Individual provider · Type 1 NPI

Daniel M. Horn, MD

Internal Medicine Physician · Waltham, MA

NPI number 1780903971 Active

Practice location

221 Crescent St Ste 202
Waltham, MA 02453-3425

Call (866) 849-0692 Map

Mailing address

PO Box 211699
Eagan, MN 55121-3699

Other practice locations

  • 15 Parkman Street, Wac 612, Boston, MA 02114-3117 · (617) 726-2374
  • 1055 Howell Mill Rd NW Fl 8, Atlanta, GA 30318-5557 · (866) 849-0692

Specialties and licenses

TaxonomyCodeLicense
Internal Medicine Physician 207R00000XMD484408 (PA)
Internal Medicine Physician 207R00000X100333 (GA)
Internal Medicine Physician 207R00000XU8885 (TX)
Internal Medicine Physician 207R00000XDR.0072398 (CO)
Internal Medicine Physician 207R00000X91509 (SC)
Internal Medicine Physician 207R00000X036.168528 (IL)
Internal Medicine Physician 207R00000XMD.48112 (AL)
Internal Medicine Physician 207R00000XMD24268 (HI)
Internal Medicine Physician 207R00000X35C.001303 (OH)
Internal Medicine Physician 207R00000X72732 (AZ)
Internal Medicine Physician Primary 207R00000X251716 (MA)
Internal Medicine Physician 207R00000X2024-01822 (NC)
Internal Medicine Physician 207R00000XME166617 (FL)
Internal Medicine Physician 207R00000X70584 (TN)
Internal Medicine Physician 207R00000XMD218918 (OR)

Internal Medicine Physician: 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 medi…

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About NPI 1780903971

Daniel M. Horn, MD's National Provider Identifier is 1780903971, issued on May 27, 2010. The primary taxonomy on file is Internal Medicine Physician (207R00000X), and the practice location is in Waltham, MA. The record was last updated on Jun 11, 2026.