Marilyn Kosier, M.D.
NPI 1710169974 · Ophthalmology Physician · Lancaster, OH
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marilyn Kosier, M.D. is a Ophthalmology Physician provider in Lancaster, OH (NPI 1710169974).
Provider details
- NPI number
- 1710169974
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 35-05-6213K (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
1,492 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 | 302 | $117 |
| Established Patient Problem Focused Exam of Visual System92012 | 292 | $83 |
| Photography of the Retina92250 | 171 | $33 |
| Exam of Visual Field With Extended Testing92083 | 114 | $52 |
| Imaging of Optic Nerve92133 | 89 | $33 |
| Exam of the Internal Drainage System of Eye92020 | 81 | $26 |
| Imaging of Retina92134 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 34 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 352 | 226 |
| Latanoprost | 322 | 61 |
| Moxifloxacin Hclbrand: Moxifloxacin | 216 | 144 |
| Brimonidine Tartrate | 207 | 51 |
| Erythromycin Basebrand: Erythromycin | 187 | 122 |
| Ketorolac Tromethamine | 137 | 73 |
| Doxycycline Hyclate | 115 | 40 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$42 across 2 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
- 2007-11-29
- Last updated
- 2020-05-15
- Certified
- 2020-05-15
Frequently asked questions
- What is Marilyn Kosier's NPI number?
- Marilyn Kosier's National Provider Identifier (NPI) is 1710169974, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marilyn Kosier's specialty?
- Marilyn Kosier is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Marilyn Kosier located?
- Marilyn Kosier's practice location on file with NPPES is 1520 Sheridan Dr, Lancaster, OH 43130-1303.
- What is Marilyn Kosier's phone number?
- The practice phone number listed in the NPPES registry for Marilyn Kosier is (740) 654-0177.
- Does Marilyn Kosier accept Medicare?
- Marilyn Kosier is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marilyn Kosier's NPI active?
- Yes — Marilyn Kosier's NPI (1710169974) is active in the NPPES registry as of the last update on 2020-05-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.