Charles Nassauer, O.D.
NPI 1275677783 · Optometrist · Slidell, LA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Nassauer, O.D. is a Optometrist provider in Slidell, LA (NPI 1275677783).
Provider details
- NPI number
- 1275677783
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 919183T (LA)
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
19 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
31 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 | 16 | $115 |
| New Patient Complete Exam of Visual System92004 | 15 | $136 |
Typical Medicare-allowed amounts for these services range $115–$136 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 45 | 12 |
| Prednisolone Acetate | 29 | 28 |
| Brimonidine Tartrate | 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.
$212 across 6 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
- 2007-02-16
- Last updated
- 2022-07-12
- Certified
- 2022-07-12
Frequently asked questions
- What is Charles Nassauer's NPI number?
- Charles Nassauer's National Provider Identifier (NPI) is 1275677783, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Nassauer's specialty?
- Charles Nassauer is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Charles Nassauer located?
- Charles Nassauer's practice location on file with NPPES is 170 Northshore Blvd Ste C, Slidell, LA 70460-6849.
- What is Charles Nassauer's phone number?
- The practice phone number listed in the NPPES registry for Charles Nassauer is (985) 641-1228.
- Does Charles Nassauer accept Medicare?
- Charles Nassauer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Nassauer's NPI active?
- Yes — Charles Nassauer's NPI (1275677783) is active in the NPPES registry as of the last update on 2022-07-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.