GRAYSON BRENEMAN ASHBY MD
NPI 1598414641
Ophthalmology - Pediatric Ophthalmology and Strabismus Specialist in Nashville, TN

Q: What is Grayson Ashby's NPI number?

The NPI number for Grayson Ashby is 1598414641. It was assigned to this individual provider in the NPPES registry on March 23, 2022.

Q: What is Grayson Ashby's specialty?

The primary specialty registered for this NPI is Ophthalmology, specializing in Pediatric Ophthalmology and Strabismus Specialist, with taxonomy code 207WX0110X.

Q: When was this NPI record last updated?

The NPPES record for Grayson Ashby was last updated on July 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 23, 2022PECOS EnrolledAccepts Medicare Assignment

1301 MEDICAL CENTER DR, NASHVILLE, TN 37232(615) 322-3000 Get Directions Write a Review

NPPES record last updated: July 7, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 7, 2026, Jul 11, 2023 (2 updates tracked since 2023).

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About Grayson Breneman Ashby Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GRAYSON BRENEMAN ASHBY MD (NPI 1598414641) is an individual pediatric ophthalmology and strabismus specialist in Nashville, Tennessee, licensed in Tennessee (77046) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS, is affiliated with Mayo Clinic Hospital Rochester, and maintains a secondary practice location in Rochester.

NPPES Registry Identity

NPI1598414641

Entity TypeIndividualMale

Primary Taxonomy207WX0110X

Provider Legal NameGRAYSON BRENEMAN ASHBYCredential: MD

Location Address1301 MEDICAL CENTER DRNashville, TN 37232-0028

Mailing Address3841 Green Hills Village Dr Ste 200Nashville, TN 37215-2691 · (615) 322-6842 · Fax (615) 322-5048

Phone(615) 322-3000

Sole ProprietorNo

Medical School CMSOtherGraduated 2022

Enumeration DateMarch 23, 2022

Last NPPES UpdateJuly 7, 20262 updates tracked since enumeration

NPPES CertifiedJuly 7, 2026

✔ NPI 1598414641 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOphthalmology · Pediatric Ophthalmology and Strabismus SpecialistAllopathic & Osteopathic Physicians

Taxonomy Code207WX0110X

License✔ Licensed in TN · 77046

Definition

An ophthalmologist who specializes in pediatric ophthalmology and strabismus management. The subspecialty includes the medical and surgical management of eye disorders found in children. Some of the more common disorders include amblyopia, strabismus, refractive error, cataract and glaucoma. These disorders may be related to neurological and endocrinological diseases, trauma, or aging changes in the extraocular muscles requiring medical, optical and surgical management.

Also ListedOphthalmologyTaxonomy 207W00000X · License 32438 (MN), 74599 (MN)

1301 MEDICAL CENTER DR, Nashville, TN 37232

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Secondary Practice Location 1

Location 1200 1st St SWRochester, MN 55905-0001 · Phone (507) 284-2511

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include BlueCross BlueShield of Tennessee, Oscar Insurance Company.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Grayson Breneman Ashby Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5092196642

PECOS Enrollment IDI20230801002755

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Grayson Ashby reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Vanderbilt University Medical Center

Same address

Internal Medicine

1301 22ND AVE S
Nashville, TN 37232

Reassigned Medicare billing, Tennessee enrollment
4,711 clinicians in this Medicare group

NPI 1104202761 (615) 936-2000

Mayo Clinic

620 mi

Infectious Disease

200 1ST ST SW
Rochester, MN 55905

Reassigned Medicare billing, Minnesota enrollment
6,534 clinicians in this Medicare group

NPI 1114343860 (507) 284-2511

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

95 services66 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

42 services27 patients

Imaging of retina 92134

Imaging of the retina is a non-invasive procedure that captures detailed images of your eye's interior. This helps detect conditions like macular degeneration or retinal detachment. It's painless and takes only a few minutes.

34 services23 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

21 services19 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

15 services15 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

12 services12 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mayo Clinic Hospital Rochester

Acute Care Hospitals · Rochester, MN

5/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number240010

Location1216 Second Street SouthwestRochester, MN 55902 · Olmsted County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 37232 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$121.80 typical visit price

range $52.64 – $160.89

Typical copayment $30.45 (range $13.16 – $40.22)

Most-billed visit code 99204

Established Patient

$66.01 typical visit price

range $16.72 – $131.41

Typical copayment $16.50 (range $4.18 – $32.85)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARK ANDREW KACHAN DPM

Podiatrist