Mark Fay, M.D.
NPI 1972563781 · Ophthalmology Physician · Klamath Falls, OR
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Fay, M.D. is a Ophthalmology Physician provider in Klamath Falls, OR (NPI 1972563781).
Provider details
- NPI number
- 1972563781
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G58765 (CA)
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
3,886 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) |
|---|---|---|
| Imaging of Retina92134 | 755 | $39 |
| Established Patient Complete Exam of Visual System92014 | 581 | $122 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 522 | $124 |
| Injection of Drug Into Eye67028 | 369 | $118 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 344 | $88 |
| Exam of Visual Field With Extended Testing92083 | 215 | $61 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 696 | 137 |
| Timolol Maleate | 242 | 64 |
| Ketorolac Tromethamine | 158 | 98 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 153 | 37 |
| Prednisolone Acetate | 153 | 100 |
| Brimonidine Tartrate | 134 | 35 |
| Ofloxacin | 126 | 83 |
| Netarsudil Mesylat/Latanoprost |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$16 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
Additional practice locations (1)
- 1201 Thomason LnAlturas, CA 96101-3150Phone: (530) 233-2020
Registry dates
- Enumerated
- 2006-03-24
- Last updated
- 2021-02-11
- Certified
- 2021-02-11
Frequently asked questions
- What is Mark Fay's NPI number?
- Mark Fay's National Provider Identifier (NPI) is 1972563781, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Fay's specialty?
- Mark Fay is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Fay located?
- Mark Fay's practice location on file with NPPES is 2640 Biehn St, Klamath Falls, OR 97601-1181.
- What is Mark Fay's phone number?
- The practice phone number listed in the NPPES registry for Mark Fay is (541) 884-3148.
- Does Mark Fay accept Medicare?
- Mark Fay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Fay's NPI active?
- Yes — Mark Fay's NPI (1972563781) is active in the NPPES registry as of the last update on 2021-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.