Marianne Sommerville, MD
Hospitalist Physician · Berkeley, CA
Marianne Sommerville, MD is a hospitalist physician with a practice address in Berkeley, California, and NPI 1457403818, issued on Jan 17, 2007. Check the license (California G58224, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marianne Sommerville
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- G58224 CA
270429 NY
Self-reported in NPPES; status is on the state search - Practice location
- 2450 Ashby Ave RM 3040, Berkeley, CA 94705
- Phone
- (510) 204-3977
- Enumerated
- Jan 17, 2007
- Record last updated
- Sep 9, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (510) 204-5429
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 2450 Ashby Ave RM 3040
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sonya Jubb, NMWMidwife1467698811
- Michelle Miller, MDHospitalist Physician1326126236
- Diana Nemirovsky, CNMAdvanced Practice Midwife1053695395
- Diane SpeechleyObstetrics & Gynecology Physician1215391750
Verify Marianne Sommerville in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G58224Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 95.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $4.04
2 payments; by number, the most common kind was food and beverage; the largest payer was CashFlow Solutions, LLC. The 7,324 providers of this specialty with any payment received $494.84 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Marianne Sommerville among 3,099 hospitalist physician records in California
Marianne Sommerville, MD is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 27% of them.
- NPI issued2007 · 27% of these records are older, 66% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileNo · 81% of these records are
- Record last updated2020 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Berkeley → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Marina Atala, M.D.Berkeley, CA 947051992722359
- Trissa Baden, MDBerkeley, CA 947051801898283
- Ursula Boynton, M.D.Berkeley, CA 947051083722680
- Valerie Curtis, MDBerkeley, CA 947051013081629
- Cecilia Hernandez, MDBerkeley, CA 947051851493688
- Feeiwen Hsiao, M.D.Berkeley, CA 947051124180302
- Carol Livingston, MDBerkeley, CA 947051306801477
- Michelle Miller, MDBerkeley, CA 947051326126236
Common questions
What is Marianne Sommerville, MD's NPI number?
Marianne Sommerville, MD's National Provider Identifier (NPI) is 1457403818, issued on Jan 17, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Marianne Sommerville, MD located?
The NPPES record lists a practice address at 2450 Ashby Ave RM 3040, Berkeley, CA, 94705. Phone: (510) 204-3977. Providers update this record themselves, so call before visiting.
How can I verify Marianne Sommerville, MD's license?
NPPES lists California license number G58224, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Marianne Sommerville, MD's MIPS final score?
The 2023 MIPS final score is 95.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.