DR. GRACE DEMARCO MD
NPI 1801424700
Internal Medicine - Infectious Disease in Washington, DC
About Dr. Grace Demarco Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GRACE DEMARCO MD (NPI 1801424700) is an individual infectious disease provider in Washington, District Of Columbia, licensed in District Of Columbia (MD500003368) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS and is a graduate of University Of South Carolina School Of Medicine (2020).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Grace Demarco 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 Grace Demarco reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Washington, DC 20007
- Reassigned Medicare billing, District of Columbia enrollment
- 3,530 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 20007 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.
WASHINGTON, DC 20007
WASHINGTON, DC 20007
WASHINGTON, DC 20007
WASHINGTON, DC 20007
WASHINGTON, DC 20007
WASHINGTON, DC 20007
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 Grace Demarco's NPI number?
The NPI number for Grace Demarco is 1801424700. It was assigned to this individual provider in the NPPES registry on March 28, 2020.
Where is Grace Demarco located?
Grace Demarco practices at 3800 Reservoir Rd NW, Washington, DC 20007. The listed phone number is (202) 444-8168.
What is Grace Demarco's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Grace Demarco enrolled in Medicare?
Yes. Grace Demarco 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 Grace Demarco's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Grace Demarco reassigns Medicare benefits to Medstar Medical Group II LLC (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 Grace Demarco'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 Grace Demarco was last updated on June 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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. Grace Demarco, MD · NPI 1801424700
Infectious Disease physician in Washington, District of Columbia. Individual provider, active in the CMS NPPES registry since March 28, 2020.
## Identity
- **NPI:** 1801424700 (Entity type: Individual)
- **Enumerated:** March 28, 2020
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** MD500003368 (District of Columbia)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 3800 RESERVOIR RD NW, Washington, DC 20007-2113
- **Phone:** (202) 444-8168 · **Fax:** (877) 303-1460
## 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:** Medstar Medical Group II LLC (NPI 1205562816, Washington, DC), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of South Carolina School Of Medicine, class of 2020
## Record status
- **NPPES last updated:** June 1, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1801424700) · Data from the CMS NPPES public registry.