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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. STEVEN A.R. CASTILLO MD
NPI 1336933894
General Practice in Bethesda, MD

Active since April 08, 2025
8901 ROCKVILLE PIKE, BETHESDA, MD 20889(301) 295-8901(301) 319-8240 Get Directions Write a Review

NPPES record last updated: August 15, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Aug 15, 2026, Jun 18, 2025, Apr 8, 2025 (3 updates tracked since 2025).

About Dr. Steven A.r. Castillo Md NPPES

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

DR. STEVEN A.R. CASTILLO MD (NPI 1336933894) is an individual general practice provider in Bethesda, Maryland, licensed in Virginia (0101290655) and active in the NPI registry since April 2025.

NPPES Registry Identity

NPI1336933894
Entity TypeIndividualMale
Primary Taxonomy208D00000X
Provider Legal NameDR. STEVEN A.R. CASTILLOCredential: MD
Location Address8901 ROCKVILLE PIKEBethesda, MD 20889-0001
Mailing Address8901 Rockville PikeBethesda, MD 20889-0001 · (301) 295-8901 · Fax (301) 319-8240
Phone(301) 295-8901
Fax(301) 319-8240
Sole ProprietorNo
Enumeration DateApril 8, 2025
Last NPPES UpdateAugust 15, 20263 updates tracked since enumeration
NPPES CertifiedAugust 15, 2026
✔ NPI 1336933894 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians
Taxonomy Code208D00000X
License✔ Licensed in VA · 0101290655
Definition
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
8901 ROCKVILLE PIKE, Bethesda, MD 20889
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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
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
MATTHEW NICHOLAS RIBEIRO MD
Anesthesiology
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 295-4000
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

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 Steven Castillo's NPI number?

The NPI number for Steven Castillo is 1336933894. It was assigned to this individual provider in the NPPES registry on April 8, 2025.

Where is Steven Castillo located?

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

What is Steven Castillo's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

When was this NPI record last updated?

The NPPES record for Steven Castillo was last updated on August 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 days 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.