Matthew Thomas Middendorf, MD
Internal Medicine Physician · Agana Heights, GU
Matthew Thomas Middendorf, MD is an internal medicine physician with a practice address in Agana Heights, Guam, and NPI 1629305784, issued on Nov 11, 2009. Check the license (Guam M-2396, as entered in NPPES) with the Guam board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Matthew Thomas Middendorf
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- M-2396 GU
MD-P-2025-007 GU
MD39270 SC
Self-reported in NPPES; status is on the state search - Practice location
- Farenholt Ave. Bldg. 50, Agana Heights, GU 96910
- Phone
- (671) 344-9340
- Enumerated
- Nov 11, 2009
- Record last updated
- Oct 1, 2025
- Medicare enrollment
- Enrolled (PECOS I20231020000660); accepts Medicare assignment
- Medical or professional school
- Mercer University School Of Medicine, 2013
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 24 in Guam → Look up another NPI →
Verify Matthew Thomas Middendorf in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Guam board licenses this profession
Search for license M-2396Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
23 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 88.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Guam Healthcare Development IncorporatedDededo, GU
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthew Thomas Middendorf among 24 internal medicine physician records in Guam
Matthew Thomas Middendorf, MD is one of 24 internal medicine physician records with a practice address in Guam. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 63% of them.
- NPI issued2009 · 63% of these records are older, 33% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2013 · median 1993 among the 16 with a school on file
- Record last updated2025 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Guam practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 internal medicine physician records list a practice address in Agana Heights
They are 7 of the 146 NPPES records with a practice address in Agana Heights, and 24 internal medicine physician records in Guam.
All 24 in Guam → Every provider in Agana Heights → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Makala Bascome, DOAgana Heights, GU 969101508487760
- Matthew Bauer, MDAgana Heights, GU 969101043730542
- Kimberly BoydAgana Heights, GU 969101447644851
- James Brunswick, MDAgana Heights, GU 969101588222442
- Danielle BuccineAgana Heights, GU 969101164960209
- Alexander Pazevic, DOAgana Heights, GU 969101386239101
- Alix Chenet, MDOka Tamuning, GU 969131669530507
- Pablo Guzman, M.D.Tamuning, GU 969131023081304
Common questions
What is Matthew Thomas Middendorf, MD's NPI number?
Matthew Thomas Middendorf, MD's National Provider Identifier (NPI) is 1629305784, issued on Nov 11, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Matthew Thomas Middendorf, MD located?
The NPPES record lists a practice address at Farenholt Ave. Bldg. 50, Agana Heights, GU, 96910. Phone: (671) 344-9340. Providers update this record themselves, so call before visiting.
How can I verify Matthew Thomas Middendorf, MD's license?
NPPES lists Guam license number M-2396, as entered by the provider. Search the Guam board that licenses this profession; the NPPES record confirms identity only.
How much does Matthew Thomas Middendorf, MD prescribe under Medicare Part D?
In 2024, Matthew Thomas Middendorf, MD had 23 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Matthew Thomas Middendorf, MD's MIPS final score?
The 2023 MIPS final score is 88.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.