ROBERT KOLLER (DO) – Family Medicine Physician, NPI 1043659550
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,656 FAMILY PRACTICE in IA
Provider Addresses for ROBERT KOLLER (DO)
621 S ILLINOIS AVE
SUITE 103
MASON CITY, IA 504015489
Phone: (641) 428-3041
Fax: (641) 428-3059
Type: Mailing
101 S TAYLOR AVE
MASON CITY, IA 504012849
Phone: (641) 428-7766
Fax: (641) 428-7788
Type: Location
8401 MARKET ST
BOARDMAN, OH 445126725
Phone: (330) 729-4298
Fax: (330) 729-1591
Type: Mailing
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: 2020-07-13
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Past revalidation due date
Earliest CMS due date was 2023-10-31 (952 days ago).
Enrollment records
4
Earliest due date
2023-10-31
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 |
|---|---|---|---|---|
| I20141008000957 | I | Hospitalist | IA | 2023-10-31 |
| I20190628002784 | I | Hospitalist | CO | TBD |
| I20200601001173 | I | Family Practice | IN | TBD |
| I20200713001236 | I | Family Practice | OH | TBD |
What to do next
- Verify current status on the CMS Revalidation Lookup Tool immediately.
- Complete revalidation in PECOS or contact your Medicare Administrative Contractor (MAC).
- Overdue revalidation can lead to deactivation of Medicare billing privileges.
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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 381 | 343 | $0 |
Insurance plans in this area (ZIP 50401)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| HOSPITALIST | IA | 81002 | Urinalysis, manual test | 17 | 15 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | OH | |
| Cardiovascular Disease (Cardiology) | OH | |
| Nurse Practitioner | OH | |
| Nurse Practitioner | OH | |
| O B S T E T R I C S/ G Y N E C O L O G Y | OH | |
| Nurse Practitioner | PA | |
| Radiation Oncology | PA | |
| H O S P I T A L I S T | OH | |
| N E U R O L O G Y | OH | |
| Family Practice | OH |
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