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NELSON GUSTAVO NEDER KALIL, M.D.
NPI 1750569802
Internal Medicine - Hematology & Oncology in Rockville, MD

Active since January 31, 2008
6000 EXECUTIVE BLVD STE 620, ROCKVILLE, MD 20852(240) 467-5888(301) 348-8983 Get Directions Write a Review

NPPES record last updated: September 6, 2018. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Nelson Gustavo Neder Kalil, M.d. NPPES

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

NELSON GUSTAVO NEDER KALIL, M.D. (NPI 1750569802) is a healthcare organization registered as a hematology & oncology in Rockville, Maryland and active in the NPI registry since January 2008. The organization lists Nelson Gustavo Neder Kalil, President, as its authorized official.

NPPES Registry Identity

NPI1750569802
Entity TypeOrganization
Primary Taxonomy207RH0003X
Legal Business NameNELSON GUSTAVO NEDER KALIL, M.D.
Location Address6000 EXECUTIVE BLVD STE 620Rockville, MD 20852
Mailing Address6000 Executive Blvd Ste 620Rockville, MD 20852-3876 · (240) 467-5888 · Fax (301) 348-8983
Phone(240) 467-5888
Fax(301) 348-8983
Organization SubpartNo
Authorized OfficialNelson Gustavo Neder KalilPresident · (240) 467-5888
Enumeration DateJanuary 31, 2008
Last NPPES UpdateSeptember 6, 2018
✔ NPI 1750569802 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in MD · D0051616
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
6000 EXECUTIVE BLVD STE 620, Rockville, MD 20852
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Other Identifiers 1

Medicaid694501500MD

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X MULTIPLE SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Nelson Gustavo Neder Kalil, M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Nelson Gustavo Neder Kalil, M.D., which bills Medicare for the services this clinician delivers.

Clinician (1)

Nelson Kalil, M.D.
Hematology/Oncology
NPI 1427074707
6000 EXECUTIVE BLVD STE 620
Rockville, MD 20852
(240) 467-5888
✔ PECOS✔ Accepts MedicareSame address

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 Nelson Gustavo Neder Kalil, M.D.'s NPI number?

The NPI number for Nelson Gustavo Neder Kalil, M.D. is 1750569802. It was assigned to this organization in the NPPES registry on January 31, 2008.

Where is Nelson Gustavo Neder Kalil, M.D. located?

Nelson Gustavo Neder Kalil, M.D. is located at 6000 Executive Blvd Ste 620, Rockville, MD 20852. The listed phone number is (240) 467-5888.

What is Nelson Gustavo Neder Kalil, M.D.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Nelson Gustavo Neder Kalil, M.D. enrolled in Medicare?

Yes. Nelson Gustavo Neder Kalil, M.D. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Nelson Gustavo Neder Kalil, M.D.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Hematology/Oncology) reassigns their Medicare billing to Nelson Gustavo Neder Kalil, M.D.. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Nelson Gustavo Neder Kalil, M.D. was last updated on September 6, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.