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MARYLAND PROTON TREATMENT CENTER, LLC
NPI 1255742375
Clinic/Center in Baltimore, MD

Active since May 12, 2014
850 W BALTIMORE ST, BALTIMORE, MD 21201(410) 369-5200(410) 347-0870 Get Directions Write a Review

NPPES record last updated: March 10, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 10, 2025, Feb 25, 2020, Jan 11, 2016 (3 updates tracked since 2016).

About Maryland Proton Treatment Center, Llc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARYLAND PROTON TREATMENT CENTER, LLC (NPI 1255742375), doing business as Maryland Proton Treatment Center, is a healthcare organization registered as a clinic/center in Baltimore, Maryland and active in the NPI registry since May 2014. The organization lists Shareef Mostafa Batata, Chief Financial Officer, as its authorized official.

NPPES Registry Identity

NPI1255742375
Entity TypeOrganization
Primary Taxonomy261Q00000X
Legal Business NameMARYLAND PROTON TREATMENT CENTER, LLC
Location Address850 W BALTIMORE STBaltimore, MD 21201-1110
Mailing AddressPo Box 65034Baltimore, MD 21264-5034 · (410) 706-4919 · Fax (410) 706-6729
Phone(410) 369-5200
Fax(410) 347-0870
Organization SubpartYesParent: Maryland Proton Treatment Holdings, Llc
Authorized OfficialShareef Mostafa BatataChief Financial Officer · (914) 233-3520
Enumeration DateMay 12, 2014
Last NPPES UpdateMarch 10, 20253 updates tracked since enumeration
NPPES CertifiedMarch 10, 2025
✔ NPI 1255742375 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyClinic/CenterAmbulatory Health Care Facilities
Taxonomy Code261Q00000X
License✔ Licensed in MD · MM483
Definition
A facility or distinct part of one used for the diagnosis and treatment of outpatients. Clinic/Center is irregularly defined, sometimes being limited to organizations serving specialized treatment requirements or distinct patient/client groups (e.g., radiology, poor, and public health).
Also ListedClinic/Center · RadiologyTaxonomy 261QR0200X · License MM483 (MD)
Also ListedClinic/Center · Oncology, RadiationTaxonomy 261QX0203X · License MM483 (MD)
850 W BALTIMORE ST, Baltimore, MD 21201
Open in Google Maps ↗

Other Names 1

Doing Business AsMaryland Proton Treatment Center

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Maryland Proton Treatment Center, Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

53

Medicare enrollment records show 53 clinicians reassign Medicare billing to Maryland Proton Treatment Center, LLC, which bills Medicare for the services they deliver. Of these, 5 practice at this address and 21 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 2

Radiation Oncology43
Nurse Practitioner10

Nearest to this location (20)

