JILLIAN CAROL GREVENSTUK
NPI 1710646211
Nurse Practitioner - Critical Care Medicine in Round Rock, TX
About Jillian Carol Grevenstuk NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JILLIAN CAROL GREVENSTUK (NPI 1710646211) is an individual critical care medicine provider in Round Rock, Texas, licensed in Texas (1058042) and active in the NPI registry since December 2021. She is enrolled in Medicare PECOS, is affiliated with Ascension Seton Medical Center Austin, and is a graduate of Other (2021).
NPPES Registry Identity
Specialties & Licenses
Group Practice 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
Jillian Carol Grevenstuk 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
2Medicare enrollment records show Jillian Grevenstuk reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Cedar Park, TX 78613
- Reassigned Medicare billing, Texas enrollment
- 104 clinicians in this Medicare group
Austin, TX 78758
- Reassigned Medicare billing, Texas enrollment
- 1,188 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 3
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.
Ascension Seton Medical Center Austin
Acute Care Hospitals · Austin, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 78665 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 Jillian Grevenstuk's NPI number?
The NPI number for Jillian Grevenstuk is 1710646211. It was assigned to this individual provider in the NPPES registry on December 12, 2021.
Where is Jillian Grevenstuk located?
Jillian Grevenstuk practices at 2639 Haselwood Ln, Round Rock, TX 78665. The listed phone number is (806) 252-5668.
What is Jillian Grevenstuk's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Critical Care Medicine, with taxonomy code 363LC0200X.
Is Jillian Grevenstuk enrolled in Medicare?
Yes. Jillian Grevenstuk 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 Jillian Grevenstuk's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jillian Grevenstuk reassigns Medicare benefits to 2 organizations: Usacs Critical Care Medicine Services Of Texas, PLLC (Cedar Park, TX) and Seton Family Of Doctors (Austin, TX). 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 Jillian Grevenstuk's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Jillian Grevenstuk accept?
Health plans from Antidote Health of TX, Blue Cross and Blue Shield of Texas, Harbor Health and UnitedHealthcare list Jillian Grevenstuk 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 Jillian Grevenstuk affiliated with any hospitals?
According to CMS data, Jillian Grevenstuk is affiliated with Ascension Seton Medical Center Austin.
When was this NPI record last updated?
The NPPES record for Jillian Grevenstuk was last updated on January 26, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Jillian Carol Grevenstuk · NPI 1710646211
Critical Care Medicine physician in Round Rock, Texas. Individual provider, active in the CMS NPPES registry since December 12, 2021.
## Identity
- **NPI:** 1710646211 (Entity type: Individual)
- **Enumerated:** December 12, 2021
- **Primary specialty:** Nurse Practitioner - Critical Care Medicine · taxonomy 363LC0200X
- **State license:** 1058042 (Texas)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 2639 HASELWOOD LN, Round Rock, TX 78665-2362
- **Phone:** (806) 252-5668
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Usacs Critical Care Medicine Services Of Texas, PLLC (NPI 1023522554, Cedar Park, TX); Seton Family Of Doctors (NPI 1225644065, Austin, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2021
## Record status
- **NPPES last updated:** January 26, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1710646211) · Data from the CMS NPPES public registry.