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DR. KARL HSU M.D.
NPI 1053417485
Internal Medicine in Lexington, MA

Active since September 15, 2006
9 LOCKE LN, LEXINGTON, MA 02420(617) 680-4488 Get Directions Write a Review

NPPES record last updated: August 15, 2012. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Karl Hsu M.d. NPPES

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

DR. KARL HSU M.D. (NPI 1053417485) is an individual internal medicine provider in Lexington, Massachusetts, licensed in Pennsylvania (MD425621) and active in the NPI registry since September 2006.

NPPES Registry Identity

NPI1053417485
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. KARL HSUCredential: M.D.
Location Address9 LOCKE LNLexington, MA 02420-2706
Mailing Address9 Locke LnLexington, MA 02420-2706 · (617) 680-4488
Phone(617) 680-4488
Sole ProprietorNo
Enumeration DateSeptember 15, 2006
Last NPPES UpdateAugust 15, 2012
✔ NPI 1053417485 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in PA · MD425621
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedInternal Medicine · Geriatric MedicineTaxonomy 207RG0300X · License MD425621 (PA)
Also ListedInternal Medicine · Hematology & OncologyTaxonomy 207RH0003X · License MD425621 (PA)
9 LOCKE LN, Lexington, MA 02420
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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 Karl Hsu's NPI number?

The NPI number for Karl Hsu is 1053417485. It was assigned to this individual provider in the NPPES registry on September 15, 2006.

Where is Karl Hsu located?

Karl Hsu practices at 9 Locke Ln, Lexington, MA 02420. The listed phone number is (617) 680-4488.

What is Karl Hsu's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Karl Hsu was last updated on August 15, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years 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.