James Stephen Allen, D.O.
Internal Medicine · San Ramon, CA
At a glance
6001 Bollinger Canyon Rd, San Ramon, CA 94583-7170
NPPES record updated Mar 17, 2026. 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
6001 Bollinger Canyon Rd Chevron Singapore-OrchardSan Ramon, CA 94583-7170
Additional reported practice locations
1813 Sumner AveAberdeen, WA 985204600
Phone: 3605381293
Fax: 3605383908
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 1983
- CMS specialties
- Internal Medicine
Practice groups
Reported hospital affiliations
- Grays Harbor Community Hospital Aberdeen, WA
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.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
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
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
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
- Internal Medicine
- Taxonomy code
- 207R00000X
- Enumeration date
- Aug 27, 2007
- Record updated
- Mar 17, 2026
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- D.O.
Reported taxonomies and licenses
207R00000X
License reported: OP61072641 WA
207R00000X · Primary
License reported: 159380-1 NY
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
6001 Bollinger Canyon RdChevron Singapore-Orchard
San Ramon, CA 94583-7170
- Phone
- (925) 842-3224
- Fax
- (925) 842-3242
Mailing address
6001 BOLLINGER CANYON RDSAN RAMON, CA 945832324
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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