Mary Margaret Machaca, RD, LD
Registered Dietitian · Derwood, MD
Mary Margaret Machaca, RD, LD is a registered dietitian with a practice address in Derwood, Maryland, and NPI 1780476820, issued on May 22, 2025. Check the license (Maryland DX7275, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Margaret Machaca
- Credential
- RD, LD
- Primary taxonomy
- Registered Dietitian 133V00000X
- License number
- DX7275 MD
Self-reported in NPPES; status is on the state search - Practice location
- 7361 Calhoun PL Ste 600, Derwood, MD 20855
- Phone
- (301) 942-7600
- Enumerated
- May 22, 2025
- Record last updated
- May 22, 2025
- Medicare enrollment
- Enrolled (PECOS I20250602003617); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest registered dietitian records → All 1,124 in Maryland → Look up another NPI →
Verify Mary Margaret Machaca in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license DX7275Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Arthritis And Rheumatism Associates PCRockville, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Margaret Machaca among 1,124 registered dietitian records in Maryland
Mary Margaret Machaca, RD, LD is one of 1,124 registered dietitian records with a practice address in Maryland. 11% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 89% of them.
- NPI issued2025 · 89% of these records are older, 4% newer
- In a Medicare fileYes · 11% of these records are
- In the CMS Doctors and Clinicians fileYes · 13% of these records are
- Graduated2017 · median 2015 among the 143 with a school on file
- Record last updated2025 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 133V00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 registered dietitian records list a practice address in Derwood
They are 2 of the 423 NPPES records with a practice address in Derwood, and 1,124 registered dietitian records in Maryland.
All 1,124 in Maryland → Every provider in Derwood → Registered Dietitian nationwide →
The 8 registered dietitian records with the nearest ZIP codes
- Victoria Aurich, R.D., L.D.N.Rockville, MD 208551407120520
- Andrea Troutner, RD, LD, LDN, CDCESDerwood, MD 208551497921647
- Katherine Brown, MS, RDPotomac, MD 208541295352342
- Beth Dorman, MS,RDN,LDNPotomac, MD 208541740976331
- Natalie Eatedali, MS, RD, CDNPotomac, MD 208541114154689
- Sarah Johnston, RDPotomac, MD 208541891301958
- Juli Louttit, RDPotomac, MD 208541750737888
- Lynda McIntyrePotomac, MD 208541891871513
Common questions
What is Mary Margaret Machaca, RD, LD's NPI number?
Mary Margaret Machaca, RD, LD's National Provider Identifier (NPI) is 1780476820, issued on May 22, 2025. An NPI identifies a provider in billing; it is not a license.
Where is Mary Margaret Machaca, RD, LD located?
The NPPES record lists a practice address at 7361 Calhoun PL Ste 600, Derwood, MD, 20855. Phone: (301) 942-7600. Providers update this record themselves, so call before visiting.
How can I verify Mary Margaret Machaca, RD, LD's license?
NPPES lists Maryland license number DX7275, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.