David Blumberg, MD
Surgery · Oakland, CA
At a glance
350 30Th St Ste 411, Oakland, CA 94609
Published activity: Colonoscopy · Hernia repair - groin (open). View counts and coverage
NPPES record updated Sep 25, 2019. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
350 30Th St Ste 411Oakland, CA 94609
Additional reported practice locations
2435 W Belvedere AveSuite 42
Baltimore, MD 212155224
Phone: 4106016494
Fax: 4106015835
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 1988
- CMS specialties
- Colorectal Surgery (Proctology) · General Surgery
Practice groups
Reported hospital affiliations
- Montefiore St Luke's Cornwall Newburgh, NY
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
| Procedure category | Published Medicare activity |
|---|---|
| Colonoscopy | 13 |
| Hernia repair - groin (open) | 13 |
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Service-mix comparison is unavailable for this NPI in the imported Medicare service file.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $172.50 |
Reporting companies
| Company | Amount |
|---|---|
| ABBVIE INC. | $105.87 |
| VERTEX PHARMACEUTICALS INCORPORATED | $47.24 |
| OPTINOSE US, INC. | $19.39 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Surgery
- Taxonomy code
- 208600000X
- Enumeration date
- Dec 27, 2006
- Record updated
- Sep 25, 2019
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD
Reported taxonomies and licenses
208600000X
License reported: MD069008L PA
208C00000X
License reported: MD069008L PA
208C00000X
License reported: D0078428 MD
208C00000X
License reported: 605665 CA
208600000X · Primary
License reported: 605665 CA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
350 30Th St Ste 411Oakland, CA 94609
- Phone
- (510) 204-8168
- Fax
- (510) 506-7725
Mailing address
325 DISTEL CIR STE 42LOS ALTOS, CA 940221408
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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