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DR. BENJAMIN GARREN MD
NPI 1619336146
Pediatrics - Pediatric Critical Care Medicine in Bethesda, MD

Active since February 11, 2016PECOS Enrolled
8901 ROCKVILLE PIKE, BETHESDA, MD 20889(301) 295-4000 Get Directions Write a Review

NPPES record last updated: October 31, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 31, 2023, Mar 10, 2019, Feb 11, 2016 (3 updates tracked since 2016).

About Dr. Benjamin Garren Md NPPES

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

DR. BENJAMIN GARREN MD (NPI 1619336146) is an individual pediatric critical care medicine provider in Bethesda, Maryland, licensed in Massachusetts (279692) and active in the NPI registry since February 2016. He is enrolled in Medicare PECOS and is a graduate of Virginia Tech Carilion School Of Medicine (2016).

NPPES Registry Identity

NPI1619336146
Entity TypeIndividualMale
Primary Taxonomy2080P0203X
Provider Legal NameDR. BENJAMIN GARRENCredential: MD
Location Address8901 ROCKVILLE PIKEBethesda, MD 20889-5095
Mailing Address8901 Rockville PikeBethesda, MD 20889-5095 · (301) 295-4000
Phone(301) 295-4000
Sole ProprietorNo
Medical School CMSVirginia Tech Carilion School Of MedicineGraduated 2016
Enumeration DateFebruary 11, 2016
Last NPPES UpdateOctober 31, 20233 updates tracked since enumeration
NPPES CertifiedOctober 31, 2023
✔ NPI 1619336146 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric Critical Care MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080P0203X
License✔ Licensed in MA · 279692
Definition
A pediatrician expert in advanced life support for children from the term or near-term neonate to the adolescent. This competence extends to the critical care management of life-threatening organ system failure from any cause in both medical and surgical patients and to the support of vital physiological functions. This specialist may have administrative responsibilities for intensive care units and also facilitates patient care among other specialists.
Also ListedPediatricsTaxonomy 208000000X · License 279692 (MA)
8901 ROCKVILLE PIKE, Bethesda, MD 20889
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Benjamin Garren Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID345621082
PECOS Enrollment IDI20251030004378
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Benjamin Garren reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Medstar Medical Group II LLC
6.3 mi
Critical Care Medicine
3800 RESERVOIR RD NW
Washington, DC 20007
  • Reassigned Medicare billing, District of Columbia enrollment
  • 3,530 clinicians in this Medicare group
NPI 1205562816 (703) 558-1403

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. LIESL SHOCKLEY GRENIER M.D.
Dermatology (Dermatopathology)
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 295-4000
MEGAN JUDITH LENIHAN MD
Surgery (Vascular Surgery)
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 295-4000
JOHNS HOPKINS UNIVERSITY
Internal Medicine (Endocrinology, Diabetes & Metabolism)
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 400-1382
NATASHA ANTONY MD
Obstetrics & Gynecology
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 295-4600
MR. ANDREW JOSEPH ULLMANN JR. DO
Internal Medicine
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (908) 635-6978
BRYCE TANNER GARDNER DMD
Military Health Care Provider
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 295-4340
PARESH RAM PATEL MD
Emergency Medicine
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 295-4810
DR. BRADLEY ALLEN DENGLER M.D.
Neurological Surgery
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (610) 223-7261

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 Benjamin Garren's NPI number?

The NPI number for Benjamin Garren is 1619336146. It was assigned to this individual provider in the NPPES registry on February 11, 2016.

Where is Benjamin Garren located?

Benjamin Garren practices at 8901 Rockville Pike, Bethesda, MD 20889. The listed phone number is (301) 295-4000.

What is Benjamin Garren's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Critical Care Medicine, with taxonomy code 2080P0203X.

Is Benjamin Garren enrolled in Medicare?

Yes. Benjamin Garren is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Benjamin Garren's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Benjamin Garren reassigns Medicare benefits to Medstar Medical Group II LLC (Washington, DC). The 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 Benjamin Garren'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 Benjamin Garren was last updated on October 31, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.