Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

MS. Alison H Massey, MS, RD, CDCES

Individual provider Registered Dietitian · NPI 1649502451

MS. Alison H Massey, MS, RD, CDCES is registered under Registered Dietitian OR Nutrition Professional in Prince Frederick, Maryland. Qualified in 2007, 19 years ago. Practices with Calvert Internal Medicine Group, PA, a 40-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Maryland.

Years since qualifying
19
Licensed in
MD
In the registry since
2010
What do these letters mean?
MS — Master of Science
A graduate science degree.
RD — Registered Dietitian
A credentialed nutrition professional.

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Practice location Address checks out

985 Prince Frederick Blvd Ste 201
Prince Frederick, MD 20678-3492
Phone: (410) 535-2005
Fax: (410) 535-4850
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X · Licence DX3059 (MD)

Record details

NPI number1649502451
Entity typeIndividual (Type 1)
GenderFemale
Credentials MS , RD , CDCES
Sole proprietorNo
NPI enumeratedFebruary 3, 2010
Last updated in NPPESJuly 3, 2023
Certification dateJuly 3, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyREGISTERED DIETITIAN OR NUTRITION PROFESSIONAL
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Group practice Calvert Internal Medicine Group, Pa — 40 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients123
Services billed 578 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Calvert Internal Medicine Group, PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 40 clinicians in the practice; 11 are shown here.

Other providers in Prince Frederick