Physician Profile
Andrew B. Johnston, MD
Unclaimed ProfileAbout Dr. Johnston
Based in Knoxville, TN, Andrew B. Johnston, MD is listed in the NPI registry under ophthalmology. Andrew graduated from University of Tennessee, Hsc, College of Medicine in 2018. Andrew is also listed as specializing in student in an organized health care education program. According to Medicare claims data, Andrew cared for 1,460 Medicare patients across 1,686 services. The services billed most often include established patient complete exam of visual system, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and photography of the retina.
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
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (658) 584-0905
- Email not available
Practice Locations
1124 E WEISGARBER RD STE 100
Knoxville, TN 37909
628 Smithview Dr
Maryville, TN 37803
10841 Hardin Valley Rd
Knoxville, TN 37932
1924 Alcoa Hwy # U-114
Knoxville, TN 37920
104 Keller Ln
Maryville, TN 37801
750 Winfield Dunn Pkwy Unit 120
Sevierville, TN 37876
437 S Illinois Ave
Oak Ridge, TN 37830
4613 Papermill Dr
Knoxville, TN 37909
4829 N Broadway St Ste 103
Knoxville, TN 37918
12744 Kingston Pike Ste 108
Knoxville, TN 37934
962 Dolly Parton Pkwy
Sevierville, TN 37862
Conditions Commonly Evaluated or Treated
Within Ophthalmology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Cornea and external eye
Eyelid and tear drainage
Refractive and focusing
- Astigmatism
- Eye misalignment (strabismus)
- Farsightedness
- Lazy eye (amblyopia)
- Nearsightedness
- Presbyopia
Retina and vitreous
Eye injuries
Inflammation, neurologic, and orbit
Retina & vitreous
Procedures & services
Most searched procedures
Examination and imaging
Cataract and lens
Corneal procedures
Eye diagnostics
Eye injuries
Eyelid surgery
Eyelid, tear duct, and muscle
Glaucoma
- Glaucoma drainage-device implantation
- Laser peripheral iridotomy
- Minimally invasive glaucoma surgery
- Selective laser trabeculoplasty
Laser eye surgery
Laser procedures
Laser vision correction
Refractive surgery
Tear duct & Orbit
Procedures Most Often Billed to Medicare
1,686 services · 1,460 patients · 17 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of cataract with insertion of prosthetic lens | Procedure | 66984 |
71 | As often as other peers in Ophthalmology |
| Removal of recurring cataract in lens capsule using a laser | Procedure | 66821 |
18 | Less often than most peers in Ophthalmology |
| Removal of excessive skin and fat of upper eyelid | Procedure | 15823 |
11 | Less often than most peers in Ophthalmology |
| Ultrasound scan of cornea to determine thickness | Imaging | 76514 |
14 | Less often than most peers in Ophthalmology |
| Established patient complete exam of visual system | Treatment | 92014 |
330 | As often as other peers in Ophthalmology |
| Photography of the retina | Treatment | 92250 |
173 | More often than most peers in Ophthalmology |
| Imaging of optic nerve | Treatment | 92133 |
151 | More often than most peers in Ophthalmology |
| Measurement of corneal curvature and depth of eye | Treatment | 92136 |
149 | As often as other peers in Ophthalmology |
| Exam of visual field with extended testing | Treatment | 92083 |
139 | More often than most peers in Ophthalmology |
| New patient complete exam of visual system | Treatment | 92004 |
97 | More often than most peers in Ophthalmology |
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.
Other eye doctors at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 7
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.
More connections — 29 related providers in 4 groups
Other eye doctors in Knoxville 5
Same specialty, same city.
Trained at University of Tennessee, Hsc, College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2018 at University of Tennessee, Hsc, College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of cataract with insertion of prosthetic lens 8
Providers in TN who bill this service to Medicare most often.
Common questions
What does Dr. Johnston specialize in?
Dr. Johnston is an eye doctor in Knoxville, TN. That is the designation recorded for this NPI in the federal registry, where it is listed as “Ophthalmology”.
NPI registry
Where is Dr. Johnston located?
Dr. Johnston is listed at 1124 E Weisgarber Rd Ste 100, Knoxville, TN 37909. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Johnston's phone number?
The number on file is (658) 584-0905. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Johnston's NPI number?
Dr. Johnston's National Provider Identifier is 1912404922. 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. Johnston go to medical school?
Dr. Johnston attended University of Tennessee, Hsc, College of Medicine, graduating in 2018. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Johnston been practicing?
Dr. Johnston has 8 years experience. Calculated from a graduation year of 2018, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Johnston do most often?
According to Medicare billing data, Dr. Johnston performs procedures including removal of cataract with insertion of prosthetic lens, removal of recurring cataract in lens capsule using a laser and removal of excessive skin and fat of upper eyelid; reads or performs imaging such as ultrasound scan of cornea to determine thickness; provides treatments such as established patient complete exam of visual system and photography of the retina, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Johnston confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Johnston. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.