DR. JOHN WHITMAN PRENSHAW M.D.
NPI 1164869475
Ophthalmology in Chattanooga, TN

Q: What is John Prenshaw's NPI number?

The NPI number for John Prenshaw is 1164869475. It was assigned to this individual provider in the NPPES registry on May 28, 2013.

Q: What is John Prenshaw's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Q: When was this NPI record last updated?

The NPPES record for John Prenshaw was last updated on January 18, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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 May 28, 2013PECOS EnrolledAccepts Medicare Assignment

91.9/100

CMS Quality Rating

7320 SHALLOWFORD RD, CHATTANOOGA, TN 37421(423) 894-5300 Get Directions Write a Review

NPPES record last updated: January 18, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 7, 2022, Aug 5, 2020 (2 updates tracked since 2020).

On this page

About Dr. John Whitman Prenshaw M.d. NPPES

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

DR. JOHN WHITMAN PRENSHAW M.D. (NPI 1164869475) is an individual ophthalmology provider in Chattanooga, Tennessee, licensed in Tennessee (65541) and active in the NPI registry since May 2013. He is enrolled in Medicare PECOS, is affiliated with Adventhealth Murray, and is a graduate of University Of Tennessee, Hsc, College Of Medicine (2013).

NPPES Registry Identity

NPI1164869475

Entity TypeIndividualMale

Primary Taxonomy207W00000X

Provider Legal NameDR. JOHN WHITMAN PRENSHAWCredential: M.D.

Location Address7320 SHALLOWFORD RDChattanooga, TN 37421-4941

Mailing Address7305 Jarnigan Rd Ste 100Chattanooga, TN 37421-4875 · (423) 894-5300

Phone(423) 894-5300

Sole ProprietorNo

Medical School CMSUniversity Of Tennessee, Hsc, College Of MedicineGraduated 2013

Enumeration DateMay 28, 2013

Last NPPES UpdateJanuary 18, 20242 updates tracked since enumeration

NPPES CertifiedJanuary 18, 2024

✔ NPI 1164869475 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians

Taxonomy Code207W00000X

Licenses✔ Licensed in TN · 65541✔ Licensed in NC · 2017-00665✔ Licensed in GA · 94783

Definition

An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

7320 SHALLOWFORD RD, Chattanooga, TN 37421

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Alliant Health Plans, Inc., Ambetter from Absolute Total Care, Ambetter Health and more.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

Dr. John Whitman Prenshaw M.d. 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 ID9436393162

PECOS Enrollment IDI20221014000007, I20250506002636

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 John Prenshaw reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Jonathan Woolfson, MD, PC

57 mi

Ophthalmology

150 INTERSTATE SOUTH DR, SUITE 200
Jasper, GA 30143

Reassigned Medicare billing, Georgia and Tennessee enrollments
Also billed through NPI 1891935599 (Tennessee)
34 clinicians in this Medicare group

NPI 1508196601 (706) 253-2267

White Eye Associates PA

439 mi

Ophthalmology

301 BOWMAN GRAY DR
Greenville, NC 27834

Reassigned Medicare billing, North Carolina enrollment
10 clinicians in this Medicare group

NPI 1366557803 (252) 758-5800

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 16

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.

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.

396 services396 patients

Removal of cataract with insertion of prosthetic lens 66984

This is a procedure where a cloudy lens in your eye, known as a cataract, is removed. After removal, a clear artificial lens is inserted. This helps to restore your vision, enabling you to see clearly again.

365 services206 patients

Measurement of corneal curvature and depth of eye 92136

This procedure measures the shape and depth of your eye, specifically the cornea, the clear front surface. It helps in diagnosing conditions, planning for surgeries, or fitting contact lenses. It's non-invasive and painless.

269 services260 patients

Removal of recurring cataract in lens capsule using a laser 66821

This procedure, known as YAG laser capsulotomy, treats cloudiness in the lens capsule following cataract surgery. A laser is used to create a small hole in the cloudy capsule, allowing light to pass through and restore clear vision. It's a quick, painless procedure.

133 services126 patients

Ct scan of cornea 92025

A CT scan of the cornea is a non-invasive imaging test that uses X-rays to capture detailed pictures of your eye's cornea. It helps in diagnosing diseases or damage, planning for surgery, or evaluating the results of a treatment. It's a safe and painless procedure.

