MS. MARY KATHERINE GAST CRNP
NPI 1396963609
Nurse Practitioner - Adult Health in Georgetown, DE
About Ms. Mary Katherine Gast Crnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. MARY KATHERINE GAST CRNP (NPI 1396963609) is an individual adult health provider in Georgetown, Delaware, licensed in Maryland (R157914) and active in the NPI registry since April 2007. She is enrolled in Medicare PECOS.
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 (PECOS)
Ms. Mary Katherine Gast Crnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Mary Gast reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Glen Burnie, MD 21061
- Reassigned Medicare billing, Maryland enrollment
- 57 clinicians in this Medicare group
Glen Burnie, MD 21061
- Reassigned Medicare billing, Maryland enrollment
- 966 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19947 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 5
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Gast's NPI number?
The NPI number for Mary Gast is 1396963609. It was assigned to this individual provider in the NPPES registry on April 23, 2007.
Where is Mary Gast located?
Mary Gast practices at 21748 Roth Ave, Georgetown, DE 19947. The listed phone number is (800) 461-8262.
What is Mary Gast's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.
Is Mary Gast enrolled in Medicare?
Yes. Mary Gast is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mary Gast's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Gast reassigns Medicare benefits to 2 organizations: Baltimore Washington Medical Center Inc. (Glen Burnie, MD) and University Of Maryland Community Medical Group, Inc. (Glen Burnie, 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 Gast'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 Mary Gast was last updated on February 15, 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.
# Ms. Mary Katherine Gast, CRNP · NPI 1396963609
Adult Health physician in Georgetown, Delaware. Individual provider, active in the CMS NPPES registry since April 23, 2007.
## Identity
- **NPI:** 1396963609 (Entity type: Individual)
- **Enumerated:** April 23, 2007
- **Primary specialty:** Nurse Practitioner - Adult Health · taxonomy 363LA2200X
- **State license:** R157914 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 21748 ROTH AVE, Georgetown, DE 19947-3239
- **Phone:** (800) 461-8262 · **Fax:** (302) 633-5379
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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): Baltimore Washington Medical Center Inc. (NPI 1740469774, Glen Burnie, MD); University Of Maryland Community Medical Group, Inc. (NPI 1295367894, Glen Burnie, MD) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 15, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1396963609) · Data from the CMS NPPES public registry.