DR. MICHAEL P ZIMMERMAN M.D.
NPI 1518909647
Emergency Medicine in Austin, TX
About Dr. Michael P Zimmerman M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL P ZIMMERMAN M.D. (NPI 1518909647) is an individual emergency medicine provider in Austin, Texas, licensed in Texas (P5765) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Round Rock Medical Center, and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (1999).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
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
Dr. Michael P Zimmerman 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
12Medicare enrollment records show Michael Zimmerman reassigns Medicare billing to 12 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Austin, TX 78705
- Reassigned Medicare billing, Texas enrollment
- 547 clinicians in this Medicare group
Austin, TX 78705
- Reassigned Medicare billing, Texas enrollment
- 1,511 clinicians in this Medicare group
Gainesville, TX 76240
- Reassigned Medicare billing, Texas enrollment
- 1,193 clinicians in this Medicare group
Columbus, WI 53925
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Beaver Dam Community Hospitals Inc.
- 1,447 clinicians in this Medicare group
Menomonee Falls, WI 53051
- Reassigned Medicare billing, Wisconsin enrollment
- 2,294 clinicians in this Medicare group
Eau Claire, WI 54701
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1952890873 (Wisconsin)
- 2,476 clinicians in this Medicare group
Neillsville, WI 54456
- Reassigned Medicare billing, Wisconsin enrollment
- 1,440 clinicians in this Medicare group
Marshfield, WI 54449
- Reassigned Medicare billing, Wisconsin enrollment
- 2,540 clinicians in this Medicare group
Chetek, WI 54728
- Reassigned Medicare billing, Wisconsin enrollment
- 1,616 clinicians in this Medicare group
Manitowoc, WI 54220
- Reassigned Medicare billing, Wisconsin enrollment
- 350 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 2
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Round Rock Medical Center
Acute Care Hospitals · Round Rock, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 78752 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 9
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 Michael Zimmerman's NPI number?
The NPI number for Michael Zimmerman is 1518909647. It was assigned to this individual provider in the NPPES registry on June 12, 2006.
Where is Michael Zimmerman located?
Michael Zimmerman practices at 6300 La Calma Dr Ste 200, Austin, TX 78752. The listed phone number is (512) 452-8533.
What is Michael Zimmerman's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Michael Zimmerman enrolled in Medicare?
Yes. Michael Zimmerman 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 Michael Zimmerman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Zimmerman reassigns Medicare benefits to 12 organizations: Longhorn Emergency Medical Associates PA (Austin, TX), Travis County Emergency Physicians PA (Austin, TX), Acs Primary Care Physicians Southwest, PA (Gainesville, TX), Beaver Dam Community Hosptials Inc (Columbus, WI), Froedtert & the Medical College Of Wisconsin Community Physicians, Inc. (Menomonee Falls, WI) and 7 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 Michael Zimmerman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Zimmerman accept?
Health plans from Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, Molina Healthcare and Sendero Health Plans, Local Nonprofit list Michael Zimmerman 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 Michael Zimmerman affiliated with any hospitals?
According to CMS data, Michael Zimmerman is affiliated with Round Rock Medical Center.
When was this NPI record last updated?
The NPPES record for Michael Zimmerman was last updated on November 17, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. Michael P Zimmerman, M.D. · NPI 1518909647
Emergency Medicine physician in Austin, Texas. Individual provider, active in the CMS NPPES registry since June 12, 2006.
## Identity
- **NPI:** 1518909647 (Entity type: Individual)
- **Enumerated:** June 12, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** P5765 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 6300 LA CALMA DR STE 200, Austin, TX 78752-3825
- **Phone:** (512) 452-8533 · **Fax:** (512) 685-0612
## 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:** 12 organizations under Medicare reassignment (form CMS-855R): Longhorn Emergency Medical Associates PA (NPI 1649669672, Austin, TX); Travis County Emergency Physicians PA (NPI 1962440933, Austin, TX); Acs Primary Care Physicians Southwest, PA (NPI 1538101019, Gainesville, TX); Beaver Dam Community Hosptials Inc (NPI 1275833659, Columbus, WI); Froedtert & the Medical College Of Wisconsin Community Physicians, Inc. (NPI 1568787448, Menomonee Falls, WI); and 7 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Loyola University Of Chicago, Stritch School Of Medicine, class of 1999
## Record status
- **NPPES last updated:** November 17, 2022
- **Other identifiers:** Other P00030482 (WI); Medicaid 34382800 (WI); Other 930123623 (IL); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1518909647) · Data from the CMS NPPES public registry.