Dr. Cathie Gantner Overmyer, MD
- Medicare services, 2024
- 16
- Medicare patients, 2024
- 39
- Part D claims, 2024
- 1,195
- Hospital affiliations
- 2
- Industry payments
- $3,796
- Practice address
- PO Box 428, Jackson, WY 83001
- Practice phone
- Call (307) 733-3636
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Overmyer's professional email, personal email and mobile number
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Dr. Cathie Gantner Overmyer is an internist in Jackson, Wyoming
Dr. Overmyer practices at St. John's Health in Jackson, Wyoming, part of St. John's Health.
Dr. Overmyer's NPI, 1760437263, was assigned on May 23, 2006. Dr. Overmyer graduated from University of Wisconsin School of Medicine in 1985. Dr. Overmyer holds Wyoming license 16939A.
- NPI
- 1760437263NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3678769403
- NPI enumeration date
- May 23, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (307) 733-3636
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Cathie Gantner Overmyer practices at 2 locations in Jackson, Wyoming
Dr. Overmyer's primary practice is St. John's Health, at PO Box 428, Jackson, WY 83001 in Teton County. The practice phone is (307) 733-3636. Dr. Overmyer also practices at St Johns Medical Center, 625 E Broadway Ave, Jackson, WY 83001.
- St. John's HealthPrimaryPO Box 428, Jackson, WY 83001 · Teton CountyPhone(307) 733-3636
- St Johns Medical Center625 E Broadway Ave, Jackson, WY 83001 · Teton CountyPhone(307) 733-3636
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Cathie Gantner Overmyer is affiliated with 4 sites of care and 5 medical groups
Dr. Overmyer's primary practice is St. John's Health in Jackson, Wyoming, part of St. John's Health. Dr. Overmyer is also affiliated with Star Valley Health. The medical group on file is St. John's Health. Dmand AI also links Dr. Overmyer to 4 more medical groups, 1 group practice or clinic and 1 home health agency, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Cathie Gantner Overmyer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Overmyer practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. John's Health | Available with a free account |
| +3 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across St. John's Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Cathie Gantner Overmyer is one of 126 internists in Wyoming
Internal medicine is Dr. Overmyer's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Overmyer's licenses on file in 2 states: Wyoming and Illinois.
Specialties and state licenses
- Internal medicine, WyomingPrimary
- Illinois license
Internists near Dr. Overmyer
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Cathie Gantner Overmyer billed Medicare for 16 services in 2024
CMS data shows 16 Medicare services from Dr. Overmyer across 1 procedure code in 2024, for 39 Medicare patients. Medicare paid $138 for them. Every service was in an office.
Dr. Overmyer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 02024: 16
- Lab and pathology
- 2023: 432024: 0100%
- Tests and treatments
- 2023: 632024: 0100%
- Other services
- 2023: 3462024: 0100%
- Office and hospital visits
- 2023: 7742024: 0100%
Dr. Overmyer compared with the Wyoming median for internists, 2024
- Dr. Overmyer
- Wyoming median
- Medicare services
- 16vs 54397% below
- Medicare patients
- 39vs 25184% below
- Part D claims
- 803vs 2563.1 times
Medians across 132 internists in Wyoming with Dmand AI profiles that report each measure.
Dr. Overmyer's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Overmyer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Overmyer and other internists in Wyoming.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Cathie Gantner Overmyer treated 39 Medicare patients in 2024, average age 72
CMS counts 39 Medicare patients who saw Dr. Overmyer in 2024. The largest group is 65 to 74, with 21 patients. 46% of them have high blood pressure, and 38% have high cholesterol. Their average risk score is 0.62, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Overmyer's median patient age at 69, with 72% women.
Dr. Overmyer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Overmyer's Medicare patients by sex, 2024
- Women2564%
- Men1436%
Chronic conditions among Dr. Overmyer's Medicare patients, 2024
- High blood pressure46%
- High cholesterol38%
- Arthritis28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Overmyer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women72%
- Men28%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Cathie Gantner Overmyer wrote 1,195 Medicare Part D claims in 2024
In 2024, Dr. Overmyer wrote 1,195 Medicare Part D claims for 342 patients. 87% of them were for generic drugs. CMS names the drug for 803 of them, across 31 drugs with 11 or more claims each, at $12,945 in total drug cost. In 2023, CMS named 4,659 claims across 105 drugs.
