MARY MARGARET MACHACA RD, LD
NPI 1780476820
Dietitian, Registered in Derwood, MD
About Mary Margaret Machaca Rd, Ld NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY MARGARET MACHACA RD, LD (NPI 1780476820) is an individual dietitian, registered in Derwood, Maryland, licensed in Maryland (DX7275) and active in the NPI registry since May 2025. She is a graduate of Other (2017).
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 and accepts Medicare assignment
Mary Margaret Machaca Rd, Ld 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 Mary Machaca reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Rockville, MD 20850
- Reassigned Medicare billing, District of Columbia enrollment
- 41 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 20855 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Mary Machaca's NPI number?
The NPI number for Mary Machaca is 1780476820. It was assigned to this individual provider in the NPPES registry on May 22, 2025. The provider is also known as Mary Dawson Rd, Ld.
Where is Mary Machaca located?
Mary Machaca practices at 7361 Calhoun Pl Ste 600, Derwood, MD 20855. The listed phone number is (301) 942-7600.
What is Mary Machaca's specialty?
The primary specialty registered for this NPI is Dietitian, Registered with taxonomy code 133V00000X.
Is Mary Machaca enrolled in Medicare?
Yes. Mary Machaca 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 Mary Machaca's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Machaca reassigns Medicare benefits to Arthritis And Rheumatism Associates PC (Rockville, MD). 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 Mary Machaca'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 Mary Machaca was last updated on May 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Mary Margaret Machaca, RD, LD · NPI 1780476820
Dietitian, Registered provider in Derwood, Maryland. Individual provider, active in the CMS NPPES registry since May 22, 2025.
## Identity
- **NPI:** 1780476820 (Entity type: Individual)
- **Enumerated:** May 22, 2025
- **Primary specialty:** Dietitian, Registered · taxonomy 133V00000X
- **State license:** DX7275 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 7361 CALHOUN PL STE 600, Derwood, MD 20855-2788
- **Phone:** (301) 942-7600
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** Arthritis And Rheumatism Associates PC (NPI 1447259866, Rockville, MD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** May 22, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1780476820) · Data from the CMS NPPES public registry.