JOSEPH MULLER M.D.
NPI 1033505342
Internal Medicine in Washington, DC
About Joseph Muller M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOSEPH MULLER M.D. (NPI 1033505342) is an individual internal medicine provider in Washington, District Of Columbia, licensed in District Of Columbia (MD048514) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, maintains a secondary practice location in Baltimore, and is a graduate of Other (2015).
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
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
Joseph Muller M.d. 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 Joseph Muller reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Washington, DC 20009
- Reassigned Medicare billing, District of Columbia enrollment
- 343 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20019 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
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 Joseph Muller's NPI number?
The NPI number for Joseph Muller is 1033505342. It was assigned to this individual provider in the NPPES registry on April 13, 2015.
Where is Joseph Muller located?
Joseph Muller practices at 4414 Benning Rd NE, Washington, DC 20019. The listed phone number is (202) 469-4699.
What is Joseph Muller's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Joseph Muller enrolled in Medicare?
Yes. Joseph Muller 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 Joseph Muller's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Joseph Muller reassigns Medicare benefits to Unity Health Care, Inc. (Washington, DC). 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 Joseph Muller's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Joseph Muller was last updated on July 13, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.
# Joseph Muller, M.D. · NPI 1033505342
Internal Medicine physician in Washington, District of Columbia. Individual provider, active in the CMS NPPES registry since April 13, 2015.
## Identity
- **NPI:** 1033505342 (Entity type: Individual)
- **Enumerated:** April 13, 2015
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** MD048514 (District of Columbia)
- **Sole proprietor:** No
## Practice location
- **Address:** 4414 BENNING RD NE, Washington, DC 20019-4555
- **Phone:** (202) 469-4699
## 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:** Unity Health Care, Inc. (NPI 1093894172, Washington, DC), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** July 13, 2020
---
Source: [NPI Profile](https://npiprofile.com/npi/1033505342) · Data from the CMS NPPES public registry.