Helmut V. Ammon, M.D.
Gastroenterology Physician · Milwaukee, WI
Helmut V. Ammon, M.D. is a gastroenterology physician with a practice address in Milwaukee, Wisconsin, and NPI 1457387896, issued on Jun 25, 2006. Check the license (Wisconsin 18489, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Helmut V. Ammon
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 18489 WI
Self-reported in NPPES; status is on the state search - Practice location
- 9200 W Wisconsin Ave, Milwaukee, WI 53226
- Phone
- (414) 955-6895
- Enumerated
- Jun 25, 2006
- Record last updated
- Oct 22, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (414) 805-3885
- Medicaid IDs
- 1457387896 WI
30139900 WI - Medicare enrollment
- Enrolled (PECOS I20081118000190); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 340 in Wisconsin → Look up another NPI →
Also registered at 9200 W Wisconsin Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Haisam Abid, MBBSHospitalist Physician1578083184
- Faith Abodunrin, MDHematology & Oncology Physician1437768769
Verify Helmut V. Ammon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 18489Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average gastroenterology physician in 2024
89 Medicare Part D claims for 29 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 31% of claims.
Most prescribed
- Cholestyramine13 claims
- Lidocaine Hcl Viscous13 claims
- Linzess13 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 80.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- The Medical College OF Wisconsin IncMilwaukee, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Helmut V. Ammon among 340 gastroenterology physician records in Wisconsin
Helmut V. Ammon, M.D. is one of 340 gastroenterology physician records with a practice address in Wisconsin. 83% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 44% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1963 · median 2003 among the 239 with a school on file
- Record last updated2012 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Wisconsin
There are 340 gastroenterology physician records in Wisconsin.
All 340 in Wisconsin → Every provider in Milwaukee → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- John Bjork, M.D.Milwaukee, WI 532261538121512
- James Cunningham, MDWauwatosa, WI 532261225005689
- Kulwinder Dua, MDMilwaukee, WI 532261215988290
- Jose Franco, MDMilwaukee, WI 532261699726547
- Mary Catherine Gerleman, MDWauwatosa, WI 532261134191877
- George Johnson, MDMilwaukee, WI 532261821049677
- Benson Massey, MDMilwaukee, WI 532261407807258
- Robert Molloy, MDWauwatosa, WI 532261043287717
Common questions
What is Helmut V. Ammon, M.D.'s NPI number?
Helmut V. Ammon, M.D.'s National Provider Identifier (NPI) is 1457387896, issued on Jun 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Helmut V. Ammon, M.D. located?
The NPPES record lists a practice address at 9200 W Wisconsin Ave, Milwaukee, WI, 53226. Phone: (414) 955-6895. Providers update this record themselves, so call before visiting.
How can I verify Helmut V. Ammon, M.D.'s license?
NPPES lists Wisconsin license number 18489, 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 Helmut V. Ammon, M.D. prescribe under Medicare Part D?
In 2024, Helmut V. Ammon, M.D. had 89 Medicare Part D claims for 29 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Helmut V. Ammon, M.D.'s MIPS final score?
The 2023 MIPS final score is 80.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.