Quick answers
- Does Andrew S. Grivas Jr. accept Medicare assignment?
- Medicare's clinician data says Andrew S. Grivas Jr. may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Andrew S. Grivas Jr. see?
- In 2024, CMS data shows 32 Original Medicare patients and 56 services for Andrew S. Grivas Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Andrew S. Grivas Jr.'s NPI number?
- 1285658815. 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 Andrew S. Grivas Jr., 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 | 32 |
|---|---|
| Services billed to Medicare | 56 |
| Different services or procedures | 4 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)30 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)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 blood pressure44%
- Arthritis44%
- High cholesterol34%
Hospitals where Andrew S. Grivas Jr. works
Medicare's Facility Affiliation Data lists Andrew S. Grivas Jr. at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Missouri Baptist Sullivan HospitalSullivan, MO · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 261337
Practice locations
Addresses where Andrew S. Grivas Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 1406 Missouri Blvd, Suite 1Jefferson City, MO 65109 (855) 976‑1888
- 435 Life Style LnWildwood, GA 30757 (706) 820‑1493
Group practices
Medicare enrollment lists Andrew S. Grivas Jr. as a member of this group (CMS data updated October 2, 2026).
- Wildwood Sanitarium Incorporated2 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Jefferson City
Clinicians with the same Medicare primary specialty in Jefferson City, MO — not a recommendation.
Other clinicians in Wildwood Sanitarium Incorporated
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Southwestern Medical School At Dallas |
| Graduation year | 1972 (54 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1285658815 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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