Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Hilarie Claire Tomasiewicz, MD/PHD

Individual provider Neurological Surgery Physician · NPI 1841557444

Dr. Hilarie Claire Tomasiewicz, MD/PHD practises Neurosurgery in Marietta, Georgia. Qualified in 2012, 14 years ago. Practices with Wellstar Medical Group LLC, a 3,072-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Georgia and New York.

Years since qualifying
14
Licensed in
GA, NY
In the registry since
2012
Specialties on file
2
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Practice location Address checks out

61 Whitcher St NE Ste 3110
Marietta, GA 30060-1179
Phone: (770) 422-2326
Fax: (770) 422-7231
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 1365 Clifton Rd Ne, Atlanta, GA 30322-4870 — (617) 256-4176
  • 1 Gustave L Levy Pl, New York, NY 10029-6504 — (212) 241-2479
  • 525 E 68th St, New York, NY 10065-4870 — (866) 426-7787

Specialties & licences

Neurological Surgery Physician (primary) Taxonomy 207T00000X · Licence 82673 (GA)
Neurological Surgery Physician Taxonomy 207T00000X · Licence 306979 (NY)

Record details

NPI number1841557444
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD/PHD
Sole proprietorNo
NPI enumeratedApril 19, 2012
Last updated in NPPESJuly 11, 2023
Certification dateJuly 11, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEUROSURGERY
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice Wellstar Medical Group Llc — 3072 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations7 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients68
Services billed 160 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Travel and Lodging $1,478 6 payments · travel or lodging paid or reimbursed, such as to attend a conference
Food and Beverage $473 9 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Wellstar Cobb Medical Center Hospital · Austell, GA · listed as Wellstar Cobb Medical Group, LLC
  • Wellstar Douglas Medical Center Hospital · Douglasville, GA · listed as Wellstar Douglasville Medical Center, LLC
  • Wellstar Kennestone Regional Medical Center Hospital · Marietta, GA
  • Wellstar North Fulton Medical Center Hospital · Roswell, GA

Colleagues at Wellstar Medical Group LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3072 clinicians in the practice; 12 are shown here.

Other providers in Marietta