GREATER BALTIMORE MEDICAL CENTER, INC.
NPI 1275355240
Internal Medicine - Gastroenterology in Lutherville, MD
About Greater Baltimore Medical Center, Inc. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREATER BALTIMORE MEDICAL CENTER, INC. (NPI 1275355240), doing business as Gbmc Gastroenterology At Jhh Greenspring Surgcenter, is a healthcare organization registered as a gastroenterology in Lutherville, Maryland and active in the NPI registry since October 2024. The organization lists Peter Carl Ostasewski, Cfo, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Greater Baltimore Medical Center, Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
443Medicare enrollment records show 443 clinicians reassign Medicare billing to Greater Baltimore Medical Center, Inc., which bills Medicare for the services they deliver. Of these, 301 practice within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 38
Nearest to this location (20)
See all 443Lutherville Timonium, MD 21093
Lutherville, MD 21093
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 Greater Baltimore Medical Center, Inc.'s NPI number?
The NPI number for Greater Baltimore Medical Center, Inc. is 1275355240. It was assigned to this organization in the NPPES registry on October 30, 2024. The provider is doing business as GBMC Gastroenterology at JHH Greenspring SurgCenter.
Where is Greater Baltimore Medical Center, Inc. located?
Greater Baltimore Medical Center, Inc. is located at 10803 Falls Rd Pavilion III Ste 3100, Lutherville, MD 21093. The listed phone number is (410) 616-7650.
What is Greater Baltimore Medical Center, Inc.'s specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Greater Baltimore Medical Center, Inc. enrolled in Medicare?
Yes. Greater Baltimore Medical Center, Inc. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Greater Baltimore Medical Center, Inc.?
According to the CMS Revalidation Reassignment List (October 2026 release), 443 clinicians in 38 Medicare specialties reassign their Medicare billing to Greater Baltimore Medical Center, Inc.. 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. The largest specialties are Nurse Practitioner (92), Hospitalist (50) and Internal Medicine (40). Of these, 301 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Greater Baltimore Medical Center, Inc. was last updated on July 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Greater Baltimore Medical Center, Inc. · NPI 1275355240
Gastroenterology organization in Lutherville, Maryland. Organization record, active in the CMS NPPES registry since October 30, 2024.
## Identity
- **NPI:** 1275355240 (Entity type: Organization)
- **Enumerated:** October 30, 2024
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **Also known as:** GBMC Gastroenterology at JHH Greenspring SurgCenter (Doing Business As)
- **Organization subpart:** No
- **Authorized official:** Peter Ostasewski, CFO
## Practice location
- **Address:** 10803 FALLS RD PAVILION III, STE 3100, Lutherville, MD 21093-4582
- **Phone:** (410) 616-7650
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 443 clinicians in 38 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (92), Hospitalist (50), Internal Medicine (40); 301 practice within 10 miles; [full list](https://npiprofile.com/npi/1275355240/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 24, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1275355240) · Data from the CMS NPPES public registry.