John Ferrell, OD
NPI 1831181668 · Optometrist · Webster City, IA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Ferrell, OD is a Optometrist provider in Webster City, IA (NPI 1831181668).
Provider details
- NPI number
- 1831181668
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- Sole proprietor
- No
- License
- 02089 (IA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 303 | 56 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 108 | 24 |
| Bimatoprostbrand: Lumigan | 86 | 13 |
| Timolol Maleate | 63 | 18 |
| Brimonidine Tartrate/Timololbrand: Combigan | 54 | — |
| Moxifloxacin Hclbrand: Moxifloxacin | 52 | 43 |
| Brimonidine Tartrate | 43 | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-18
- Last updated
- 2020-03-06
- Certified
- 2020-03-06
Frequently asked questions
- What is John Ferrell's NPI number?
- John Ferrell's National Provider Identifier (NPI) is 1831181668, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Ferrell's specialty?
- John Ferrell is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is John Ferrell located?
- John Ferrell's practice location on file with NPPES is 1620 Superior St, Webster City, IA 50595-2913.
- What is John Ferrell's phone number?
- The practice phone number listed in the NPPES registry for John Ferrell is (515) 832-2401.
- Does John Ferrell accept Medicare?
- John Ferrell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Ferrell's NPI active?
- Yes — John Ferrell's NPI (1831181668) is active in the NPPES registry as of the last update on 2020-03-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.