John Prenshaw, M.D.
NPI 1164869475 · Ophthalmology Physician · Chattanooga, TN
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Prenshaw, M.D. is a Ophthalmology Physician provider in Chattanooga, TN (NPI 1164869475).
Provider details
- NPI number
- 1164869475
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 2017-00665 (NC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,588 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 396 | $152 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 365 | $417 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 269 | $42 |
| Removal of Recurring Cataract in Lens Capsule Using a Laser66821 | 133 | $286 |
| Ct Scan of Cornea92025 | 106 | $30 |
| Exam of the Internal Drainage System of Eye92020 | 55 | $25 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 64 | 22 |
| Prednisolone Acetate | 60 | 53 |
| Moxifloxacin Hclbrand: Moxifloxacin | 27 | 15 |
| Ketorolac Tromethamine | 22 | 17 |
| Tobramycin/Dexamethasonebrand: Tobramycin-Dexamethasone | 14 | 11 |
| Perfluorohexyloctane/Pfbrand: Miebo | 14 | — |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$686 across 19 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-05-28
- Last updated
- 2024-01-18
- Certified
- 2024-01-18
Frequently asked questions
- What is John Prenshaw's NPI number?
- John Prenshaw's National Provider Identifier (NPI) is 1164869475, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Prenshaw's specialty?
- John Prenshaw is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is John Prenshaw located?
- John Prenshaw's practice location on file with NPPES is 7320 Shallowford Rd, Chattanooga, TN 37421-4941.
- What is John Prenshaw's phone number?
- The practice phone number listed in the NPPES registry for John Prenshaw is (423) 894-5300.
- Does John Prenshaw accept Medicare?
- John Prenshaw is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Prenshaw's NPI active?
- Yes — John Prenshaw's NPI (1164869475) is active in the NPPES registry as of the last update on 2024-01-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.