NPPES file of Aug 9, 2026

Cathie Gantner Overmyer, M.D.

Internal Medicine Physician · Jackson, WY

Cathie Gantner Overmyer, M.D. is an internal medicine physician with a practice address in Jackson, Wyoming, and NPI 1760437263, issued on May 23, 2006. Check the license (Wyoming 16939A, as entered in NPPES) on the Wyoming Board of Medicine; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1760437263
Name
Cathie Gantner Overmyer
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License numbers
16939A WY
036083495 IL
Self-reported in NPPES; status is on the state search
Practice location
555 E Broadway Ave Ste 201, Jackson, WY 83001
Phone
(307) 733-7222
Enumerated
May 23, 2006
Record last updated
Jan 21, 2025
Fax
(307) 739-4828
Medicare enrollment
Enrolled (PECOS I20240909002310); accepts Medicare assignment
Medical or professional school
University Of Wisconsin School Of Medicine, 1985
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 555 E Broadway Ave Ste 201

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Olga Baeva Johnson, FNP-CFamily Nurse Practitioner1942914395
  2. Glenn Burnett, MDInternal Medicine Physician1467400747
  3. Susanne Schenk, RN, CDEDiabetes Educator Registered Nurse1134637408
  4. Nancy Waldrop, LPCProfessional Counselor1699303826

Verify Cathie Gantner Overmyer in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWyoming Board of Medicine
    Search for license 16939A    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Wyoming license search

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62% fewer Medicare Part D claims than the average internal medicine physician in 2024

1,195 Medicare Part D claims for 342 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.

  1. Cathie Overmyer1,195
  2. Specialty average3,176

Most prescribed

  1. Atorvastatin Calcium117 claims
  2. Levothyroxine Sodium70 claims
  3. Rosuvastatin Calcium60 claims
  4. Amlodipine Besylate52 claims
  5. Lisinopril52 claims
  6. Simvastatin31 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Bills Medicare through one group practice

  1. Teton County Hospital DistrictJackson, WY

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

14 internal medicine physician records list a practice address in Jackson

They are 14 of the 608 NPPES records with a practice address in Jackson, and 134 internal medicine physician records in Wyoming.

All 14 in Jackson → All 134 in Wyoming → Every provider in Jackson →

Other internal medicine physician records in Wyoming

  1. Juli Ackerman, MDSheridan, WY1619292927
  2. Molly Adami, DNP, FNP-CLaramie, WY1285356857
  3. Jean Allais, MDLaramie, WY1457352478
  4. Patrick Allen, D.O.Cody, WY1992783948
  5. Richard Anderson, M.D.Cody, WY1346288263
  6. Cynthia Archer, MDJackson, WY1275629024
  7. Matthew Baechle, MDCheyenne, WY1194354613
  8. Todd Bainter, D.O.Lander, WY1427226034
  9. Ahmad Bashirimoghaddam, DORock Springs, WY1487144457
  10. Edward Bergin, MD, MSGillette, WY1982100988

Common questions

What is Cathie Gantner Overmyer, M.D.'s NPI number?

Cathie Gantner Overmyer, M.D.'s National Provider Identifier (NPI) is 1760437263, issued on May 23, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Cathie Gantner Overmyer, M.D. located?

The NPPES record lists a practice address at 555 E Broadway Ave Ste 201, Jackson, WY, 83001. Phone: (307) 733-7222. Providers update this record themselves, so call before visiting.

How can I verify Cathie Gantner Overmyer, M.D.'s license?

NPPES lists Wyoming license number 16939A, as entered by the provider. Search the Wyoming Board of Medicine at https://wyomedboard.wyo.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Cathie Gantner Overmyer, M.D. prescribe under Medicare Part D?

In 2024, Cathie Gantner Overmyer, M.D. had 1,195 Medicare Part D claims for 342 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.