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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 30 days.

AGNIESZKA (AGNES) SIARKOWSKA
NPI 1740103639
Counselor - Professional in Gaithersburg, MD

Active since July 30, 2026
16220 FREDERICK RD STE 310, GAITHERSBURG, MD 20877(301) 345-1022(301) 560-5558 Get Directions Write a Review

NPPES record added: July 30, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Agnieszka (agnes) Siarkowska NPPES

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

AGNIESZKA (AGNES) SIARKOWSKA (NPI 1740103639) is an individual professional provider in Gaithersburg, Maryland, licensed in Maryland (18112) and active in the NPI registry since July 2026.

NPPES Registry Identity

NPI1740103639
Entity TypeIndividualFemale
Primary Taxonomy101YP2500X
Provider Legal NameAGNIESZKA (AGNES) SIARKOWSKA
Location Address16220 FREDERICK RD STE 310Gaithersburg, MD 20877-4020
Mailing Address16220 Frederick Rd Ste 310Gaithersburg, MD 20877-4020 · (301) 345-1022 · Fax (301) 560-5558
Phone(301) 345-1022
Fax(301) 560-5558
Sole ProprietorNo
Enumeration DateJuly 30, 2026
NPPES CertifiedJuly 30, 2026
✔ NPI 1740103639 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · ProfessionalBehavioral Health & Social Service Providers
Taxonomy Code101YP2500X
License✔ Licensed in MD · 18112
16220 FREDERICK RD STE 310, Gaithersburg, MD 20877
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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.

HALEY A LAWRENCE MSW
Social Worker
16220 FREDERICK RD STE 310
GAITHERSBURG, MD 20877
Montgomery County (301) 345-1022
SHAHLA GARRISON ABDI LMSW
Social Worker
16220 FREDERICK RD STE 310
GAITHERSBURG, MD 20877
Montgomery County (301) 358-4388
ADVANCED BEHAVIORAL HEALTH, INC
Psychiatry & Neurology (Child & Adolescent Psychiatry)
16220 FREDERICK RD STE 310
GAITHERSBURG, MD 20877
Montgomery County (301) 461-9686
TRACY UCUZOGLU
Social Worker
16220 FREDERICK RD STE 310
GAITHERSBURG, MD 20877
Montgomery County (301) 358-4388
TERESA MARTUCCI LCSW-C
Social Worker (Clinical)
16220 FREDERICK RD STE 310
GAITHERSBURG, MD 20877
Montgomery County (301) 345-1022
ADVANCED BEHAVIORAL HEALTH, INC
Case Management
16220 FREDERICK RD STE 310
GAITHERSBURG, MD 20877
Montgomery County (301) 345-1022
MEAGAN LYNN SCHMIDT
Counselor (Professional)
16220 FREDERICK RD STE 310
GAITHERSBURG, MD 20877
Montgomery County (301) 358-4388
KAILA SWANN LMSW
Social Worker
16220 FREDERICK RD STE 310
GAITHERSBURG, MD 20877
Montgomery County (301) 345-1022

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 Agnieszka (agnes) Siarkowska's NPI number?

The NPI number for Agnieszka (agnes) Siarkowska is 1740103639. It was assigned to this individual provider in the NPPES registry on July 30, 2026.

Where is Agnieszka (agnes) Siarkowska located?

Agnieszka (agnes) Siarkowska practices at 16220 Frederick Rd Ste 310, Gaithersburg, MD 20877. The listed phone number is (301) 345-1022.

What is Agnieszka (agnes) Siarkowska's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Professional, with taxonomy code 101YP2500X.

When was this NPI record last updated?

The NPPES record for Agnieszka (agnes) Siarkowska was last updated on July 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.