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

JOEL HAMMER M.D.
NPI 1053371179
Pathology - Anatomic Pathology & Clinical Pathology in Baltimore, MD

Q: What is Joel Hammer's NPI number?

The NPI number for Joel Hammer is 1053371179. It was assigned to this individual provider in the NPPES registry on March 24, 2006.

Q: What is Joel Hammer's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Q: When was this NPI record last updated?

The NPPES record for Joel Hammer 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 30 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 March 24, 2006

9000 FRANKLIN SQUARE DR, BALTIMORE, MD 21237(443) 777-7000 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Joel Hammer M.d. NPPES

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

JOEL HAMMER M.D. (NPI 1053371179) is an individual anatomic pathology & clinical pathology provider in Baltimore, Maryland, licensed in Maryland (D0031878) and active in the NPI registry since March 2006.

NPPES Registry Identity

NPI1053371179

Entity TypeIndividualMale

Primary Taxonomy207ZP0102X

Provider Legal NameJOEL HAMMERCredential: M.D.

Location Address9000 FRANKLIN SQUARE DRBaltimore, MD 21237-3901

Mailing Address9000 Franklin Square DrBaltimore, MD 21237-3901 · (443) 777-7000

Phone(443) 777-7000

Sole ProprietorNo

Enumeration DateMarch 24, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1053371179 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians

Taxonomy Code207ZP0102X

License✔ Licensed in MD · D0031878

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.

9000 FRANKLIN SQUARE DR, Baltimore, MD 21237

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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.

FRANKLIN SQUARE HOSPITAL CENTER, INC

Clinical Medical Laboratory

9000 FRANKLIN SQUARE DR
BALTIMORE, MD 21237

Baltimore County (443) 777-7257

DIH-YIN CHEN MD

Student in an Organized Health Care Education/Training Program

9000 FRANKLIN SQUARE DR
BALTIMORE, MD 21237

Baltimore County (443) 777-8300

PERCY IVAN VALENZUELA CANEPA M.D.

Internal Medicine

9000 FRANKLIN SQUARE DR, HOSPITALIST PROGRAM
BALTIMORE, MD 21237

Baltimore County (443) 777-8186

MISS BROOKE JELA REDMER PA-C

Physician Assistant

9000 FRANKLIN SQUARE DR
BALTIMORE, MD 21237

Baltimore County (443) 777-7900

ERIC WUNDERLE

Physical Therapist

9000 FRANKLIN SQUARE DR
BALTIMORE, MD 21237

Baltimore County (443) 777-7000

MARK DEAN WAGUESPACK MD

Anesthesiology

9000 FRANKLIN SQUARE DR
BALTIMORE, MD 21237

Baltimore County (443) 777-7179

ROBERT A PAZ M.D.

Internal Medicine

9000 FRANKLIN SQUARE DR
BALTIMORE, MD 21237

Baltimore County (443) 777-7000

FRANKLIN SQUARE HOSPITAL CENTER INC

Pediatrics

9000 FRANKLIN SQUARE DR
BALTIMORE, MD 21237

Baltimore County (443) 777-7000

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 Joel Hammer's NPI number?

The NPI number for Joel Hammer is 1053371179. It was assigned to this individual provider in the NPPES registry on March 24, 2006.

Where is Joel Hammer located?

Joel Hammer practices at 9000 Franklin Square Dr, Baltimore, MD 21237. The listed phone number is (443) 777-7000.

What is Joel Hammer's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

When was this NPI record last updated?

The NPPES record for Joel Hammer 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 30 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.