Robert J. Hallock, M.D.
Emergency Medicine Physician · Milwaukee, WI
Robert J. Hallock, M.D. is an emergency medicine physician with a practice address in Milwaukee, Wisconsin, and NPI 1043265804, issued on May 23, 2006. Check the license (Wisconsin 44713-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Robert J. Hallock
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 44713-020 WI
D75037 MD
035105392 IL
26624 WV
Self-reported in NPPES; status is on the state search - Practice location
- 111 E Wisconsin Ave, Milwaukee, WI 53202
- Phone
- (414) 290-6720
- Enumerated
- May 23, 2006
- Record last updated
- May 8, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (414) 290-6755
- Medicaid IDs
- 036105392 IL
34602500 WI - Medicare enrollment
- Enrolled (PECOS I20241025003223); accepts Medicare assignment
- Medical or professional school
- University Of Connecticut School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,464 in Wisconsin → Look up another NPI →
Also registered at 111 E Wisconsin Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Manish Acharya, M.D.Emergency Medicine Physician1437129715
- Ayobami Adelayi, CRNACertified Registered Nurse Anesthetist1477926202
- Hector Aguilera, M.D.Emergency Medicine Physician1174593487
- Glenn Aldinger, M.D.Emergency Medicine Physician1639138381
- Adam Ankrum, D.O.Emergency Medicine Physician1003875303
- Toni Anschutz, N.P.Nurse Practitioner1558511253
Verify Robert J. Hallock in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 44713-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% more Medicare Part D claims than the average emergency medicine physician in 2024
317 Medicare Part D claims for 92 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 11 claims were for opioids.
Most prescribed
- Furosemide19 claims
- Citalopram Hbr18 claims
- Digoxin18 claims
- Famotidine18 claims
- Pravastatin Sodium18 claims
- Quetiapine Fumarate18 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 2 group practices
- Emergency Medicine Services OF TX, PLLCHelotes, TX
- Emergency Medicine Specialists SCOshkosh, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert J. Hallock among 1,464 emergency medicine physician records in Wisconsin
Robert J. Hallock, M.D. is one of 1,464 emergency medicine physician records with a practice address in Wisconsin. 79% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 58% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1999 · median 2011 among the 844 with a school on file
- Record last updated2020 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
358 emergency medicine physician records list a practice address in Milwaukee
They are 358 of the 18,389 NPPES records with a practice address in Milwaukee, and 1,464 emergency medicine physician records in Wisconsin.
All 1,464 in Wisconsin → Every provider in Milwaukee → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Manish Acharya, M.D.Milwaukee, WI 532021437129715
- Hector Aguilera, M.D.Milwaukee, WI 532021174593487
- Glenn Aldinger, M.D.Milwaukee, WI 532021639138381
- Adam Ankrum, D.O.Milwaukee, WI 532021003875303
- Jennifer Augustine, M.D.Milwaukee, WI 532021295795904
- Margaret Barron, M.D.Milwaukee, WI 532021831159482
- Stephanie Boyer, M.D.Milwaukee, WI 532021124081765
- Nathaniel Brackett, M.D.Milwaukee, WI 532021457314429
Common questions
What is Robert J. Hallock, M.D.'s NPI number?
Robert J. Hallock, M.D.'s National Provider Identifier (NPI) is 1043265804, issued on May 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert J. Hallock, M.D. located?
The NPPES record lists a practice address at 111 E Wisconsin Ave, Milwaukee, WI, 53202. Phone: (414) 290-6720. Providers update this record themselves, so call before visiting.
How can I verify Robert J. Hallock, M.D.'s license?
NPPES lists Wisconsin license number 44713-020, 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 Robert J. Hallock, M.D. prescribe under Medicare Part D?
In 2024, Robert J. Hallock, M.D. had 317 Medicare Part D claims for 92 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.