Dr. Overmyer's Part D claims by kind of drug, 2024
- Generic1,045 claims87%
- Brand-name133 claims11%
- Other17 claims1%
Dr. Overmyer's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4,6592024: 80383%
Drugs named by CMS: 31 in 2024, 105 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Cathie Gantner Overmyer takes part in Medicare
Dr. Overmyer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Cathie Gantner Overmyer received $3,796 in industry payments from 2016 to 2017
CMS Open Payments shows 248 general payments to Dr. Overmyer from 25 drug and device companies from 2016 to 2017. Food and beverage make up the largest share, 100% of the total. Sanofi and Genzyme US Companies paid the most, $456.
General payments to Dr. Overmyer by program year, 2016 to 2017
General payments to Dr. Overmyer by kind, 2016 to 2017
- Food and beverage$3,789100%
- Education$60%
Companies that paid Dr. Overmyer the most, 2016 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Cathie Gantner Overmyer graduated from University of Wisconsin School of Medicine
Dr. Overmyer graduated from University of Wisconsin School of Medicine in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Cathie Gantner Overmyer's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Cathie Gantner Overmyer
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Cathie Gantner Overmyer's NPI number?
Dr. Cathie Gantner Overmyer's NPI number is 1760437263. It was assigned on May 23, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Cathie Gantner Overmyer?
Dr. Cathie Gantner Overmyer is an internist in Jackson, Wyoming. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Cathie Gantner Overmyer practice?
Dr. Overmyer practices at PO Box 428, Jackson, WY 83001. Dr. Overmyer also practices at 625 E Broadway Ave, Jackson, WY 83001. Dr. Overmyer's primary practice is St. John's Health in Jackson, Wyoming, part of St. John's Health. Dmand AI also links Dr. Overmyer to 4 medical groups, 1 group practice or clinic and 1 home health agency.
What is Dr. Cathie Gantner Overmyer's office phone number?
The practice phone on file for Dr. Overmyer is (307) 733-3636.
What is Dr. Cathie Gantner Overmyer's medical license number?
Dr. Overmyer holds Wyoming license 16939A, one of the licenses on file in 2 states.
Which states has Dr. Cathie Gantner Overmyer been licensed in?
Dmand AI has state licenses on file for Dr. Overmyer in Wyoming and Illinois.
Which hospitals is Dr. Cathie Gantner Overmyer affiliated with?
Dr. Overmyer practices at St. John's Health in Jackson, Wyoming. Dr. Overmyer is also affiliated with Star Valley Health.
What medical group is Dr. Cathie Gantner Overmyer part of?
Dr. Overmyer is linked to St. John's Health. Dmand AI links Dr. Overmyer to 4 more medical groups.
Does Dr. Cathie Gantner Overmyer accept Medicare?
Yes. CMS data shows Dr. Overmyer billed Medicare for 16 services in 2024, and Dr. Overmyer accepts Medicare assignment.
How many Medicare patients does Dr. Cathie Gantner Overmyer see?
CMS counts 39 Medicare patients who saw Dr. Overmyer in 2024, with an average age of 72.
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What services does Dr. Cathie Gantner Overmyer bill to Medicare?
In 2024, Dr. Overmyer's most billed Medicare services were surgery: heart and blood vessels (36415).
Where did Dr. Cathie Gantner Overmyer go to medical school?
Dr. Overmyer graduated from University of Wisconsin School of Medicine in 1985.
What drugs does Dr. Cathie Gantner Overmyer prescribe most?
In 2024 Medicare Part D data, Dr. Overmyer's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Rosuvastatin Calcium.
Has Dr. Cathie Gantner Overmyer received payments from drug or device companies?
CMS Open Payments shows $3,796 in general payments to Dr. Overmyer from 25 companies from 2016 to 2017. The largest total came from Sanofi and Genzyme US Companies.
How long has Dr. Cathie Gantner Overmyer been practicing?
Dr. Overmyer graduated from medical school in 1985, 41 years ago.
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