Quick answers
- Does Maria N. Tantsits accept Medicare assignment?
- Yes. Medicare's clinician data says Maria N. Tantsits 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 Maria N. Tantsits see?
- In 2024, CMS data shows 41 Original Medicare patients and 61 services for Maria N. Tantsits. This counts Original Medicare only and measures volume, not quality.
- What is Maria N. Tantsits's NPI number?
- 1528683190. 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 Maria N. Tantsits, 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 | 41 |
|---|---|
| Services billed to Medicare | 61 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)24 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)11 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 cholesterol75%
- High blood pressure73%
- Arthritis56%
- Diabetes27%
Practice locations
Addresses where Maria N. Tantsits is enrolled with Medicare (CMS data updated October 2, 2026).
- 12700 Southfork Rd, Suite 235Saint Louis, MO 63128 (314) 729‑9995
- 34 Hampton Village PlzSaint Louis, MO 63109 (314) 752‑2679
- 621 S New Ballas Rd, Suite 5006bSaint Louis, MO 63141 (314) 251‑5300
- 621 S New Ballas Rd, Suite 585aSaint Louis, MO 63141 (314) 251‑6478
- 851 E 5th StWashington, MO 63090 (636) 239‑8345
Group practices
Medicare enrollment lists Maria N. Tantsits as a member of these groups (CMS data updated October 2, 2026).
- Mercy Clinic Ophthalmology LLC15 clinicians in the group
- Mercy Health Services LLC2 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Other clinicians in Mercy Clinic Ophthalmology LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | University Of Missouri St Louis - School Of Optometry |
| Graduation year | 2020 (6 years since optometry school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1528683190 |
| 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