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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

MR. ALAN L SIEBER PHD
NPI 1043252265
Psychologist - Clinical in Lowell, MA

Active since June 12, 2006
99 CHURCH ST, LOWELL, MA 01852(978) 458-6282(978) 441-9826 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Mr. Alan L Sieber Phd NPPES

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

MR. ALAN L SIEBER PHD (NPI 1043252265) is an individual clinical provider in Lowell, Massachusetts, licensed in Massachusetts (2941) and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1043252265
Entity TypeIndividualMale
Primary Taxonomy103TC0700X
Provider Legal NameMR. ALAN L SIEBERCredential: PHD
Location Address99 CHURCH STLowell, MA 01852-2621
Mailing Address37 Pickman DrBedford, MA 01730-1009 · (781) 276-1808
Phone(978) 458-6282
Fax(978) 441-9826
Sole ProprietorNo
Enumeration DateJune 12, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1043252265 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License✔ Licensed in MA · 2941
Definition
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.
99 CHURCH ST, Lowell, MA 01852
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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.

MR. GERARD F EYSSALLENNE
Counselor (Mental Health)
99 CHURCH ST
LOWELL, MA 01852
Middlesex County (978) 458-6282
MS. LORIANNE BONSIGNORE
Social Worker
99 CHURCH ST
LOWELL, MA 01852
Middlesex County (978) 458-6282
MR. ANDREW J SHLESINGER
Counselor (Mental Health)
99 CHURCH ST
LOWELL, MA 01852
Middlesex County (978) 458-6282
MRS. ANN M SAPIRA LICSW
Social Worker (Clinical)
99 CHURCH ST
LOWELL, MA 01852
Middlesex County (978) 458-6282
MS. ROBYN DEANGELIS M.ED
Counselor (Mental Health)
99 CHURCH ST
LOWELL, MA 01852
Middlesex County (978) 458-6282
MRS. LISA A OLINGER
Counselor (Mental Health)
99 CHURCH ST
LOWELL, MA 01852
Middlesex County (978) 458-6282
CAROLINE KEANEY LCSW
Social Worker (Clinical)
99 CHURCH ST
LOWELL, MA 01852
Middlesex County (978) 458-6282
CHUCK SART
Social Worker
99 CHURCH ST
LOWELL, MA 01852
Middlesex County (978) 458-6282

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 Alan Sieber's NPI number?

The NPI number for Alan Sieber is 1043252265. It was assigned to this individual provider in the NPPES registry on June 12, 2006.

Where is Alan Sieber located?

Alan Sieber practices at 99 Church St, Lowell, MA 01852. The listed phone number is (978) 458-6282.

What is Alan Sieber's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

When was this NPI record last updated?

The NPPES record for Alan Sieber was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.