Antineoplastic AgentsAromatase InhibitorsBreast Neoplasms
Dr. Louis Fehrenbacher, MD
NPI1942388764
- Part D claims, 2017
- 32
- Publications
- 90
- Clinical trials
- 45
- Industry payments
- $47,142
- State license
- 1
- Practice address
- 975 Sereno Dr, Vallejo, CA 94589-2441
- Practice phone
- Call (707) 651-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Fehrenbacher's professional email, personal email and mobile number
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Dr. Louis Fehrenbacher is a hematologist and oncologist in Vallejo, California
Dr. Fehrenbacher practices in Vallejo, California.
Dr. Fehrenbacher's NPI, 1942388764, was assigned on November 1, 2006. Dr. Fehrenbacher graduated from David Geffen School of Medicine at UCLA in 1973. Dr. Fehrenbacher's California license number on file is A26052.
NPI and contact details
- NPI
- 1942388764NPI Registry (opens in a new tab)
- NPI enumeration date
- November 1, 2006
- NPI status
- Active
- Practice phone
- (707) 651-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Medical school graduation
- 1973
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Louis Fehrenbacher's practice address is in Vallejo, California
Dr. Fehrenbacher's practice address in the NPI Registry is 975 Sereno Dr, Vallejo, CA 94589-2441. The practice phone is (707) 651-1000.
- NPI Registry address975 Sereno Dr, Vallejo, CA 94589-2441Phone(707) 651-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Louis Fehrenbacher's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fehrenbacher practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Fehrenbacher's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Louis Fehrenbacher is one of 1,502 hematologists and oncologists in California
Hematology and oncology is Dr. Fehrenbacher's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Fehrenbacher has a license on file in California.
Specialties and state licenses
- Hematology and oncology, CaliforniaPrimary
Hematologists and oncologists near Dr. Fehrenbacher
Counts of hematologists and oncologists 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. Louis Fehrenbacher wrote 32 Medicare Part D claims in 2017
In 2017, Dr. Fehrenbacher wrote 32 Medicare Part D claims. They cover 2 drugs, with $104,073 in total drug cost. In 2016, CMS named 224 claims across 11 drugs.
Part D claims, 201732
Drugs named by CMS2
Total drug cost$104,073
Dr. Fehrenbacher's most prescribed drugs by claims, 2017
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 2242017: 3286%
Drugs named by CMS: 2 in 2017, 11 in 2016.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Louis Fehrenbacher has 90 publications on record
Dmand AI links 90 papers to Dr. Fehrenbacher, published from 2005 to 2024. 2018 was the busiest year, with 8. The most frequent topics are Breast Neoplasms, Antineoplastic Combined Chemotherapy Protocols and Chemotherapy, Adjuvant. Dr. Fehrenbacher has published most often in J Clin Oncol. Dr. Fehrenbacher's most frequent co-authors are Eleftherios P. Mamounas, MD, Charles E. Geyer, MD and Norman Wolmark, MD.
Papers90
Years published2005 to 2024
Dr. Fehrenbacher's papers by year, 2015 to 2024
Topics Dr. Fehrenbacher writes about most
- Breast Neoplasms
- Antineoplastic Combined Chemotherapy Protocols
- Chemotherapy, Adjuvant
- Antibodies, Monoclonal, Humanized
- Receptor, ErbB-2
- Antibodies, Monoclonal
- Fluorouracil
- Bevacizumab
Dr. Fehrenbacher's most frequent co-authors
- Eleftherios P. Mamounas, MD29 shared papers
- Charles E. Geyer, MD15 shared papers
- Norman Wolmark, MD15 shared papers
Recent publications by Dr. Fehrenbacher
AnthracyclinesAntineoplastic Combined Chemotherapy ProtocolsBreast Neoplasms
Ado-Trastuzumab EmtansineAnthracyclinesAntibiotics, Antineoplastic
Administration, OralBone Density Conservation AgentsBreast Neoplasms
See who Dr. Fehrenbacher researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Fehrenbacher works with, so you can find a warm path to the right hematologists and oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Louis Fehrenbacher has worked on 45 clinical trials
Dmand AI links Dr. Fehrenbacher to 45 clinical trials, 32 of them phase 3 studies. 14 are still active or recruiting. Conditions studied include Breast Neoplasms, Breast Diseases and Carcinoma, Intraductal, Noninfiltrating. National Cancer Institute (NCI) sponsors the most, 14.
