Thomas Castillo, DO
NPI 1700805454 · Ophthalmology Physician · Beaver Dam, WI
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Castillo, DO is a Ophthalmology Physician provider in Beaver Dam, WI (NPI 1700805454).
Provider details
- NPI number
- 1700805454
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 40496 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
320 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 115 | $120 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 62 | $85 |
| Exam of Visual Field With Extended Testing92083 | 45 | $60 |
| Imaging of Optic Nerve92133 | 45 | $32 |
| Imaging of Retina92134 | 31 | $38 |
| Photography of the Retina92250 | 22 | $34 |
Typical Medicare-allowed amounts for these services range $32–$120 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 340 | 116 |
| Timolol Maleate | 103 | 35 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 96 | 31 |
| Brimonidine Tartrate | 51 | 22 |
| Dorzolamide Hcl | 33 | 13 |
| Bimatoprostbrand: Lumigan | 15 | — |
| Brimonidine Tartratebrand: Alphagan P | 11 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-19
- Last updated
- 2024-05-01
- Certified
- 2024-05-01
Frequently asked questions
- What is Thomas Castillo's NPI number?
- Thomas Castillo's National Provider Identifier (NPI) is 1700805454, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Castillo's specialty?
- Thomas Castillo is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Castillo located?
- Thomas Castillo's practice location on file with NPPES is 240 Corporate Drive, Beaver Dam, WI 53916-3115.
- What is Thomas Castillo's phone number?
- The practice phone number listed in the NPPES registry for Thomas Castillo is (920) 887-1151.
- Does Thomas Castillo accept Medicare?
- Thomas Castillo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Castillo's NPI active?
- Yes — Thomas Castillo's NPI (1700805454) is active in the NPPES registry as of the last update on 2024-05-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.