MARY AMELIA WALKER CRNP
NPI 1881281350
Nurse Practitioner - Family in Bel Air, MD
About Mary Amelia Walker Crnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY AMELIA WALKER CRNP (NPI 1881281350) is an individual family provider in Bel Air, Maryland, licensed in Maryland (R158089) and active in the NPI registry since December 2020. She is enrolled in Medicare PECOS, is affiliated with Greater Baltimore Medical Center, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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
Mary Amelia Walker Crnp 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
2Medicare enrollment records show Mary Walker reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Bel Air, MD 21015
- Reassigned Medicare billing, Maryland enrollment
- 444 clinicians in this Medicare group
Towson, MD 21286
- Reassigned Medicare billing, Maryland enrollment
- 664 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 3
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.
Greater Baltimore Medical Center
Acute Care Hospitals · Baltimore, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21014 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 15
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BEL AIR, MD 21014
BEL AIR, MD 21014
BEL AIR, MD 21014
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 Mary Walker's NPI number?
The NPI number for Mary Walker is 1881281350. It was assigned to this individual provider in the NPPES registry on December 30, 2020.
Where is Mary Walker located?
Mary Walker practices at 520 Upper Chesapeake Dr Ste 301, Bel Air, MD 21014. The listed phone number is (410) 939-3121.
What is Mary Walker's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Mary Walker enrolled in Medicare?
Yes. Mary Walker 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 Mary Walker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Walker reassigns Medicare benefits to 2 organizations: Greater Baltimore Medical Center, Inc. (Bel Air, MD) and Sinai Hospital Of Baltimore Inc (Towson, MD). 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 Mary Walker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Mary Walker affiliated with any hospitals?
According to CMS data, Mary Walker is affiliated with Greater Baltimore Medical Center.
When was this NPI record last updated?
The NPPES record for Mary Walker was last updated on August 12, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Mary Amelia Walker, CRNP · NPI 1881281350
Family physician in Bel Air, Maryland. Individual provider, active in the CMS NPPES registry since December 30, 2020.
## Identity
- **NPI:** 1881281350 (Entity type: Individual)
- **Enumerated:** December 30, 2020
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** R158089 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 520 UPPER CHESAPEAKE DR STE 301, Bel Air, MD 21014-4375
- **Phone:** (410) 939-3121
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Greater Baltimore Medical Center, Inc. (NPI 1154270262, Bel Air, MD); Sinai Hospital Of Baltimore Inc (NPI 1669182499, Towson, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** August 12, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1881281350) · Data from the CMS NPPES public registry.