Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David N Louis, MD

Q: What is the NPI number for David Louis?

The National Provider Identifier (NPI) for David Louis is 1326038753, a Type 1 (individual) record in the CMS NPPES registry.

Anatomic Pathology Physician in Boston, MA · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1326038753

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name David N Louis

Credential MD

Sex Male

Practice address 55 Fruit St, Wrn 2, Boston, MA, 02114

Phone (617) 726-2966

Fax (617) 726-7533

Enumeration date Oct 26, 2005

Last updated in NPPES Apr 23, 2018

Taxonomy & licenses

207ZN0500X Neuropathology Physician Allopathic & Osteopathic Physicians · License 57278 (MA) Secondary

207ZP0101X Anatomic Pathology Physician Allopathic & Osteopathic Physicians · License 57278 (MA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
J12149	Other	MA	BCBS MA
3089649	Medicaid	MA	-
057278	Other	MA	TUFTS HEALTH PLAN

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does David Louis practice?

The practice location on file with NPPES is in Boston, MA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for David Louis?

The National Provider Identifier (NPI) for David Louis is 1326038753, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Andrew Chan Gastroenterology Physician · Boston, MA NPI 1982600144 Kaloyan Tanev Psychiatry Physician · Boston, MA NPI 1538166889 Debra Weinstein Gastroenterology Physician · Boston, MA NPI 1124028238 Russel Roberts Critical Care Pharmacist · Boston, MA NPI 1861494312 Miriam Neuman Diagnostic Radiology Physician · Boston, MA NPI 1689668675 Robert Mckenna Surgical Physician Assistant · Boston, MA NPI 1912992876 Nancy Gagliano Internal Medicine Physician · Boston, MA NPI 1881680767 David Torchiana Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Boston, MA NPI 1285620161

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-04-23.