Mary L. Geralts, MD
Internal Medicine Physician · Hartland, WI
Mary L. Geralts, MD is an internal medicine physician with a practice address in Hartland, Wisconsin, and NPI 1386759397, issued on Aug 20, 2006. Check the license (Wisconsin 34411, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Mary L. Geralts
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 34411 WI
Self-reported in NPPES; status is on the state search - Practice location
- 600 Walnut Ridge Dr, Hartland, WI 53029
- Phone
- (262) 369-6902
- Enumerated
- Aug 20, 2006
- Record last updated
- Aug 5, 2024
- Fax
- (262) 369-7041
- Medicaid ID
- 31947900 WI
- Medicare enrollment
- Enrolled (PECOS I20100610000581); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1986
- Entity
- Type 1 · individual
Also registered at 600 Walnut Ridge Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary L. Geralts in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 34411Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% more Medicare Part D claims than the average internal medicine physician in 2024
5,576 Medicare Part D claims for 508 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Losartan Potassium639 claims
- Levothyroxine Sodium372 claims
- Atorvastatin Calcium320 claims
- Amlodipine Besylate284 claims
- Lisinopril229 claims
- Pravastatin Sodium228 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
- Aurora Medical Group, Inc.Hartland, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
6 internal medicine physician records list a practice address in Hartland
They are 6 of the 193 NPPES records with a practice address in Hartland, and 2,078 internal medicine physician records in Wisconsin.
All 6 in Hartland → All 2,078 in Wisconsin → Every provider in Hartland →
Other internal medicine physician records in Wisconsin
- Sheetal Aatrai, MDMarshfield, WI1417568965
- Khalid Abdelgadir, MDManitowoc, WI1407433295
- Mesfin Abdissa, MDMilwaukee, WI1376579417
- Anas Abed, MDMadison, WI1659002566
- Margaret Abel, MDRhinelander, WI1477590487
- Mesfin Abera, M.D.Beaver Dam, WI1972852390
- Vidthya Abraham, M.D.Madison, WI1861836058
- Ismael Abu Limon, MDGreenfield, WI1467945543
- Amjed Abu Muhanna, MDMarinette, WI1861514135
- Satish Achanti, MDAppleton, WI1982711198
Common questions
What is Mary L. Geralts, MD's NPI number?
Mary L. Geralts, MD's National Provider Identifier (NPI) is 1386759397, issued on Aug 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary L. Geralts, MD located?
The NPPES record lists a practice address at 600 Walnut Ridge Dr, Hartland, WI, 53029. Phone: (262) 369-6902. Providers update this record themselves, so call before visiting.
How can I verify Mary L. Geralts, MD's license?
NPPES lists Wisconsin license number 34411, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary L. Geralts, MD prescribe under Medicare Part D?
In 2024, Mary L. Geralts, MD had 5,576 Medicare Part D claims for 508 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.
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.