Edward Fairfax Frost, MD
Internal Medicine Physician · Watertown, WI
Edward Fairfax Frost, MD is an internal medicine physician with a practice address in Watertown, Wisconsin, and NPI 1184698227, issued on Feb 15, 2006. Check the license (Wisconsin 52228, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Edward Fairfax Frost
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 52228 WI
Self-reported in NPPES; status is on the state search - Practice location
- 109 Air Park Dr, Watertown, WI 53094
- Phone
- (262) 928-5100
- Enumerated
- Feb 15, 2006
- Record last updated
- Jul 11, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- 02271603 NY
- Medicare enrollment
- Enrolled (PECOS I20081020000630); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1998
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 109 Air Park Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Deirdre Duffy, M.D.Obstetrics & Gynecology Physician1962475426
- Catherine Onsrud, FNPFamily Nurse Practitioner1902981673
- Cherri Schleicher, APNPFamily Nurse Practitioner1851350383
- Jewel Schneider, APNPNurse Practitioner1225579253
Verify Edward Fairfax Frost in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 52228Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% more Medicare Part D claims than the average internal medicine physician in 2024
4,653 Medicare Part D claims for 309 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. 64 claims were for opioids.
Most prescribed
- Atorvastatin Calcium491 claims
- Omeprazole224 claims
- Levothyroxine Sodium192 claims
- Amlodipine Besylate191 claims
- Losartan Potassium151 claims
- Gabapentin145 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
- Prohealth Medical Group IncWatertown, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Edward Fairfax Frost among 2,078 internal medicine physician records in Wisconsin
Edward Fairfax Frost, MD is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 46% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1998 · median 2002 among the 1,098 with a school on file
- Record last updated2012 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in Wisconsin
There are 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Watertown → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Gregory BlommelWest Bend, WI 530951184704546
- Kelly Darmody, M.D.West Bend, WI 530951851616627
- Zoran Gajic, MDWest Bend, WI 530951821172255
- Robert GibsonWest Bend, WI 530951598847329
- Andrew GuminskiWest Bend, WI 530951316029143
- Renee Jahnke, M.D.West Bend, WI 530951770545329
- Nicole KlausmeierWest Bend, WI 530951841372679
- Muhammad Mian, MDWest Bend, WI 530951801903836
Common questions
What is Edward Fairfax Frost, MD's NPI number?
Edward Fairfax Frost, MD's National Provider Identifier (NPI) is 1184698227, issued on Feb 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Edward Fairfax Frost, MD located?
The NPPES record lists a practice address at 109 Air Park Dr, Watertown, WI, 53094. Phone: (262) 928-5100. Providers update this record themselves, so call before visiting.
How can I verify Edward Fairfax Frost, MD's license?
NPPES lists Wisconsin license number 52228, 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 Edward Fairfax Frost, MD prescribe under Medicare Part D?
In 2024, Edward Fairfax Frost, MD had 4,653 Medicare Part D claims for 309 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.