ABNER LOUISSAINT, JR. MD, PHD – NPI #1124154950
Pathology

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.

Health Care Provider Taxonomy Code for Pathology

ABNER LOUISSAINT, JR. is a pathologist located in BOSTON, MA. NPPES has assigned the NPI number 1124154950 to ABNER LOUISSAINT, JR. on February 26, 2007. It is a Type-1 NPI, indicating this NPI number is associated with an individual. The primary taxonomy selected by this provider is 207ZP0102X from the Health Care Provider Taxonomy code set, which is classified as Pathology, specializing in Anatomic Pathology & Clinical Pathology

The NPI profile was last updated on May 15, 2026. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for ABNER LOUISSAINT, JR. below.

NPI Profile for
ABNER LOUISSAINT, JR.

NPI Number
1124154950
Enumeration Date

(more than 19 years ago)
Entity Type
Type-1  Individual (Male)
Legal Name
ABNER LOUISSAINT, JR.
Credentials
MD, PHD
Primary location
MASSACHUSETTS GENERAL HOSPITAL
55 FRUIT STREET
BOSTON, MA 02114
Phone: (617) 726-2967 Fax:
1 Other location(s):
75 Francis St
Boston, MA 02115-6110
Phone: (617) 732-5500
Mailing address
Same as primary location
Sole Proprietor
No
Updated
Certification Date
May 15, 2026

Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.

Taxonomy Code(s)

A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.

Taxonomy Classification / Specialization State License
207ZP0102X
- Pathology / Anatomic Pathology & Clinical Pathology (Primary)		 MA L-225010

The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.

Additional Information

Accepts Medicare
This provider accepts Medicare-approved amount as payment in full. The Medicare-approved amount is the total the provider can be paid. When a provider accepts the Medicare-approved amount as payment, you won't be billed for more than the Medicare deductible & coinsureance.
Medicare Ordering & Referring
Provider can:
  • Refer to Part B
  • Order Durable Medical Equipment
  • Refer to Home Health Agency
  • Order Power Mobility Devices
Affiliations
ABNER LOUISSAINT, JR. is affiliated with the following medical group(s):
  • HOSPITAL
    • BRIGHAM AND WOMEN'S HOSPITAL
      75 FRANCIS STREET
      BOSTON, MA 02115
    • MASSACHUSETTS EYE AND EAR INFIRMARY -
      243 CHARLES STREET
      BOSTON, MA 02114
    • MASSACHUSETTS GENERAL HOSPITAL
      55 FRUIT STREET
      BOSTON, MA 02114

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