Active NPI
Mary Margaret Machaca, RD, LD
- Registered Dietitian
- Derwood, MD
National Provider Identifier
1780476820
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Registered Dietitian
- License
- DX7275
- Practice address
- 7361 Calhoun PL Ste 600
Derwood, MD 20855-2788 - Phone
- (301) 942-7600
- NPI assigned
- May 22, 2025
- Last updated
- May 22, 2025
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Registered Dietitian | 133V00000X | DX7275 | MD | Primary |
Addresses
Primary practice location
7361 Calhoun PL Ste 600
Derwood, MD 20855-2788
Mailing address
7361 Calhoun PL Ste 600
Derwood, MD 20855-2788
Other names 1
- Mary Dawson
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in DC
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Registered Dietitian Or Nutrition Professional
- Education
- Other, 2017
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Telehealth
- Offers telehealth services
- Group practices
Practice addresses (Care Compare)
7361 Calhoun PL
Suite 600
Rockville, MD 20855-2788
Phone 301942044211203
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| DX7275 | MD | MD | Registered Dietitian |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Arthritis and Rheumatism Associates PC | Current | Accepting new patients |
Locations
7361 Calhoun Pl
Ste 600
Rockville, MD 20855
2730 University Blvd W
Ste 310
Wheaton, MD 20902
Interoperability endpoints
- https://fhir.nextgen.com/nge/prod/fhir-api-r4/fhir/r4/
- mary.machaca.d1.p1@direct.aramd.nextgenshare.com
Organizations & group practices 1
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1747872000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1747872000000",
"number": "1780476820",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "7361 CALHOUN PL STE 600",
"city": "DERWOOD",
"state": "MD",
"postal_code": "208552788"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "7361 CALHOUN PL STE 600",
"city": "DERWOOD",
"state": "MD",
"postal_code": "208552788",
"telephone_number": "301-942-7600"
}
],
"practiceLocations": [],
"basic": {
"last_name": "MACHACA",
"first_name": "MARY",
"middle_name": "MARGARET",
"credential": "RD, LD",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2025-05-22",
"last_updated": "2025-05-22",
"certification_date": "2025-05-22",
"status": "A"
},
"taxonomies": [
{
"code": "133V00000X",
"taxonomy_group": "",
"desc": "Dietitian, Registered",
"state": "MD",
"license": "DX7275",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": [
{
"first_name": "MARY",
"last_name": "DAWSON",
"credential": "RD, LD",
"code": "1",
"type": "Former Name"
}
]
}Other providers in Derwood, MD
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 22, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.