ROBERT J HALLOCK M.D.
NPI 1043265804
Emergency Medicine in Milwaukee, WI
About Robert J Hallock M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ROBERT J HALLOCK M.D. (NPI 1043265804) is an individual emergency medicine provider in Milwaukee, Wisconsin, licensed in Maryland (D75037) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Methodist Hospital, and maintains 6 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 6
Other Identifiers 5
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Robert J Hallock M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
8Medicare enrollment records show Robert Hallock reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Milwaukee, WI 53226
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Emergency Medicine Specialists Sc
- 244 clinicians in this Medicare group
Pleasant Prairie, WI 53158
- Reassigned Medicare billing, Wisconsin enrollment
- 104 clinicians in this Medicare group
Manitowoc, WI 54220
- Reassigned Medicare billing, Wisconsin enrollment
- 350 clinicians in this Medicare group
Madison, WI 53715
- Reassigned Medicare billing, Wisconsin enrollment
- 103 clinicians in this Medicare group
Frostburg, MD 21532
- Reassigned Medicare billing, Maryland enrollment
- 210 clinicians in this Medicare group
Cumberland, MD 21502
- Reassigned Medicare billing, Maryland enrollment
- 96 clinicians in this Medicare group
Rockville, MD 20850
- Reassigned Medicare billing, Maryland enrollment
- 301 clinicians in this Medicare group
San Antonio, TX 78229
- Reassigned Medicare billing, Texas enrollment
- 1,452 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Methodist Hospital
Acute Care Hospitals · San Antonio, TXAscension NE Wisconsin - St Elizabeth Campus
Acute Care Hospitals · Appleton, WIMethodist Hospital Stone Oak
Acute Care Hospitals · San Antonio, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53202 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Robert Hallock's NPI number?
The NPI number for Robert Hallock is 1043265804. It was assigned to this individual provider in the NPPES registry on May 23, 2006.
Where is Robert Hallock located?
Robert Hallock practices at 111 E Wisconsin Ave Suite 2000, Milwaukee, WI 53202. The listed phone number is (414) 290-6720.
What is Robert Hallock's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Robert Hallock enrolled in Medicare?
Yes. Robert Hallock is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Robert Hallock's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Robert Hallock reassigns Medicare benefits to 8 organizations: Emergency Medicine Specialists, S.C. (Milwaukee, WI), Vituity-Wisconsin Em Sc (Pleasant Prairie, WI), Froedtert Manitowoc Medical Group, LLC (Manitowoc, WI), Madison Emergency Physicians, Sc (Madison, WI), Upmc Western Maryland Corporation (Frostburg, MD) and 3 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Robert Hallock's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Robert Hallock accept?
Health plans from Blue Cross and Blue Shield of Texas, CareSource (Common Ground Healthcare), Oscar Insurance Company and UnitedHealthcare list Robert Hallock as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Robert Hallock affiliated with any hospitals?
According to CMS data, Robert Hallock is affiliated with Methodist Hospital, Ascension NE Wisconsin - St Elizabeth Campus and Methodist Hospital Stone Oak.
When was this NPI record last updated?
The NPPES record for Robert Hallock was last updated on May 8, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Robert J Hallock, M.D. · NPI 1043265804
Emergency Medicine physician in Milwaukee, Wisconsin. Individual provider, active in the CMS NPPES registry since May 23, 2006.
## Identity
- **NPI:** 1043265804 (Entity type: Individual)
- **Enumerated:** May 23, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** D75037 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 111 E WISCONSIN AVE, SUITE 2000, Milwaukee, WI 53202-4815
- **Phone:** (414) 290-6720 · **Fax:** (414) 290-6755
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 8 organizations under Medicare reassignment (form CMS-855R): Emergency Medicine Specialists, S.C. (NPI 1568413524, Milwaukee, WI); Vituity-Wisconsin Em Sc (NPI 1326730664, Pleasant Prairie, WI); Froedtert Manitowoc Medical Group, LLC (NPI 1437829975, Manitowoc, WI); Madison Emergency Physicians, Sc (NPI 1588646095, Madison, WI); Upmc Western Maryland Corporation (NPI 1952495079, Frostburg, MD); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Connecticut School Of Medicine, class of 1999
## Record status
- **NPPES last updated:** May 8, 2020
- **Other identifiers:** Other 930118424 (IL); Other P00012889 (WI); Medicaid 036105392 (IL); and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1043265804) · Data from the CMS NPPES public registry.