See all 53
Katarina Steacy, CRNP
Nurse Practitioner
NPI 1225284383
850 W BALTIMORE ST
Baltimore, MD 21201
(410) 369-5200
✔ PECOS✔ Accepts MedicareSame address
Michelle Turner, CRNP
Nurse Practitioner
NPI 1538109954
850 W BALTIMORE ST
Baltimore, MD 21201
(410) 369-5200
✔ PECOSSame address
Zaker Rana, M.D.
Radiation Oncology
NPI 1104213578
850 W BALTIMORE ST
Baltimore, MD 21201
(410) 369-5200
✔ PECOS✔ Accepts MedicareSame address
Avani Rao, M.D.
Radiation Oncology
NPI 1295006567
850 W BALTIMORE ST
Baltimore, MD 21201
(410) 369-5200
✔ PECOS✔ Accepts MedicareSame address
Sarah Somers, FNP-BC
Nurse Practitioner
NPI 1134643539
850 W BALTIMORE ST
Baltimore, MD 21201
(410) 369-5200
✔ PECOS✔ Accepts MedicareSame address
Pradip Amin, M.D.
Radiation Oncology
NPI 1215961727
22 S GREENE ST GUDELSKY BASEMENT
Baltimore, MD 21201
(410) 328-3037
✔ PECOS✔ Accepts Medicare0.3 mi
Sarah Boilon, CRNP
Nurse Practitioner
NPI 1306498324
22 S GREENE ST
Baltimore, MD 21201
(410) 328-6080
✔ PECOS✔ Accepts Medicare0.3 mi
Young Kwok, M.D.
Radiation Oncology
NPI 1215941901
22 S GREENE ST GUDELSKY BASEMENT
Baltimore, MD 21201
(410) 328-3037
✔ PECOS✔ Accepts Medicare0.3 mi
Melissa Vyfhuis, MD, PHD
Radiation Oncology
NPI 1801214689
22 S GREENE ST RM N3E09
Baltimore, MD 21201
(410) 328-2361
✔ PECOS✔ Accepts Medicare0.3 mi
William Regine, M.D.
Radiation Oncology
NPI 1104831957
22 S GREENE ST GUDELSKY BASEMENT
Baltimore, MD 21201
(410) 328-3037
✔ PECOS✔ Accepts Medicare0.3 mi
Martha Francis, CRNP
Nurse Practitioner
NPI 1952348922
22 S GREENE ST GUDELSKY BASEMENT
Baltimore, MD 21201
(410) 328-3037
✔ PECOS✔ Accepts Medicare0.3 mi
Tiffani Tyer, CRNP
Nurse Practitioner
NPI 1609881382
22 S GREENE ST GUDELSKY BASEMENT
Baltimore, MD 21201
(410) 328-3037
✔ PECOS✔ Accepts Medicare0.3 mi
Catherine Casey, CRNP
Nurse Practitioner
NPI 1477192615
22 S GREENE ST
Baltimore, MD 21201
(410) 328-8667
✔ PECOS✔ Accepts Medicare0.4 mi
Michael Kim, MD
Radiation Oncology
NPI 1841979333
22 S GREENE ST
Baltimore, MD 21201
(410) 328-6080
✔ PECOS✔ Accepts Medicare0.4 mi
Philip Mcdonagh, MD, PHD
Radiation Oncology
NPI 1003308412
22 S GREENE ST
Baltimore, MD 21201
(410) 328-6080
✔ PECOS✔ Accepts Medicare0.4 mi
Susan Otremba, CRNP
Nurse Practitioner
NPI 1225248727
22 S GREENE ST
Baltimore, MD 21201
(410) 328-6196
✔ PECOS0.4 mi
Keara English, MD
Radiation Oncology
NPI 1609496181
401 N BROADWAY ST
Baltimore, MD 21287
(410) 955-7390
✔ PECOS✔ Accepts Medicare2.0 mi
Talya Laufer, MD
Radiation Oncology
NPI 1639708217
4940 EASTERN AVE
Baltimore, MD 21224
(410) 550-5568
✔ PECOS4.5 mi
Yun Zhang, CRNP
Nurse Practitioner
NPI 1558614859
7505 OSLER DR STE 312
Towson, MD 21204
(410) 828-8005
✔ PECOS✔ Accepts Medicare6.9 mi
Jason Molitoris, M.D.
Radiation Oncology
NPI 1265876973
6565 N CHARLES ST STE 203
Baltimore, MD 21204
(443) 849-3760
✔ PECOS✔ Accepts Medicare6.9 mi
See all 53 clinicians

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 Maryland Proton Treatment Center, LLC's NPI number?

The NPI number for Maryland Proton Treatment Center, LLC is 1255742375. It was assigned to this organization in the NPPES registry on May 12, 2014. The provider is doing business as Maryland Proton Treatment Center.

Where is Maryland Proton Treatment Center, LLC located?

Maryland Proton Treatment Center, LLC is located at 850 W Baltimore St, Baltimore, MD 21201. The listed phone number is (410) 369-5200.

What is Maryland Proton Treatment Center, LLC's specialty?

The primary specialty registered for this NPI is Clinic/Center with taxonomy code 261Q00000X.

Is Maryland Proton Treatment Center, LLC enrolled in Medicare?

Yes. Maryland Proton Treatment Center, LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Maryland Proton Treatment Center, LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 53 clinicians in 2 Medicare specialties reassign their Medicare billing to Maryland Proton Treatment Center, LLC. 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 Radiation Oncology (43) and Nurse Practitioner (10). Of these, 5 practice at this address and 21 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 Maryland Proton Treatment Center, LLC was last updated on March 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.