Clinical trials with Dr. Fehrenbacher by phase
- NonePhase 1: no trials
- 1Phase 1/2: 1 trial
- 6Phase 2: 6 trials
- 1Phase 2/3: 1 trial
- 32Phase 3: 32 trials
- NonePhase 4: no trials
Conditions in Dr. Fehrenbacher's trials
- Breast Neoplasms
- Breast Diseases
- Carcinoma, Intraductal, Noninfiltrating
- Breast Carcinoma In Situ
- Adenocarcinoma of Lung
Investigators on the most trials with Dr. Fehrenbacher
- Preston D. Steen, MD21 shared trials
- Bruce J. Averbook, MD17 shared trials
- Gilbert D. A. Padula, MD14 shared trials
Recent clinical trials with Dr. Fehrenbacher
Simplified Patient Care Strategy in Decreasing Early Death in Patients With Acute Promyelocytic Leukemia (opens in a new tab)
Active, not recruiting
Leukemia, Promyelocytic, AcuteLeukemia, Myeloid, Acute
Lung-MAP: Nivolumab With or Without Ipilimumab as Second-Line Therapy in Treating Patients With Recurrent Stage IV Squamous Cell Lung Cancer and No Matching Biomarkers (opens in a new tab)
Active, not recruitingPhase 3
IpilimumabNivolumab
Doxorubicin Hydrochloride and Cyclophosphamide Followed by Paclitaxel With or Without Carboplatin in Treating Patients With Triple-Negative Breast Cancer (opens in a new tab)
Active, not recruitingPhase 3
Triple Negative Breast NeoplasmsBreast NeoplasmsCarboplatinCyclophosphamideDoxorubicin Hydrochloride
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Louis Fehrenbacher received $47,142 in industry payments from 2016 to 2019
CMS Open Payments shows 50 general payments to Dr. Fehrenbacher from 4 drug and device companies from 2016 to 2019. Speaker and faculty fees make up the largest share, 85% of the total. Genentech, Inc. paid the most, $26,334. It also lists 3 research payments totaling $3,495 in 2021.
General payments to Dr. Fehrenbacher by program year, 2016 to 2019
General payments to Dr. Fehrenbacher by kind, 2016 to 2019
$47.1Kin total
- Speaker and faculty fees$40,05185%
- Consulting fees$6,64514%
- Food and beverage$4461%
Companies that paid Dr. Fehrenbacher the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Louis Fehrenbacher graduated from David Geffen School of Medicine at UCLA
Dr. Fehrenbacher graduated from David Geffen School of Medicine at UCLA in 1973. Dr. Fehrenbacher is a member of ASCO.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Louis Fehrenbacher'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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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 |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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. Louis Fehrenbacher
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. Louis Fehrenbacher's NPI number?
Dr. Louis Fehrenbacher's NPI number is 1942388764. It was assigned on November 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Louis Fehrenbacher?
Dr. Louis Fehrenbacher is a hematologist and oncologist in Vallejo, California. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Louis Fehrenbacher practice?
Dr. Fehrenbacher practices at 975 Sereno Dr, Vallejo, CA 94589-2441.
What is Dr. Louis Fehrenbacher's office phone number?
The practice phone on file for Dr. Fehrenbacher is (707) 651-1000.
What is Dr. Louis Fehrenbacher's medical license number?
Dr. Fehrenbacher's California license number on file is A26052.
Where did Dr. Louis Fehrenbacher go to medical school?
Dr. Fehrenbacher graduated from David Geffen School of Medicine at UCLA in 1973.
What drugs does Dr. Louis Fehrenbacher prescribe most?
In 2017 Medicare Part D data, Dr. Fehrenbacher's most prescribed drugs by claims were Anastrozole and Zytiga.
Has Dr. Louis Fehrenbacher received payments from drug or device companies?
CMS Open Payments shows $47,142 in general payments to Dr. Fehrenbacher from 4 companies from 2016 to 2019. The largest total came from Genentech, Inc.
How long has Dr. Louis Fehrenbacher been practicing?
Dr. Fehrenbacher graduated from medical school in 1973, 53 years ago.
Does Dr. Louis Fehrenbacher do research?
Dmand AI links 90 publications to Dr. Fehrenbacher, published from 2005 to 2024. Dr. Fehrenbacher has worked on 45 clinical trials.
Who does Dr. Louis Fehrenbacher publish with?
Dr. Fehrenbacher's most frequent co-authors are Eleftherios P. Mamounas, MD (29 shared papers), Charles E. Geyer, MD (15 shared papers) and Norman Wolmark, MD (15 shared papers).
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