GARTH KELLOGG SUMMERS DO
NPI 1659891687
Obstetrics & Gynecology in Oskaloosa, IA
About Garth Kellogg Summers Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GARTH KELLOGG SUMMERS DO (NPI 1659891687) is an individual obstetrics & gynecology provider in Oskaloosa, Iowa, licensed in Iowa (DO-05809) and active in the NPI registry since June 2017. He is enrolled in Medicare PECOS, is affiliated with Mahaska Health Partnership, and maintains a secondary practice location in Iowa City.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Garth Kellogg Summers Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Garth Summers reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oskaloosa, IA 52577
- Reassigned Medicare billing, Iowa enrollment
- Also billed through NPI 1407869852 (Iowa)
- 111 clinicians in this Medicare group
Mason City, IA 50401
- Reassigned Medicare billing, Iowa enrollment
- 65 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mahaska Health Partnership
Critical Access Hospitals · Oskaloosa, IAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 52577 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
OSKALOOSA, IA 52577
OSKALOOSA, IA 52577
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Garth Summers's NPI number?
The NPI number for Garth Summers is 1659891687. It was assigned to this individual provider in the NPPES registry on June 21, 2017.
Where is Garth Summers located?
Garth Summers practices at 1229 C Ave E, Oskaloosa, IA 52577. The listed phone number is (641) 676-7401.
What is Garth Summers's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Garth Summers enrolled in Medicare?
Yes. Garth Summers is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Garth Summers's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Garth Summers reassigns Medicare benefits to 2 organizations: Mahaska County Hospital (Oskaloosa, IA) and Mason City Clinic PC (Mason City, IA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Garth Summers's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Garth Summers accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan and Wellmark Health Plan of Iowa, Inc. list Garth Summers as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Garth Summers affiliated with any hospitals?
According to CMS data, Garth Summers is affiliated with Mahaska Health Partnership.
When was this NPI record last updated?
The NPPES record for Garth Summers was last updated on August 27, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Garth Kellogg Summers, DO · NPI 1659891687
Obstetrics & Gynecology physician in Oskaloosa, Iowa. Individual provider, active in the CMS NPPES registry since June 21, 2017.
## Identity
- **NPI:** 1659891687 (Entity type: Individual)
- **Enumerated:** June 21, 2017
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** DO-05809 (Iowa)
- **Sole proprietor:** No
## Practice location
- **Address:** 1229 C AVE E, Oskaloosa, IA 52577-4246
- **Phone:** (641) 676-7401 · **Fax:** (641) 676-7325
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Mahaska County Hospital (NPI 1356320659, Oskaloosa, IA); Mason City Clinic PC (NPI 1043254055, Mason City, IA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** August 27, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1659891687) · Data from the CMS NPPES public registry.