Dr. Brenna Sommer, DO
- Part D claims, 2024
- 303
- Hospital affiliations
- 1
- Industry payments
- $5,585
- Medical group
- 1
- Insurance carriers
- 1
- Practice address
- 999 San Bernardino Road, Upland, CA 91786
- Practice phone
- Call (909) 985-2811
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Sommer's professional email, personal email and mobile number
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Dr. Brenna Sommer is an OB-GYN in Upland, California
Dr. Sommer practices at San Antonio Regional Hospital in Upland, California, part of San Antonio Regional Hospital.
Dr. Sommer's NPI, 1497266811, was assigned on October 12, 2017. Dr. Sommer graduated from Touro University California - Vallejo in 2016. Dr. Sommer holds California license 20A17037.
- NPI
- 1497266811NPI Registry (opens in a new tab)
- NPI enumeration date
- October 12, 2017
- NPI status
- Active
- Practice phone
- (909) 985-2811
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Brenna Sommer practices at San Antonio Regional Hospital in Upland, California
Dr. Sommer's primary practice is San Antonio Regional Hospital, at 999 San Bernardino Road, Upland, CA 91786 in San Bernardino County. The practice phone is (909) 985-2811.
- San Antonio Regional Hospital999 San Bernardino Road, Upland, CA 91786 · San Bernardino CountyPhone(909) 985-2811
Source: Dmand AI Affiliation Data
Dr. Brenna Sommer is affiliated with 2 sites of care and 1 medical group
Dr. Sommer's primary practice is San Antonio Regional Hospital in Upland, California, part of San Antonio Regional Hospital. The medical group on file is Care for Womens Medical Group. Dmand AI also links Dr. Sommer to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Brenna Sommer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sommer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| San Antonio Regional Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Brenna Sommer is one of 4,642 OB-GYNs in California
Obstetrics and gynecology is Dr. Sommer's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Sommer is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology. Dmand AI has Dr. Sommer's licenses on file in 2 states: California and New Jersey.
Specialties and state licenses
- Obstetrics and gynecology, CaliforniaPrimary
- New Jersey license
OB-GYNs near Dr. Sommer
Counts of OB-GYNs 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. Brenna Sommer's patients have a median age of 36
Across all payers, Dmand AI patient panel data puts Dr. Sommer's median patient age at 36, with 99% women.
Dr. Sommer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 36
Patient panel by sex, all payers
- Women99%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. Brenna Sommer wrote 303 Medicare Part D claims in 2024
In 2024, Dr. Sommer wrote 303 Medicare Part D claims for 112 patients. 97% of them were for generic drugs. CMS names the drug for 227 of them, across 4 drugs with 11 or more claims each, at $12,504 in total drug cost. In 2023, CMS named 106 claims across 3 drugs.
Dr. Sommer's Part D claims by kind of drug, 2024
- Generic293 claims97%
- Brand-name and other10 claims3%
Dr. Sommer'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. Sommer's Part D claims, 2024
- Antibiotics4%11 of 303 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: 1062024: 227114%
Drugs named by CMS: 4 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
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Dr. Brenna Sommer received $5,585 in industry payments from 2019 to 2025
CMS Open Payments shows 95 general payments to Dr. Sommer from 24 drug and device companies from 2019 to 2025. Education make up the largest share, 60% of the total. Intuitive Surgical, Inc. paid the most, $3,560.
General payments to Dr. Sommer by program year, 2019 to 2025
General payments to Dr. Sommer by kind, 2019 to 2025
- Education$3,32560%
- Food and beverage$1,75731%
- Travel and lodging$5049%
Companies that paid Dr. Sommer the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Brenna Sommer graduated from Touro University California - Vallejo
Dr. Sommer graduated from Touro University California - Vallejo in 2016.
- Medical school
- Board certified in obstetrics & gynecology
Source: Dmand AI Professional Profile Data
Dr. Brenna Sommer accepts plans from 1 insurance carrier
Dr. Sommer is in network with 1 carrier, including Aetna. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Aetna
Plan types Dr. Sommer accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Brenna Sommer'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Brenna Sommer
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. Brenna Sommer's NPI number?
Dr. Brenna Sommer's NPI number is 1497266811. It was assigned on October 12, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Brenna Sommer?
Dr. Brenna Sommer is an OB-GYN in Upland, California. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Brenna Sommer practice?
Dr. Sommer practices at 999 San Bernardino Road, Upland, CA 91786. Dr. Sommer's primary practice is San Antonio Regional Hospital in Upland, California, part of San Antonio Regional Hospital. Dmand AI also links Dr. Sommer to 1 group practice or clinic.
What is Dr. Brenna Sommer's office phone number?
The practice phone on file for Dr. Sommer is (909) 985-2811.
What is Dr. Brenna Sommer's medical license number?
Dr. Sommer holds California license 20A17037, one of the licenses on file in 2 states.
Which states has Dr. Brenna Sommer been licensed in?
Dmand AI has state licenses on file for Dr. Sommer in California (2019 to 2027) and New Jersey (2017 to 2021).
Which hospitals is Dr. Brenna Sommer affiliated with?
Dr. Sommer practices at San Antonio Regional Hospital in Upland, California.
What medical group is Dr. Brenna Sommer part of?
Dr. Sommer is linked to Care for Womens Medical Group.
Is Dr. Brenna Sommer board certified?
Yes. Dr. Sommer is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology.
Where did Dr. Brenna Sommer go to medical school?
Dr. Sommer graduated from Touro University California - Vallejo in 2016.
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What drugs does Dr. Brenna Sommer prescribe most?
In 2024 Medicare Part D data, Dr. Sommer's most prescribed drugs by claims were Estradiol, Clobetasol Propionate and Misoprostol.
Has Dr. Brenna Sommer received payments from drug or device companies?
CMS Open Payments shows $5,585 in general payments to Dr. Sommer from 24 companies from 2019 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Brenna Sommer been practicing?
Dr. Sommer graduated from medical school in 2016, 10 years ago.
What insurance does Dr. Brenna Sommer accept?
Dr. Sommer is in network with 1 carrier, including Aetna. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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