigned to this individual provider in the NPPES registry on April 25, 2007.
Where is Margaret Arnold located?
Margaret Arnold practices at 4940 Eastern Ave, Baltimore, MD 21224. The listed phone number is (410) 550-4335.
What is Margaret Arnold's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Vascular Surgery, with taxonomy code 2086S0129X.
Is Margaret Arnold enrolled in Medicare?
Yes. Margaret Arnold 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 Margaret Arnold's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Arnold reassigns Medicare benefits to 3 organizations: Johns Hopkins University (Baltimore, MD), Medstar Medical Group II LLC (Baltimore, MD) and Medstar Heart Institute LLC (Washington, DC). 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 Margaret Arnold's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Margaret Arnold affiliated with any hospitals?
According to CMS data, Margaret Arnold is affiliated with Medstar Franklin Square Medical Center.
When was this NPI record last updated?
The NPPES record for Margaret Arnold was last updated on August 22, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Margaret Walkup Arnold, M.D. · NPI 1043439268
Vascular Surgery physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since April 25, 2007.
## Identity
- **NPI:** 1043439268 (Entity type: Individual)
- **Enumerated:** April 25, 2007
- **Primary specialty:** Surgery - Vascular Surgery · taxonomy 2086S0129X
- **State license:** 60 251976 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4940 EASTERN AVE, Baltimore, MD 21224-2735
- **Phone:** (410) 550-4335
## 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): Johns Hopkins University (NPI 1306810619, Baltimore, MD); Medstar Medical Group II LLC (NPI 1184046187, Baltimore, MD); Medstar Heart Institute LLC (NPI 1528345378, Washington, DC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2002
## Record status
- **NPPES last updated:** August 22, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1043439268) · Data from the CMS NPPES public registry.