Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Matthew Thomas Middendorf, MD

Individual provider Internal Medicine Physician · NPI 1629305784

Matthew Thomas Middendorf, MD is a Pulmonary Disease in Agana Heights, Guam. Graduated from Mercer University School of Medicine in 2013, 13 years ago. Practices with Guam Healthcare Development Incorporated, a 209-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Guam and South Carolina.

Years since qualifying
13
Trained at
Mercer University School of Medicine
Licensed in
GU, SC
In the registry since
2009
Specialties on file
7
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address may be wrong

The ZIP code does not match the city and state on this record. Call before visiting.

Farenholt Ave Bldg 50
Agana Heights, GU 96910
Phone: (671) 344-9340

Additional practice locations (1)

  • 320 E 50th St, Savannah, GA 31405-2238 — (706) 296-3552

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD39270 (SC)
Pulmonary Disease Physician Taxonomy 207RP1001X · Licence M-2396 (GU)
Pulmonary Disease Physician Taxonomy 207RP1001X · Licence MD-P-2025-007 (GU)
Pulmonary Disease Physician Taxonomy 207RP1001X · Licence MD39270 (SC)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence M-2396 (GU)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence MD-P-2025-007 (GU)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence MD39270 (SC)

Record details

NPI number1629305784
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 11, 2009
Last updated in NPPESOctober 1, 2025
Certification dateOctober 1, 2025
Mailing addressPsc 455 Box 208, Fpo, AP 96540-0003

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPULMONARY DISEASE
Also practisesCRITICAL CARE (INTENSIVISTS)
Medical schoolMERCER UNIVERSITY SCHOOL OF MEDICINE
Graduated 2013 (13 years in practice)
Group practice Guam Healthcare Development Incorporated — 209 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Agana Heights