John Guest, MD
NPI 1235796780 · Ophthalmology Physician · Detroit, MI
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Provider details
- NPI number
- 1235796780
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4351044538 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
7 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
990 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 189 | $91 |
| Microfluid Analysis of Tears83861 | 188 | $22 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 71 | $39 |
| Established Patient Problem Focused Exam of Visual System92012 | 68 | $87 |
| Photography of the Retina92250 | 67 | $36 |
| New Patient Complete Exam of Visual System92004 | 66 | $144 |
| Exam of Visual Field With Extended Testing |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 69 | 30 |
| Tobramycin/Dexamethasonebrand: Tobramycin-Dexamethasone | 54 | 48 |
| Prednisolone Acetate | 49 | 39 |
| Brimonidine Tartrate | 36 | 17 |
| Bimatoprostbrand: Lumigan | 25 | — |
| Timolol Maleate | 24 | — |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 17 | 16 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$849 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
Additional practice locations (1)
- 18101 Oakwood BlvdDearborn, MI 48124-4089Phone: (313) 593-7795
Registry dates
- Enumerated
- 2019-05-21
- Last updated
- 2020-06-10
- Certified
- 2020-06-10
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.