Dr. Timothy A. Dernbach, MD
- Medicare services, 2024
- 488
- Medicare patients, 2024
- 76
- Part D claims, 2024
- 95
- Hospital affiliations
- 1
- Industry payments
- $2,554
- Practice address
- 1233 N 30th St, Billings, MT 59101
- Practice phone
- Call (406) 237-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St Vincent Healthcare
Billings, Montana
Find Dr. Dernbach'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 A. Dernbach is a general surgeon in Billings, Montana
Dr. Dernbach practices at St Vincent Healthcare in Billings, Montana.
Dr. Dernbach's NPI, 1962440800, was assigned on June 3, 2006. Dr. Dernbach graduated from University of Washington School of Medicine in 1972. Dr. Dernbach holds Montana license 4065.
- NPI
- 1962440800NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5092780874
- NPI enumeration date
- June 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (406) 237-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 80
- Medical school graduation
- 1972
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Timothy A. Dernbach practices at St Vincent Healthcare in Billings, Montana
Dr. Dernbach's primary practice is St Vincent Healthcare, at 1233 N 30th St, Billings, MT 59101 in Yellowstone County. The practice phone is (406) 237-7000.
- St Vincent Healthcare1233 N 30th St, Billings, MT 59101 · Yellowstone CountyPhone(406) 237-7000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Timothy A. Dernbach is affiliated with 4 sites of care and 2 medical groups
Dr. Dernbach's primary practice is St Vincent Healthcare in Billings, Montana. Dr. Dernbach is also affiliated with St. Vincent Regional Hospital. The medical group on file is SCL Health Medical Group. Dmand AI also links Dr. Dernbach to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Timothy A. Dernbach's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Dernbach practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St Vincent Healthcare | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Timothy A. Dernbach is one of 111 general surgeons in Montana
Surgery is Dr. Dernbach's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Dernbach is licensed in Montana.
Specialties and state licenses
- Surgery, MontanaPrimary
General surgeons near Dr. Dernbach
Counts of general surgeons 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 A. Dernbach billed Medicare for 488 services in 2024
CMS data shows 488 Medicare services from Dr. Dernbach across 5 procedure codes in 2024, for 76 Medicare patients. Medicare paid $21,210 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Dernbach's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 4122024: 33718%
- Office and hospital visits
- 2023: 1412024: 1308%
- Tests and treatments
- 2023: 972024: 2178%
Dr. Dernbach compared with the Montana median for general surgeons, 2024
- Dr. Dernbach
- Montana median
- Medicare services
- 488vs 1353.6 times
- Medicare patients
- 76vs 12338% below
- Part D claims
- 50vs 4219% above
Medians across 121 general surgeons in Montana with Dmand AI profiles that report each measure.
Dr. Dernbach'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Dernbach and other general surgeons in Montana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Timothy A. Dernbach treated 76 Medicare patients in 2024, average age 72
CMS counts 76 Medicare patients who saw Dr. Dernbach in 2024. The largest group is 65 to 74, with 33 patients. 75% of them have high blood pressure, and 62% have high cholesterol. 22% are also on Medicaid. Their average risk score is 2.97, 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. Dernbach's median patient age at 74, with 47% women.
Dr. Dernbach's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Dernbach's Medicare patients by sex, 2024
- Women2736%
- Men4964%
Chronic conditions among Dr. Dernbach's Medicare patients, 2024
- High blood pressure75%
- High cholesterol62%
- Arthritis61%
- Diabetes49%
- Chronic kidney disease46%
- Depression39%
- Atrial fibrillation37%
- Mood disorders37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Dernbach's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women47%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Timothy A. Dernbach wrote 95 Medicare Part D claims in 2024
In 2024, Dr. Dernbach wrote 95 Medicare Part D claims for 36 patients. 100% of them were for generic drugs. CMS names the drug for 50 of them, across 2 drugs with 11 or more claims each, at $161 in total drug cost. In 2023, CMS named 68 claims across 3 drugs.
Dr. Dernbach'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. Dernbach's Part D claims, 2024
- Antibiotics76%72 of 95 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 682024: 5026%
Drugs named by CMS: 2 in 2024, 3 in 2023.
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
Dr. Timothy A. Dernbach ranks in the 76th percentile for removal of tissue in Medicare
Dr. Dernbach accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 38 procedures of removal of tissue by Dr. Dernbach, more than 76% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Dernbach ranks in Medicare procedure volume
- Removal of tissue
- 76th percentile38 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Timothy A. Dernbach received $2,554 in industry payments from 2016 to 2025
CMS Open Payments shows 57 general payments to Dr. Dernbach from 16 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. Integra LifeSciences Corporation paid the most, $595.
General payments to Dr. Dernbach by program year, 2016 to 2025
General payments to Dr. Dernbach by kind, 2016 to 2025
- Food and beverage$2,44096%
- Travel and lodging$753%
- Entertainment$392%
Companies that paid Dr. Dernbach the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Timothy A. Dernbach graduated from University of Washington School of Medicine
Dr. Dernbach graduated from University of Washington School of Medicine in 1972.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Timothy A. Dernbach'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 A. Dernbach
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 A. Dernbach's NPI number?
Dr. Timothy A. Dernbach's NPI number is 1962440800. It was assigned on June 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Timothy A. Dernbach?
Dr. Timothy A. Dernbach is a general surgeon in Billings, Montana. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Timothy A. Dernbach practice?
Dr. Dernbach practices at 1233 N 30th St, Billings, MT 59101. Dr. Dernbach's primary practice is St Vincent Healthcare in Billings, Montana. Dmand AI also links Dr. Dernbach to 2 group practices and clinics and 1 medical group.
What is Dr. Timothy A. Dernbach's office phone number?
The practice phone on file for Dr. Dernbach is (406) 237-7000.
What is Dr. Timothy A. Dernbach's medical license number?
Dr. Dernbach holds Montana license 4065.
Which hospitals is Dr. Timothy A. Dernbach affiliated with?
Dr. Dernbach is affiliated with St. Vincent Regional Hospital.
What medical group is Dr. Timothy A. Dernbach part of?
Dr. Dernbach is linked to SCL Health Medical Group. Dmand AI links Dr. Dernbach to 1 more medical group.
Does Dr. Timothy A. Dernbach accept Medicare?
Yes. CMS data shows Dr. Dernbach billed Medicare for 488 services in 2024, and Dr. Dernbach accepts Medicare assignment.
How many Medicare patients does Dr. Timothy A. Dernbach see?
CMS counts 76 Medicare patients who saw Dr. Dernbach in 2024, with an average age of 72.
What services does Dr. Timothy A. Dernbach bill to Medicare?
In 2024, Dr. Dernbach's most billed Medicare services were surgery: skin and soft tissue (11042), office visit, established patient (99213) and office visit, established patient (99212).
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Where did Dr. Timothy A. Dernbach go to medical school?
Dr. Dernbach graduated from University of Washington School of Medicine in 1972.
What drugs does Dr. Timothy A. Dernbach prescribe most?
In 2024 Medicare Part D data, Dr. Dernbach's most prescribed drugs by claims were Cephalexin and Sulfamethoxazole-Trimethoprim.
Has Dr. Timothy A. Dernbach received payments from drug or device companies?
CMS Open Payments shows $2,554 in general payments to Dr. Dernbach from 16 companies from 2016 to 2025. The largest total came from Integra LifeSciences Corporation.
How long has Dr. Timothy A. Dernbach been practicing?
Dr. Dernbach graduated from medical school in 1972, 54 years ago.
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