Carbon DioxideDietary CarbohydratesLung Diseases
Dr. Timothy Louis Gieseke, MD
NPI1992703706PAC ID4880604768
- Medicare services, 2024
- 157
- Medicare patients, 2024
- 49
- Part D claims, 2024
- 1,011
- Publications
- 1
- Affiliated sites
- 2
- Practice address
- 5555 Montgomery Drive, Santa Rosa, CA 95409
- Practice phone
- Call (707) 538-8400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Spring Lake Village
Skilled Nursing Facility - Part of a CCRC · Santa Rosa, California
Find Dr. Gieseke's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Timothy Louis Gieseke is an internist in Santa Rosa, California
Dr. Gieseke practices at Spring Lake Village in Santa Rosa, California.
Dr. Gieseke's NPI, 1992703706, was assigned on July 14, 2005. Dr. Gieseke graduated from UC Irvine School of Medicine in 1976. Dr. Gieseke holds California license G34398.
NPI and contact details
- NPI
- 1992703706NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4880604768
- NPI enumeration date
- July 14, 2005
- NPI status
- Active
- Practice phone
- (707) 538-8400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 76
- Medical school graduation
- 1976
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Timothy Louis Gieseke practices at Spring Lake Village in Santa Rosa, California
Dr. Gieseke's primary practice is Spring Lake Village, at 5555 Montgomery Drive, Santa Rosa, CA 95409 in Sonoma County. The practice phone is (707) 538-8400.
- Spring Lake Village5555 Montgomery Drive, Santa Rosa, CA 95409 · Sonoma CountyPhone(707) 538-8400
Source: Dmand AI Affiliation Data
Dr. Timothy Louis Gieseke is affiliated with 2 sites of care
Dr. Gieseke's primary practice is Spring Lake Village in Santa Rosa, California. Dmand AI also links Dr. Gieseke to 1 senior living community, named with a free account. Dr. Gieseke's employer is on file too: a skilled nursing facility.
Spring Lake VillagePrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Timothy Louis Gieseke's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gieseke practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Spring Lake Village | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Gieseke practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Timothy Louis Gieseke is one of 16,751 internists in California
Internal medicine is Dr. Gieseke's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Gieseke is board certified in internal medicine by the American Board of Internal Medicine. Dr. Gieseke is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Gieseke
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Timothy Louis Gieseke billed Medicare for 157 services in 2024
CMS data shows 157 Medicare services from Dr. Gieseke across 4 procedure codes in 2024, for 49 Medicare patients. Medicare paid $13,224 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024157
Medicare patients49
Paid by Medicare$13,224
Procedure codes4
Dr. Gieseke compared with the California median for internists, 2024
- Dr. Gieseke
- California median
- Medicare services
- 157vs 36157% below
- Medicare patients
- 49vs 15168% below
- Part D claims
- 566vs 42134% above
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Gieseke's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Gieseke?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gieseke and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Timothy Louis Gieseke treated 49 Medicare patients in 2024, average age 88
CMS counts 49 Medicare patients who saw Dr. Gieseke in 2024. The largest group is 85 and over, with 31 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.67, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Gieseke's median patient age at 86, with 63% women.
Medicare patients, 202449
Average age88
Average risk score1.67
Dr. Gieseke's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Gieseke's Medicare patients by sex, 2024
- Women3469%
- Men1531%
Chronic conditions among Dr. Gieseke's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis65%
- Chronic kidney disease51%
- Alzheimer's and dementia49%
- Atrial fibrillation45%
- Heart failure45%
- Mood disorders43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gieseke's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 86
Patient panel by sex, all payers
- Women63%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Timothy Louis Gieseke wrote 1,011 Medicare Part D claims in 2024
In 2024, Dr. Gieseke wrote 1,011 Medicare Part D claims for 88 patients. 88% of them were for generic drugs. CMS names the drug for 566 of them, across 28 drugs with 11 or more claims each, at $28,001 in total drug cost.
Part D claims, 20241,011
Drugs named by CMS28
Total drug cost$28,001
Part D patients88
Dr. Gieseke's Part D claims by kind of drug, 2024
- Generic894 claims88%
- Brand-name and other117 claims12%
Dr. Gieseke's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Gieseke's Part D claims, 2024
- Opioids2%24 of 1,011 claims
- Antibiotics2%18 of 1,011 claims
- Antipsychotics, patients 65 and over3%31 of 1,011 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
For MedTech and pharma teams
Find internists like Dr. Gieseke by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Timothy Louis Gieseke has 1 publication on record
Dmand AI links 1 paper to Dr. Gieseke.
Papers1
Recent publications by Dr. Gieseke
See who Dr. Gieseke researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gieseke works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Timothy Louis Gieseke graduated from UC Irvine School of Medicine
Dr. Gieseke graduated from UC Irvine School of Medicine in 1976.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. Timothy Louis Gieseke's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Timothy Louis Gieseke
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Timothy Louis Gieseke's NPI number?
Dr. Timothy Louis Gieseke's NPI number is 1992703706. It was assigned on July 14, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Timothy Louis Gieseke?
Dr. Timothy Louis Gieseke is an internist in Santa Rosa, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Timothy Louis Gieseke practice?
Dr. Gieseke practices at 5555 Montgomery Drive, Santa Rosa, CA 95409. Dr. Gieseke's primary practice is Spring Lake Village in Santa Rosa, California. Dmand AI also links Dr. Gieseke to 1 senior living community.
What is Dr. Timothy Louis Gieseke's office phone number?
The practice phone on file for Dr. Gieseke is (707) 538-8400.
What is Dr. Timothy Louis Gieseke's medical license number?
Dr. Gieseke holds California license G34398.
Does Dr. Timothy Louis Gieseke accept Medicare?
Yes. CMS data shows Dr. Gieseke billed Medicare for 157 services in 2024.
How many Medicare patients does Dr. Timothy Louis Gieseke see?
CMS counts 49 Medicare patients who saw Dr. Gieseke in 2024, with an average age of 88.
Is Dr. Timothy Louis Gieseke board certified?
Yes. Dr. Gieseke is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Timothy Louis Gieseke bill to Medicare?
In 2024, Dr. Gieseke's most billed Medicare services were nursing facility care (99308), nursing facility care (99309) and nursing facility care (99306).
Where did Dr. Timothy Louis Gieseke go to medical school?
Dr. Gieseke graduated from UC Irvine School of Medicine in 1976.
Show 3 more questionsShow fewer questions
What drugs does Dr. Timothy Louis Gieseke prescribe most?
In 2024 Medicare Part D data, Dr. Gieseke's most prescribed drugs by claims were Atorvastatin Calcium, Escitalopram Oxalate and Metoprolol Succinate.
How long has Dr. Timothy Louis Gieseke been practicing?
Dr. Gieseke graduated from medical school in 1976, 50 years ago.
Does Dr. Timothy Louis Gieseke do research?
Dmand AI links 1 publication to Dr. Gieseke.
Selling to internal medicine practices?
See internists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card