Nathan Slezak, O.D.
NPI 1821300088 · Optometrist · Gaylord, MI
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Slezak, O.D. is a Optometrist provider in Gaylord, MI (NPI 1821300088).
Provider details
- NPI number
- 1821300088
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4901004573 (MI)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 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
641 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 | 267 | $117 |
| Photography of the Retina92250 | 142 | $34 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 65 | $85 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 55 | $94 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 35 | $122 |
| New Patient Complete Exam of Visual System92004 | 34 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 121 | 41 |
| Timolol Maleate | 23 | — |
| Fluorometholone | 19 | — |
| Prednisolone Acetate | 15 | 13 |
| Tobramycin/Dexamethasonebrand: Tobramycin-Dexamethasone | 14 | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$259 across 8 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
- 2010-07-05
- Last updated
- 2011-07-26
Frequently asked questions
- What is Nathan Slezak's NPI number?
- Nathan Slezak's National Provider Identifier (NPI) is 1821300088, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Slezak's specialty?
- Nathan Slezak is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Nathan Slezak located?
- Nathan Slezak's practice location on file with NPPES is 829 W Main St, Gaylord, MI 49735-1998.
- What is Nathan Slezak's phone number?
- The practice phone number listed in the NPPES registry for Nathan Slezak is (989) 732-6261.
- Does Nathan Slezak accept Medicare?
- Nathan Slezak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Slezak's NPI active?
- Yes — Nathan Slezak's NPI (1821300088) is active in the NPPES registry as of the last update on 2011-07-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.