Sonja Kassuba, MD
NPI 1801844881 · Hospice and Palliative Medicine (Internal Medicine) Physician · Oakland, CA
Enrolled with Medicare as Practitioner - Hospice/Palliative Care · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sonja Kassuba, MD is a Hospice and Palliative Medicine (Internal Medicine) Physician provider in Oakland, CA (NPI 1801844881).
Provider details
- NPI number
- 1801844881
- Entity type
- Individual
- Primary specialty
- Hospice and Palliative Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- C51995 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
26 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Residence Visit for Established Patient With High Level of Medical Decision Making, Per Day, If Using Time, at Least 60 Minutes99350 | 26 | $209 |
Typical Medicare-allowed amounts for these services range $209–$209 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (3)
- 2001 Dwight WayBerkeley, CA 94704-2608Phone: (510) 204-5471Fax: (510) 204-6440
- 2450 Ashby Ave Rm 5505Berkeley, CA 94705-2067Phone: (510) 204-1893Fax: (510) 649-8287
- 2450 Ashby AveRoom 5505Berkeley, CA 94705-2067Phone: (510) 204-1893
Registry dates
- Enumerated
- 2006-05-04
- Last updated
- 2019-10-22
Frequently asked questions
- What is Sonja Kassuba's NPI number?
- Sonja Kassuba's National Provider Identifier (NPI) is 1801844881, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sonja Kassuba's specialty?
- Sonja Kassuba is listed in the NPPES registry with a primary specialty of Hospice and Palliative Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Sonja Kassuba located?
- Sonja Kassuba's practice location on file with NPPES is 350 Hawthorne Ave Rm 2346, Oakland, CA 94609.
- What is Sonja Kassuba's phone number?
- The practice phone number listed in the NPPES registry for Sonja Kassuba is (510) 869-8373.
- Does Sonja Kassuba accept Medicare?
- Sonja Kassuba is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sonja Kassuba's NPI active?
- Yes — Sonja Kassuba's NPI (1801844881) is active in the NPPES registry as of the last update on 2019-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.