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

Grayson Breneman Ashby, MD

Individual provider Ophthalmology Physician · NPI 1598414641

Grayson Breneman Ashby, MD is an Ophthalmology in Nashville, Tennessee. Graduated from Mayo Medical School in 2022, 4 years ago. Practices with Mayo Clinic, a 4,796-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Minnesota and Tennessee.

Years since qualifying
4
Trained at
Mayo Medical School
Licensed in
MN, TN
In the registry since
2022
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1301 Medical Center Dr
Nashville, TN 37232-0028
Phone: (615) 322-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 200 1st St Sw, Rochester, MN 55905-0001 — (507) 284-2511

Specialties & licences

Pediatric Ophthalmology and Strabismus Specialist Physician (primary) Taxonomy 207WX0110X · Licence 77046 (TN)
Ophthalmology Physician Taxonomy 207W00000X · Licence 32438 (MN)
Ophthalmology Physician Taxonomy 207W00000X · Licence 74599 (MN)

Record details

NPI number1598414641
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 23, 2022
Last updated in NPPESJuly 7, 2026
Certification dateJuly 7, 2026
Mailing address3841 Green Hills Village Dr Ste 200, Nashville, TN 37215-2691

Medicare enrollment

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

Medicare specialtyOPHTHALMOLOGY
Medical schoolMAYO MEDICAL SCHOOL
Graduated 2022 (4 years in practice)
Group practice Mayo Clinic — 4796 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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