Sonja Kassuba, MD
Hospice and Palliative Medicine (Internal Medicine) Physician · Oakland, CA
Sonja Kassuba, MD is a hospice and palliative medicine (internal medicine) physician with a practice address in Oakland, California, and NPI 1801844881, issued on May 4, 2006. Check the license (California C51995, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sonja Kassuba
- Credential
- MD
- Primary taxonomy
- Hospice and Palliative Medicine (Internal Medicine) Physician 207RH0002X
- License number
- C51995 CA
Self-reported in NPPES; status is on the state search - Practice location
- 350 Hawthorne Ave RM 2346, Oakland, CA 94609
- Phone
- (510) 869-8373
- Enumerated
- May 4, 2006
- Record last updated
- Oct 22, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (510) 869-8375
- Medicare enrollment
- Enrolled (PECOS I20060315000475); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hospice and palliative medicine (internal medicine) physician records → All 260 in California → Look up another NPI →
Also registered at 350 Hawthorne Ave RM 2346
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Paul Cheung, M.D.Internal Medicine Physician1942647060
- Matthew Dahnke, M.D.Hospitalist Physician1487762092
- James Felt, M.D.Hospitalist Physician1073621157
Verify Sonja Kassuba in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C51995Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average hospice and palliative medicine (internal medicine) physician in 2024
80 Medicare Part D claims for 19 beneficiaries, against an average of 741 among the 1,607 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- East Bay Integrated Care IncPleasant Hill, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sonja Kassuba among 260 hospice and palliative medicine (internal medicine) physician records in California
Sonja Kassuba, MD is one of 260 hospice and palliative medicine (internal medicine) physician records with a practice address in California. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 75% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1988 · median 2010 among the 193 with a school on file
- Record last updated2019 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0002X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospice and Palliative Medicine (Internal Medicine) Physician providers in California
There are 260 hospice and palliative medicine (internal medicine) physician records in California.
All 260 in California → Every provider in Oakland → Hospice and Palliative Medicine (Internal Medicine) Physician nationwide →
The 8 hospice and palliative medicine (internal medicine) physician records with the nearest ZIP codes
- Laura Battle, M.D.Oakland, CA 946091770826869
- Andrew Bosomworth, DOOakland, CA 946091992384549
- Andrea Thach, M.D.Oakland, CA 946091265484240
- Bradley Stuart, M.D.Emeryville, CA 946081972537413
- Laura Cantino, MDOakland, CA 946111811330632
- Spencer ChristensenOakland, CA 946111346650090
- Matthew KwongOakland, CA 946071417318320
- Theodore Slomoff, MD, MSCOakland, CA 946111982138350
Common questions
What is Sonja Kassuba, MD's NPI number?
Sonja Kassuba, MD's National Provider Identifier (NPI) is 1801844881, issued on May 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sonja Kassuba, MD located?
The NPPES record lists a practice address at 350 Hawthorne Ave RM 2346, Oakland, CA, 94609. Phone: (510) 869-8373. Providers update this record themselves, so call before visiting.
How can I verify Sonja Kassuba, MD's license?
NPPES lists California license number C51995, 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.
How much does Sonja Kassuba, MD prescribe under Medicare Part D?
In 2024, Sonja Kassuba, MD had 80 Medicare Part D claims for 19 beneficiaries; the average among hospice and palliative medicine (internal medicine) physician prescribers was 741. Part D covers Medicare prescriptions only.
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.