Timothy Gieseke, M.D.
NPI 1992703706 · Internal Medicine Physician · Santa Rosa, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Gieseke, M.D. is a Internal Medicine Physician provider in Santa Rosa, CA (NPI 1992703706).
Provider details
- NPI number
- 1992703706
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G34398 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
157 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 75 | $75 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 41 | $108 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 | 24 | $181 |
| Nursing Facility Discharge Management, More Than 30 Minutes99316 | 17 | $130 |
Typical Medicare-allowed amounts for these services range $75–$181 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 62 | 16 |
| Escitalopram Oxalate | 35 | — |
| Metoprolol Succinate | 34 | — |
| Alendronate Sodium | 29 | — |
| Donepezil Hcl | 24 | — |
| Amlodipine Besylate | 22 | — |
| Spironolactone | 22 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-14
- Last updated
- 2012-02-07
Frequently asked questions
- What is Timothy Gieseke's NPI number?
- Timothy Gieseke's National Provider Identifier (NPI) is 1992703706, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Gieseke's specialty?
- Timothy Gieseke is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Gieseke located?
- Timothy Gieseke's practice location on file with NPPES is 3536 Mendocino Ave, Santa Rosa, CA 95403-3634.
- What is Timothy Gieseke's phone number?
- The practice phone number listed in the NPPES registry for Timothy Gieseke is (707) 546-2180.
- Does Timothy Gieseke accept Medicare?
- Timothy Gieseke is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Gieseke's NPI active?
- Yes — Timothy Gieseke's NPI (1992703706) is active in the NPPES registry as of the last update on 2012-02-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.