MATTHEW THOMAS MIDDENDORF MD
NPI 1629305784
Internal Medicine - Pulmonary Disease in Portsmouth, VA
About Matthew Thomas Middendorf Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MATTHEW THOMAS MIDDENDORF MD (NPI 1629305784) is an individual pulmonary disease provider in Portsmouth, Virginia, licensed in South Carolina (MD39270) and active in the NPI registry since November 2009. He is enrolled in Medicare PECOS, is affiliated with Guam Regional Medical City, and is a graduate of Mercer University School Of Medicine (2013).
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Matthew Thomas Middendorf Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Matthew Middendorf reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Dededo, GU 96929
- Reassigned Medicare billing, Guam enrollment
- 432 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Guam Regional Medical City
Acute Care Hospitals · Dededo, GUPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 23708 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PORTSMOUTH, VA 23708
PORTSMOUTH, VA 23708
PORTSMOUTH, VA 23708
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Matthew Middendorf's NPI number?
The NPI number for Matthew Middendorf is 1629305784. It was assigned to this individual provider in the NPPES registry on November 11, 2009.
Where is Matthew Middendorf located?
Matthew Middendorf practices at 620 John Paul Jones Cir, Portsmouth, VA 23708. The listed phone number is (706) 296-3552.
What is Matthew Middendorf's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.
Is Matthew Middendorf enrolled in Medicare?
Yes. Matthew Middendorf is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Matthew Middendorf's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Matthew Middendorf reassigns Medicare benefits to Guam Healthcare Development Incorporated (Dededo, GU). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Matthew Middendorf's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Matthew Middendorf affiliated with any hospitals?
According to CMS data, Matthew Middendorf is affiliated with Guam Regional Medical City.
When was this NPI record last updated?
The NPPES record for Matthew Middendorf was last updated on October 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Matthew Thomas Middendorf, MD · NPI 1629305784
Pulmonary Disease physician in Portsmouth, Virginia. Individual provider, active in the CMS NPPES registry since November 11, 2009.
## Identity
- **NPI:** 1629305784 (Entity type: Individual)
- **Enumerated:** November 11, 2009
- **Primary specialty:** Internal Medicine - Pulmonary Disease · taxonomy 207RP1001X
- **State license:** MD39270 (South Carolina)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 620 JOHN PAUL JONES CIR, Portsmouth, VA 23708-2111
- **Phone:** (706) 296-3552
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Guam Healthcare Development Incorporated (NPI 1326447939, Dededo, GU), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Mercer University School Of Medicine, class of 2013
## Record status
- **NPPES last updated:** October 19, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1629305784) · Data from the CMS NPPES public registry.