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

Madelyn Carnahan, MS, RDN, LD

Individual provider Registered Dietitian · NPI 1124873542

Madelyn Carnahan, MS, RDN, LD is a Registered Dietitian OR Nutrition Professional in Defiance, Ohio. Qualified in 2022, 4 years ago. Practices with Healthy Hearts Nutrition LLC, a 10-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Indiana and Ohio.

Years since qualifying
4
Licensed in
IN, OH
In the registry since
2024
Specialties on file
2
What do these letters mean?
MS — Master of Science
A graduate science degree.
RDN — Registered Dietitian Nutritionist
The current title for a registered dietitian.
LD — Licensed Dietitian
A dietitian licensed by a state board.

See every abbreviation used in this directory →

Practice location Address checks out

724 Inverness Dr
Defiance, OH 43512-8549
Phone: (419) 980-9813
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 4359 E Enon Rd, Yellow Springs, OH 45387-9708 — (937) 206-1131

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X · Licence LD.10548 (OH)
Registered Dietitian Taxonomy 133V00000X · Licence 37003994A (IN)

Record details

NPI number1124873542
Entity typeIndividual (Type 1)
GenderFemale
Credentials MS , RDN , LD
Sole proprietorYes
NPI enumeratedApril 19, 2024
Last updated in NPPESJune 10, 2026
Certification dateJune 10, 2026

Medicare enrollment

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

Medicare specialtyREGISTERED DIETITIAN OR NUTRITION PROFESSIONAL
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Group practice Healthy Hearts Nutrition Llc — 10 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Defiance