Quick answers
- Does Timothy L. Gieseke accept Medicare assignment?
- Medicare's clinician data says Timothy L. Gieseke may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Timothy L. Gieseke see?
- In 2024, CMS data shows 49 Original Medicare patients and 171 services for Timothy L. Gieseke. This counts Original Medicare only and measures volume, not quality.
- What is Timothy L. Gieseke's NPI number?
- 1992703706. 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 Timothy L. Gieseke, 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 | 49 |
|---|---|
| Services billed to Medicare | 171 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 88 |
Most frequent services
- Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)75 services
- Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)41 services
- Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)24 services
- Nursing facility discharge management, more than 30 minutes (99316)17 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%
- High cholesterol75%
- Arthritis65%
- Chronic kidney disease51%
- Alzheimer's disease or dementia49%
- Heart failure45%
Practice locations
Addresses where Timothy L. Gieseke is enrolled with Medicare (CMS data updated October 2, 2026).
- 4886 Hoen AveSanta Rosa, CA 95405 (707) 843‑0719
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Santa Rosa
Clinicians with the same Medicare primary specialty in Santa Rosa, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Irvine, California College Of Medicine |
| Graduation year | 1976 (50 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1992703706 |
| 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