Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Clarissa M McCullar, NP

Individual provider Family Nurse Practitioner · NPI 1689624439

Clarissa M McCullar, NP is a Nurse Practitioner in Oak Ridge, Tennessee. Qualified in 1998, 28 years ago. Practices with Summit Medical Group, PLLC, a 636-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Tennessee.

Years since qualifying
28
Licensed in
TN
In the registry since
2006
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

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Practice location Address checks out

801 Oak Ridge Tpke
Oak Ridge, TN 37830-6916 Not confirmed with CMS for 13 years — call before visiting
Phone: (865) 483-3172
Fax: (865) 483-8689
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 7012 (TN)

Record details

NPI number1689624439
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP
Sole proprietorNo
NPI enumeratedMay 11, 2006
Last updated in NPPESMarch 19, 2013

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 1998 (28 years in practice)
Group practice Summit Medical Group, Pllc — 636 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 patients402
Services billed 3,117 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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.

Food and Beverage $776 52 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.

  • Methodist Medical Center Of Oak Ridge Hospital · Oak Ridge, TN
  • Amedisys Home Health Care Home health agency · Knoxville, TN

Colleagues at Summit Medical Group, PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 636 clinicians in the practice; 12 are shown here.

Other providers in Oak Ridge