John Whitman Prenshaw, M.D.
Ophthalmology Physician · Chattanooga, TN
John Whitman Prenshaw, M.D. is an ophthalmology physician with a practice address in Chattanooga, Tennessee, and NPI 1164869475, issued on May 28, 2013. Check the license (Tennessee 65541, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John Whitman Prenshaw
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- 65541 TN
94783 GA
2017-00665 NC
Self-reported in NPPES; status is on the state search - Practice location
- 7320 Shallowford RD, Chattanooga, TN 37421
- Phone
- (423) 894-5300
- Enumerated
- May 28, 2013
- Record last updated
- Jan 18, 2024
- Medicare enrollment
- Enrolled (PECOS I20221014000007); accepts Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 2013
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 366 in Tennessee → Look up another NPI →
Also registered at 7320 Shallowford RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marissa Garmon, MSN, RN, CPNPPediatric Nurse Practitioner1093952475
Verify John Whitman Prenshaw in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 65541Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average ophthalmology physician in 2024
293 Medicare Part D claims for 134 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 42% of claims. 11 claims were for opioids.
Most prescribed
- Latanoprost64 claims
- Prednisolone Acetate60 claims
- Moxifloxacin27 claims
- Ketorolac Tromethamine22 claims
- Miebo14 claims
- Tobramycin-Dexamethasone14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 91.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $685.93
19 payments; by number, the most common kind was food and beverage; the largest payer was Sight Sciences, Inc. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Jonathan Woolfson MD PCChattanooga, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Whitman Prenshaw among 366 ophthalmology physician records in Tennessee
John Whitman Prenshaw, M.D. is one of 366 ophthalmology physician records with a practice address in Tennessee. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 78% of them.
- NPI issued2013 · 78% of these records are older, 20% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2013 · median 2002 among the 247 with a school on file
- Record last updated2024 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Tennessee
There are 366 ophthalmology physician records in Tennessee.
All 366 in Tennessee → Every provider in Chattanooga → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Steven Anderson, M.D.Chattanooga, TN 374211295732063
- John Bierly, MDChattanooga, TN 374211831193515
- Deborah Distefano, MDChattanooga, TN 374211932172558
- John Kim, MDChattanooga, TN 374211811928245
- Thomas Lindquist, MDChattanooga, TN 374211184853947
- Elizabeth Mabry, M.D.Chattanooga, TN 374211992702021
- Dennis Matzkin, M.D.Chattanooga, TN 374211912968371
- John Miller, M.D.Chattanooga, TN 374211336159946
Common questions
What is John Whitman Prenshaw, M.D.'s NPI number?
John Whitman Prenshaw, M.D.'s National Provider Identifier (NPI) is 1164869475, issued on May 28, 2013. An NPI identifies a provider in billing; it is not a license.
Where is John Whitman Prenshaw, M.D. located?
The NPPES record lists a practice address at 7320 Shallowford RD, Chattanooga, TN, 37421. Phone: (423) 894-5300. Providers update this record themselves, so call before visiting.
How can I verify John Whitman Prenshaw, M.D.'s license?
NPPES lists Tennessee license number 65541, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Whitman Prenshaw, M.D. prescribe under Medicare Part D?
In 2024, John Whitman Prenshaw, M.D. had 293 Medicare Part D claims for 134 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is John Whitman Prenshaw, M.D.'s MIPS final score?
The 2023 MIPS final score is 91.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.