National Provider Identifier Database

MATTHEW T MIDDENDORF, MD – NPI #1629305784
Internal Medicine

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.


Contact Information

MATTHEW T MIDDENDORF, MD
FARENHOLT AVE. BLDG. 50
AGANA HEIGHTS, GU96910
Phone: 671-344-9340
Fax:
Website:
Specialty Taxonomy Code
* Internal Medicine 207R00000X
Critical Care Medicine 207RC0200X
Pulmonary Disease 207RP1001X

* Indicates primary specialty

NPI Profile & details for MATTHEW T MIDDENDORF

NPI Number 1629305784
Credentials MD
Entity Individual
Enumeration date 11/11/2009
Last updated 10/01/2025 - About 8 months ago
Sole proprietor1 Yes
Identifiers
  • GU License #: M-2396
  • GU License #: MD-P-2025-007
  • SC License #: MD39270
Hospital affiliation n/a

1 A sole proprietor/sole proprietorship is an individual, and as such, is eligible for a single NPI number. The sole proprietor must apply for the NPI number using his or her own Social Security Number (SSN), not an Employer Identification Number (EIN) even if he/she has an EIN.

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