106 services106 patients

Exam of the internal drainage system of eye 92020

This is a procedure where your doctor examines the eye's internal drainage system, essential for maintaining eye pressure. They use specialized tools to check for blockages or damage that might lead to conditions like glaucoma. It's non-invasive and painless.

55 services55 patients

Laser repair to improve eye fluid flow 65855

Laser repair to improve eye fluid flow is a procedure aimed at treating glaucoma. A laser is used to create a small hole in the eye's drainage system, allowing fluid to flow out more easily. This helps to lower the pressure inside the eye, reducing the risk of vision loss.

38 services24 patients

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.

35 services27 patients

Complex removal of cataract with insertion of prosthetic lens 66982

This procedure involves removing a cloudy lens (cataract) from your eye and replacing it with a clear, artificial lens. It helps restore vision that has been affected by the cataract. The operation is usually done under local anesthesia.

34 services22 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.

34 services28 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.

29 services28 patients

Extracapsular removal of cataract with insertion of artificial lens and insertion of drainage device in front chamber of eye 66991

This is a two-part eye procedure. First, a cloudy lens (cataract) is removed from its outer layer and replaced with an artificial lens to improve vision. Second, a drainage device is inserted into the front part of the eye to manage fluid levels, preventing pressure build-up.

24 services15 patients

Imaging of optic nerve 92133

Imaging of the optic nerve is a non-invasive procedure that captures detailed pictures of your optic nerve. It helps doctors assess eye health, particularly for conditions like glaucoma. It's painless, quick, and uses safe technology like MRI or OCT (Optical Coherence Tomography).

21 services20 patients

New patient complete exam of visual system 92004

A new patient complete exam of the visual system is a thorough evaluation of your eyes and vision. It checks for any potential issues and assesses overall eye health. It includes tests for visual acuity, eye movement, and light response.

18 services18 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.

18 services18 patients

Established patient complete exam of visual system 92014

An established patient complete exam of the visual system involves a thorough check of your eyes and vision. It assesses eye health, checks for diseases, and measures your ability to see clearly at different distances. It's a routine, non-invasive procedure.

13 services13 patients

Hospital Affiliations CMS Care Compare 2

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

Adventhealth Murray

Acute Care Hospitals · Chatsworth, GA

OwnershipVoluntary non-profit - Private

CMS Certification Number110050

Location707 Old Dalton Ellijay Road, PO Box 1406Chatsworth, GA 30705 · Murray County

Emergency services

Fort Loudoun Medical Center

Acute Care Hospitals · Lenoir City, TN

5/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number440110

Location550 Fort Loudon Medical Center DrLenoir City, TN 37772 · Loudon County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 37421 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

91.9/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

79.16

Promoting Interoperability

Improvement Activities

Cost

94.68

Other Providers at the Same Location NPPES

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

MARISSA ANNE GARMON MSN, RN, CPNP

Nurse Practitioner (Pediatrics)

7320 SHALLOWFORD RD, SUITE B
CHATTANOOGA, TN 37421

Hamilton County (423) 648-6483

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Prenshaw's NPI number?

The NPI number for John Prenshaw is 1164869475. It was assigned to this individual provider in the NPPES registry on May 28, 2013.

Where is John Prenshaw located?

John Prenshaw practices at 7320 Shallowford Rd, Chattanooga, TN 37421. The listed phone number is (423) 894-5300.

What is John Prenshaw's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is John Prenshaw enrolled in Medicare?

Yes. John Prenshaw is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for John Prenshaw's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Prenshaw reassigns Medicare benefits to 2 organizations: Jonathan Woolfson, MD, PC (Jasper, GA) and White Eye Associates PA (Greenville, NC). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Prenshaw's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does John Prenshaw accept?

Health plans from Alliant Health Plans, Inc., Ambetter Health, Ambetter from Absolute Total Care, Ambetter of Alabama and Ambetter of North Carolina and 3 other insurers list John Prenshaw as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is John Prenshaw affiliated with any hospitals?

According to CMS data, John Prenshaw is affiliated with Adventhealth Murray and Fort Loudoun Medical Center.

When was this NPI record last updated?

The NPPES record for John Prenshaw was last updated on January 18, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.