CATHIE GANTNER OVERMYER M.D.
NPI 1760437263
Internal Medicine in Jackson, WY

Q: What is Cathie Overmyer's NPI number?

The NPI number for Cathie Overmyer is 1760437263. It was assigned to this individual provider in the NPPES registry on May 23, 2006. The provider is also known as Cathie Gantner-Overmyer.

Q: What is Cathie Overmyer's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Cathie Overmyer was last updated on January 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 months 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.

Active since May 23, 2006PECOS EnrolledAccepts Medicare Assignment

555 E BROADWAY AVE STE 201, JACKSON, WY 83001(307) 733-7222(307) 739-4828 Get Directions Write a Review

NPPES record last updated: January 21, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 11, 2024, Jun 28, 2016 (2 updates tracked since 2016).

On this page

About Cathie Gantner Overmyer M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CATHIE GANTNER OVERMYER M.D. (NPI 1760437263) is an individual internal medicine provider in Jackson, Wyoming, licensed in Wyoming (16939A) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS, is affiliated with St Johns Medical Center, and maintains a secondary practice location in Jackson.

NPPES Registry Identity

NPI1760437263

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameCATHIE GANTNER OVERMYERCredential: M.D.

Location Address555 E BROADWAY AVE STE 201Jackson, WY 83001-8640

Mailing AddressPo Box 428Jackson, WY 83001-0428 · (307) 733-3636 · Fax (877) 205-2024

Phone(307) 733-7222

Fax(307) 739-4828

Sole ProprietorNo

Medical School CMSUniversity Of Wisconsin School Of MedicineGraduated 1985

Enumeration DateMay 23, 2006

Last NPPES UpdateJanuary 21, 20252 updates tracked since enumeration

NPPES CertifiedJanuary 21, 2025

✔ NPI 1760437263 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

Licenses✔ Licensed in WY · 16939A✔ Licensed in IL · 036083495

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

555 E BROADWAY AVE STE 201, Jackson, WY 83001

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Other Names 1

Former Name (1)Cathie Gantner-overmyer

Secondary Practice Location 1

Location 1625 E Broadway AveJackson, WY 83001-8642 · Phone (307) 733-3636 · Fax (877) 205-2024

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Wyoming, Medica, UnitedHealthcare.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

Cathie Gantner Overmyer M.d. 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.

PECOS PAC ID3678769403

PECOS Enrollment IDI20240909002310

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Cathie Overmyer reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Teton County Hospital District

0.1 mi

General Practice

625 E BROADWAY AVE
Jackson, WY 83001

Reassigned Medicare billing, Wyoming enrollment
114 clinicians in this Medicare group

NPI 1487818605 (307) 733-3636

Rush University Medical Center

1,164 mi

Internal Medicine

2011 YORK ROAD, 2ND FLOOR
Oak Brook, IL 60523

Reassigned Medicare billing, Illinois enrollment
Medicare enrollment name: Rush University Medical Group
2,169 clinicians in this Medicare group

NPI 1801375696 (630) 724-1310

Rush Oak Park ER Physicians Group

1,170 mi

Emergency Medical Services

520 S MAPLE AVE, EMERGENCY DEPARTMENT
Oak Park, IL 60304

Reassigned Medicare billing, Illinois enrollment
124 clinicians in this Medicare group

NPI 1447260880 (708) 660-5995

Rush Oak Park Physicians Group Center For Diabetes And Endocrine

1,170 mi

Endocrinology, Diabetes & Metabolism

520 S MAPLE AVE, 3RD FLOOR
Oak Park, IL 60304

Reassigned Medicare billing, Illinois enrollment
16 clinicians in this Medicare group

NPI 1841560141 (708) 660-5900

Rush Oak Park Physicians Group Adult Medicine

1,170 mi

Adult Medicine

610 S MAPLE AVE, SUITE 4600
Oak Park, IL 60304

Reassigned Medicare billing, Illinois enrollment
51 clinicians in this Medicare group

NPI 1548531924 (708) 660-2240

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

16 services15 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

St Johns Medical Center

Acute Care Hospitals · Jackson, WY

5/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number530015

Location625 East BroadwayJackson, WY 83001 · Teton County

Emergency services Birthing friendly

Star Valley Medical Center

Critical Access Hospitals · Afton, WY

OwnershipGovernment - Hospital District or Authority

CMS Certification Number531313

Location901 Adams StreetAfton, WY 83110 · Lincoln County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 83001 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$129.37 typical visit price

range $56.42 – $170.72

Typical copayment $32.34 (range $14.10 – $42.68)

Most-billed visit code 99204

Established Patient

$99.46 typical visit price

range $18.19 – $139.32

Typical copayment $24.86 (range $4.54 – $34.83)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

19 suppliers38 claims112 services$6.20 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

9 suppliers16 claims25 services$1.14 avg. paid by Medicare

Transport chair, adult size, patient weight capacity up to and including 300 pounds E1038

DME-Other DME · category DE000N

1 supplier11 claims11 services$5.87 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SUSANNE M SCHENK RN, CDE

Registered Nurse (Diabetes Educator)

555 E BROADWAY AVE STE 201
JACKSON, WY 83001

Teton County (307) 739-7678

GLENN EDWARD BURNETT II MD

Internal Medicine

555 E BROADWAY AVE STE 201
JACKSON, WY 83001

Teton County (307) 733-7222

NANCY A WALDROP LPC

Counselor (Professional)

555 E BROADWAY AVE STE 201
JACKSON, WY 83001

Teton County (307) 733-7222

OLGA BAEVA JOHNSON FNP-C

Nurse Practitioner (Family)

555 E BROADWAY AVE STE 201
JACKSON, WY 83001

Teton County (307) 733-7222

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 Cathie Overmyer's NPI number?

The NPI number for Cathie Overmyer is 1760437263. It was assigned to this individual provider in the NPPES registry on May 23, 2006. The provider is also known as Cathie Gantner-Overmyer.

Where is Cathie Overmyer located?

Cathie Overmyer practices at 555 E Broadway Ave Ste 201, Jackson, WY 83001. The listed phone number is (307) 733-7222.

What is Cathie Overmyer's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Cathie Overmyer enrolled in Medicare?

Yes. Cathie Overmyer 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 Cathie Overmyer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cathie Overmyer reassigns Medicare benefits to 5 organizations: Teton County Hospital District (Jackson, WY), Rush University Medical Center (Oak Brook, IL), Rush Oak Park ER Physicians Group (Oak Park, IL), Rush Oak Park Physicians Group Center For Diabetes And Endocrine (Oak Park, IL) and Rush Oak Park Physicians Group Adult Medicine (Oak Park, IL). 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 Cathie Overmyer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Cathie Overmyer accept?

Health plans from Blue Cross Blue Shield of Wyoming, Medica and UnitedHealthcare list Cathie Overmyer 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 Cathie Overmyer affiliated with any hospitals?

According to CMS data, Cathie Overmyer is affiliated with St Johns Medical Center and Star Valley Medical Center.

When was this NPI record last updated?

The NPPES record for Cathie Overmyer was last updated on January 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 months 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.