DR. SHANNON ANJELICA MARKUS M.D.
NPI 1174057889
Emergency Medicine in Austin, TX
About Dr. Shannon Anjelica Markus M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SHANNON ANJELICA MARKUS M.D. (NPI 1174057889) is an individual emergency medicine provider in Austin, Texas, licensed in Texas (T1456) and active in the NPI registry since April 2017. She is enrolled in Medicare PECOS, is affiliated with Dell Seton Med Center At The University Of Tx, and is a graduate of Perelman School Of Med At The University Of Pennsylvania (2017).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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. Shannon Anjelica Markus 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
10Medicare enrollment records show Shannon Markus reassigns Medicare billing to 10 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
Austin, TX 78750
- Reassigned Medicare billing, Texas enrollment
- 93 clinicians in this Medicare group
Lakeway, TX 78734
- Reassigned Medicare billing, Texas enrollment
- 77 clinicians in this Medicare group
San Marcos, TX 78666
- Reassigned Medicare billing, Texas enrollment
- 137 clinicians in this Medicare group
Killeen, TX 76549
- Reassigned Medicare billing, Texas enrollment
- 387 clinicians in this Medicare group
Killeen, TX 76549
- Reassigned Medicare billing, Texas enrollment
- 214 clinicians in this Medicare group
San Antonio, TX 78229
- Reassigned Medicare billing, Texas enrollment
- 1,452 clinicians in this Medicare group
Lumberton, TX 77657
- Reassigned Medicare billing, Texas enrollment
- 113 clinicians in this Medicare group
Orange, TX 77630
- Reassigned Medicare billing, Texas enrollment
- 115 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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Dell Seton Med Center At The University Of Tx
Acute Care Hospitals · Austin, TXSt David's Medical Center
Acute Care Hospitals · Austin, TXNorth Austin Medical Center
Acute Care Hospitals · Austin, TXAscension Seton Southwest
Acute Care Hospitals · Austin, TXAscension Seton Northwest
Acute Care Hospitals · Austin, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 78701 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 Shannon Markus's NPI number?
The NPI number for Shannon Markus is 1174057889. It was assigned to this individual provider in the NPPES registry on April 19, 2017. The provider is also known as Dr. Shannon Anjelica Markus M.D..
Where is Shannon Markus located?
Shannon Markus practices at 1500 Red River St, Austin, TX 78701. The listed phone number is (512) 324-7010.
What is Shannon Markus's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Shannon Markus enrolled in Medicare?
Yes. Shannon Markus 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 Shannon Markus's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Shannon Markus reassigns Medicare benefits to 10 organizations: Longhorn Emergency Medical Associates PA (Austin, TX), Travis County Emergency Physicians PA (Austin, TX), Austin ER Associates PLLC (Austin, TX), Cec Lakeway Urgent Care Physicians PLLC (Lakeway, TX), Comal Emergency Physicians, PLLC (San Marcos, TX) and 5 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 Shannon Markus's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Shannon Markus accept?
Health plans from Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan, Harbor Health, Oscar Insurance Company and Sendero Health Plans, Local Nonprofit and 1 other insurer list Shannon Markus 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 Shannon Markus affiliated with any hospitals?
According to CMS data, Shannon Markus is affiliated with Dell Seton Med Center At The University Of Tx, St David's Medical Center, North Austin Medical Center, Ascension Seton Southwest and Ascension Seton Northwest.
When was this NPI record last updated?
The NPPES record for Shannon Markus was last updated on November 5, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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. Shannon Anjelica Markus, M.D. · NPI 1174057889
Emergency Medicine physician in Austin, Texas. Individual provider, active in the CMS NPPES registry since April 19, 2017.
## Identity
- **NPI:** 1174057889 (Entity type: Individual)
- **Enumerated:** April 19, 2017
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** T1456 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 1500 RED RIVER ST, Austin, TX 78701-1918
- **Phone:** (512) 324-7010
## 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:** 10 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); Austin ER Associates PLLC (NPI 1376114587, Austin, TX); Cec Lakeway Urgent Care Physicians PLLC (NPI 1285088161, Lakeway, TX); Comal Emergency Physicians, PLLC (NPI 1588438675, San Marcos, TX); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 2017
## Record status
- **NPPES last updated:** November 5, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1174057889) · Data from the CMS NPPES public registry.