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

STEPHEN C BLACKLOW M.D.
NPI 1982662805
Pathology - Clinical Pathology/Laboratory Medicine in Boston, MA

Q: What is Stephen Blacklow's NPI number?

The NPI number for Stephen Blacklow is 1982662805. It was assigned to this individual provider in the NPPES registry on May 2, 2006.

Q: What is Stephen Blacklow's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Clinical Pathology/Laboratory Medicine, with taxonomy code 207ZP0105X.

Q: When was this NPI record last updated?

The NPPES record for Stephen Blacklow 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 39 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.

Active since May 02, 2006

77 AVENUE LOUIS PASTEUR, BOSTON, MA 02115(617) 525-4415 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Stephen C Blacklow M.d. NPPES

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

STEPHEN C BLACKLOW M.D. (NPI 1982662805) is an individual clinical pathology/laboratory medicine provider in Boston, Massachusetts, licensed in Massachusetts (81307) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1982662805

Entity TypeIndividualMale

Primary Taxonomy207ZP0105X

Provider Legal NameSTEPHEN C BLACKLOWCredential: M.D.

Location Address77 AVENUE LOUIS PASTEURBoston, MA 02115-5727

Mailing Address16 Ash StCambridge, MA 02138-4832 · (617) 525-4415

Phone(617) 525-4415

Sole ProprietorNo

Enumeration DateMay 2, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1982662805 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Clinical Pathology/Laboratory MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207ZP0105X

License✔ Licensed in MA · 81307

Definition

A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

77 AVENUE LOUIS PASTEUR, Boston, MA 02115

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Other Providers at the Same Location NPPES 11

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

DANIEL R BROWN M.D.

Pediatrics (Pediatric Rheumatology)

77 AVENUE LOUIS PASTEUR, NRB-837
BOSTON, MA 02115

Suffolk County (617) 432-6570

DR. DAVE STANLEY MILSTONE M.D.

Pathology (Anatomic Pathology)

77 AVENUE LOUIS PASTEUR, HNRB 730G
BOSTON, MA 02115

Suffolk County (617) 525-4308

DR. DENNIS J SELKOE MD

Psychiatry & Neurology (Neurology)

77 AVENUE LOUIS PASTEUR, HIM 730
BOSTON, MA 02115

Suffolk County (617) 525-5200

MONICA A GIOVANNI M.S.

Chronic Disease Hospital

77 AVENUE LOUIS PASTEUR, NRB 455
BOSTON, MA 02115

Suffolk County (617) 525-4546

DR. BENJAMIN GILBERT NEEL M.D., PH.D.

Internal Medicine

77 AVENUE LOUIS PASTEUR, NRB ROOM 1030
BOSTON, MA 02115

Suffolk County (617) 667-2823

DR. NATASHA YURI FRANK MD

Internal Medicine

77 AVENUE LOUIS PASTEUR, NRB 455
BOSTON, MA 02115

Suffolk County (617) 525-4746

RAJA-ELIE EDWARD ABDULNOUR MD

Internal Medicine (Pulmonary Disease)

77 AVENUE LOUIS PASTEUR, HIM 807
BOSTON, MA 02115

Suffolk County (617) 525-5404

P REED LARSEN MD

Internal Medicine (Endocrinology, Diabetes & Metabolism)

77 AVENUE LOUIS PASTEUR, HARVARD INSTITUTES OF MEDICINE
BOSTON, MA 02115

Suffolk County (617) 525-5150

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 Stephen Blacklow's NPI number?

The NPI number for Stephen Blacklow is 1982662805. It was assigned to this individual provider in the NPPES registry on May 2, 2006.

Where is Stephen Blacklow located?

Stephen Blacklow practices at 77 Avenue Louis Pasteur, Boston, MA 02115. The listed phone number is (617) 525-4415.

What is Stephen Blacklow's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Clinical Pathology/Laboratory Medicine, with taxonomy code 207ZP0105X.

When was this NPI record last updated?

The NPPES record for Stephen Blacklow 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 39 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.