Matthew Middendorf, MD
NPI 1629305784 · Internal Medicine Physician · Agana Heights, GU
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Middendorf, MD is a Internal Medicine Physician provider in Agana Heights, GU (NPI 1629305784).
Provider details
- NPI number
- 1629305784
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD39270 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
75 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 39 | $92 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 24 | $78 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 12 | $129 |
Typical Medicare-allowed amounts for these services range $78–$129 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 320 E 50th StSavannah, GA 31405-2238Phone: (706) 296-3552
Registry dates
- Enumerated
- 2009-11-11
- Last updated
- 2025-10-01
- Certified
- 2025-10-01
Frequently asked questions
- What is Matthew Middendorf's NPI number?
- Matthew Middendorf's National Provider Identifier (NPI) is 1629305784, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Middendorf's specialty?
- Matthew Middendorf is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Middendorf located?
- Matthew Middendorf's practice location on file with NPPES is Farenholt Ave. Bldg. 50, Agana Heights, GU 96910.
- What is Matthew Middendorf's phone number?
- The practice phone number listed in the NPPES registry for Matthew Middendorf is (671) 344-9340.
- Does Matthew Middendorf accept Medicare?
- Matthew Middendorf is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Middendorf's NPI active?
- Yes — Matthew Middendorf's NPI (1629305784) is active in the NPPES registry as of the last update on 2025-10-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.