John Fassio, MD
NPI 1689671638 · Ophthalmology Physician · Park City, UT
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Fassio, MD is a Ophthalmology Physician provider in Park City, UT (NPI 1689671638).
Provider details
- NPI number
- 1689671638
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 6778A (WY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
394 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 Complete Exam of Visual System92014 | 149 | $118 |
| Established Patient Problem Focused Exam of Visual System92012 | 86 | $83 |
| Imaging of Optic Nerve92133 | 55 | $33 |
| Exam of Visual Field With Extended Testing92083 | 43 | $59 |
| Imaging of Retina92134 | 22 | $37 |
| Exam of the Internal Drainage System of Eye92020 | 20 | $26 |
| New Patient Complete Exam of Visual System92004 |
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 | 221 | 62 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 57 | 21 |
| Ofloxacin | 32 | 24 |
| Timolol Maleate | 32 | 11 |
| Bimatoprostbrand: Lumigan | 27 | — |
| Prednisolone Acetate | 27 | 20 |
| Ketorolac Tromethamine | 26 | 19 |
| Brimonidine Tartrate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$45 across 1 record (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
- 2005-07-06
- Last updated
- 2024-12-12
- Certified
- 2024-12-12
Frequently asked questions
- What is John Fassio's NPI number?
- John Fassio's National Provider Identifier (NPI) is 1689671638, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Fassio's specialty?
- John Fassio is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is John Fassio located?
- John Fassio's practice location on file with NPPES is 2700 Homestead Rd, Park City, UT 84098-4857.
- What is John Fassio's phone number?
- The practice phone number listed in the NPPES registry for John Fassio is (435) 658-3090.
- Does John Fassio accept Medicare?
- John Fassio is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Fassio's NPI active?
- Yes — John Fassio's NPI (1689671638) is active in the NPPES registry as of the last update on 2024-12-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.