JOHN P FERRELL (OD) – Optometrist, NPI 1831181668
Optometrist
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
503 OPTOMETRY in IA
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Provider Addresses for JOHN P FERRELL (OD)
Wolfe Eye Clinic, 309, East Church Street, Marshalltown, Marshall County, Iowa, 50158, United States
MARSHALLTOWN, IA 501582946
Phone:
Type: Mailing
1620, Superior Street, Webster City, Hamilton County, Iowa, 50595, United States
UNIT 3
WEBSTER CITY, IA 505952913
Phone: (515) 832-2401
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2010-08-03
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20100803000899 | I | Optometry | IA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 50158)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| OPTOMETRY | IA | 92012 | Eye and medical examination for diagnosis and treatment, established patient | 454 | 407 |
| OPTOMETRY | IA | 92083 | Measurement of field of vision during daylight conditions | 55 | 55 |
| OPTOMETRY | IA | 92134 | Diagnostic imaging of retina | 16 | 16 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | MN | |
| Physician Assistant | MN | |
| P O D I A T R Y | KS | |
| Family Practice | IA | |
| General Practice, Family Practice | IA | |
| Clinical Social Worker | IA | |
| Physician Assistant | MN | |
| Nurse Practitioner | IA | |
| Nurse Practitioner | IA | |
| Nurse Practitioner | MN |
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