Physician Profile
Unclaimed ProfileAbout ASHBY
Grayson Breneman Ashby, MD is a healthcare provider in Nashville, TN specializing in ophthalmology. Grayson trained at Mayo Medical School, graduating in 2022. Grayson is also listed as specializing in ophthalmology — pediatric. Medicare claims data shows Grayson provided 245 services to 179 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (615) 322-3000
- Email not available
Practice Locations
1301 MEDICAL CENTER DR
Nashville, TN 37232
Procedures Most Often Billed to Medicare
245 services · 179 patients · 7 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Imaging of retina | Treatment | 92134 |
34 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
95 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
42 |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
26 |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
21 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
15 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
12 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other ophthalmology specialists in Nashville 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Mayo Medical School 8
Other providers in the same specialty who trained at the same institution.
Class of 2022 at Mayo Medical School 8
Providers who graduated from the same medical school in the same year.
Also performs Imaging of retina 8
Providers in TN who bill this service to Medicare most often.
Common questions
What does Dr. Ashby specialize in?
Dr. Ashby is an ophthalmology in Nashville, TN. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “OPHTHALMOLOGY”.
NPI registry
Where is Dr. Ashby located?
Dr. Ashby is listed at 1301 MEDICAL CENTER DR, Nashville, TN 37232. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Ashby's phone number?
The number on file is (615) 322-3000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Ashby?
Dr. Ashby's National Provider Identifier is 1598414641. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Ashby go to medical school?
Dr. Ashby attended Mayo Medical School, graduating in 2022. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Ashby have?
Dr. Ashby has 4 years experience. Calculated from a graduation year of 2022, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Ashby do most often?
According to Medicare billing data, Dr. Ashby provides treatments such as imaging of retina, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Ashby's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ashby. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.