DR. MEHRNAZ MOMENIAN MILLWATER M.D.
NPI 1902122476
Internal Medicine in Washington, DC
About Dr. Mehrnaz Momenian Millwater M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MEHRNAZ MOMENIAN MILLWATER M.D. (NPI 1902122476) is an individual internal medicine provider in Washington, District Of Columbia, licensed in District Of Columbia (MD041592) and active in the NPI registry since April 2010. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Mehrnaz Momenian Millwater M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Mehrnaz Millwater reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Washington, DC 20010
- Reassigned Medicare billing, District of Columbia enrollment
- 3,530 clinicians in this Medicare group
Washington, DC 20010
- Reassigned Medicare billing, District of Columbia enrollment
- Medicare enrollment name: Whc Physician Group LLC
- 613 clinicians in this Medicare group
Washington, DC 20007
- Reassigned Medicare billing, District of Columbia enrollment
- 861 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 20010 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.
WASHINGTON, DC 20010
WASHINGTON, DC 20010
WASHINGTON, DC 20010
WASHINGTON, DC 20010
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 Mehrnaz Millwater's NPI number?
The NPI number for Mehrnaz Millwater is 1902122476. It was assigned to this individual provider in the NPPES registry on April 8, 2010. The provider is also known as Dr. Mehrnaz Haji-Momenian M.D..
Where is Mehrnaz Millwater located?
Mehrnaz Millwater practices at 110 Irving St NW, Washington, DC 20010. The listed phone number is (202) 877-7227.
What is Mehrnaz Millwater's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Mehrnaz Millwater enrolled in Medicare?
Yes. Mehrnaz Millwater is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mehrnaz Millwater's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mehrnaz Millwater reassigns Medicare benefits to 3 organizations: Medstar Medical Group II LLC (Washington, DC), Whc Emerg Phys (Washington, DC) and Mgmc LLC (Washington, DC). Each 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 Mehrnaz Millwater'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 Mehrnaz Millwater was last updated on June 2, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Dr. Mehrnaz Momenian Millwater, M.D. · NPI 1902122476
Internal Medicine physician in Washington, District of Columbia. Individual provider, active in the CMS NPPES registry since April 8, 2010.
## Identity
- **NPI:** 1902122476 (Entity type: Individual)
- **Enumerated:** April 8, 2010
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** MD041592 (District of Columbia)
- **Sole proprietor:** No
## Practice location
- **Address:** 110 IRVING ST NW, Washington, DC 20010-3017
- **Phone:** (202) 877-7227
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Medstar Medical Group II LLC (NPI 1023836137, Washington, DC); Whc Emerg Phys (NPI 1306260625, Washington, DC); Mgmc LLC (NPI 1316949654, Washington, DC) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 2, 2016
---
Source: [NPI Profile](https://npiprofile.com/npi/1902122476) · Data from the CMS NPPES public registry.