Quick answers
- Does Mary L. Gilliland accept Medicare assignment?
- Yes. Medicare's clinician data says Mary L. Gilliland accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Mary L. Gilliland see?
- In 2024, CMS data shows 254 Original Medicare patients and 3,203 services for Mary L. Gilliland. This counts Original Medicare only and measures volume, not quality.
- What is Mary L. Gilliland's NPI number?
- 1700273828. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Mary L. Gilliland, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 254 |
|---|---|
| Services billed to Medicare | 3,203 |
| Different services or procedures | 54 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)731 services
- Testing for presence of drug, by chemistry analyzers (80307)269 services
- Drug test(s), definitive, utilizing (1) drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including, but not limited to gc/ms (any type, single or tandem) and lc/ms (G0482)167 services
- Insertion of needle into vein for collection of blood sample (36415)135 services
- Blood test, comprehensive group of blood chemicals (80053)134 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- Arthritis75%
- High cholesterol74%
- Depression44%
- Anxiety43%
- Ischemic heart disease34%
Practice locations
Addresses where Mary L. Gilliland is enrolled with Medicare (CMS data updated October 2, 2026).
- 2000 Stein DrChattanooga, TN 37421
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Chattanooga
Clinicians with the same Medicare primary specialty in Chattanooga, TN — not a recommendation.
Clinician information
| Graduation year | 2014 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1700273828 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians