KAREN BLAKE JACOBSON MD
NPI 1396130464
Internal Medicine - Infectious Disease in Stanford, CA
About Karen Blake Jacobson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREN BLAKE JACOBSON MD (NPI 1396130464) is an individual infectious disease provider in Stanford, California, licensed in California (A156611) and active in the NPI registry since April 2015. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Icahn School Of Medicine At Mount Sinai (2015).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Karen Blake Jacobson Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Karen Jacobson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Menlo Park, CA 94025
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1306907928 (California)
- 597 clinicians in this Medicare group
Redwood City, CA 94063
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94305 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Karen Jacobson's NPI number?
The NPI number for Karen Jacobson is 1396130464. It was assigned to this individual provider in the NPPES registry on April 5, 2015.
Where is Karen Jacobson located?
Karen Jacobson practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-4000.
What is Karen Jacobson's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Karen Jacobson enrolled in Medicare?
Yes. Karen Jacobson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Karen Jacobson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Jacobson reassigns Medicare benefits to 2 organizations: County Of San Mateo (Menlo Park, CA) and Permanente Medical Group Inc (Redwood City, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Karen Jacobson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Karen Jacobson was last updated on April 26, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Karen Blake Jacobson, MD · NPI 1396130464
Infectious Disease physician in Stanford, California. Individual provider, active in the CMS NPPES registry since April 5, 2015.
## Identity
- **NPI:** 1396130464 (Entity type: Individual)
- **Enumerated:** April 5, 2015
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** A156611 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 PASTEUR DR, Stanford, CA 94305-2200
- **Phone:** (650) 723-4000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): County Of San Mateo (NPI 1336239052, Menlo Park, CA); Permanente Medical Group Inc (NPI 1639252604, Redwood City, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Icahn School Of Medicine At Mount Sinai, class of 2015
## Record status
- **NPPES last updated:** April 26, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1396130464) · Data from the CMS NPPES public registry.