DR. JELENA M KAO MD
NPI 1932242062
Internal Medicine - Hematology & Oncology in San Mateo, CA
About Dr. Jelena M Kao Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JELENA M KAO MD (NPI 1932242062) is an individual hematology & oncology provider in San Mateo, California, licensed in California (A83980) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of Stanford University School Of Medicine (2005).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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
Dr. Jelena M Kao 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
5Medicare enrollment records show Jelena Kao reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 2,112 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
Walnut Creek, CA 94597
- Reassigned Medicare billing, California enrollment
- 650 clinicians in this Medicare group
Hilo, HI 96720
- Reassigned Medicare billing, Hawaii enrollment
- 263 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.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94402 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 17
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN MATEO, CA 94402
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 Jelena Kao's NPI number?
The NPI number for Jelena Kao is 1932242062. It was assigned to this individual provider in the NPPES registry on February 15, 2007. The provider is also known as Dr. Jelena Milojevic MD.
Where is Jelena Kao located?
Jelena Kao practices at 218 De Anza Blvd, San Mateo, CA 94402. The listed phone number is (650) 341-9131.
What is Jelena Kao's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Jelena Kao enrolled in Medicare?
Yes. Jelena Kao 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 Jelena Kao's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jelena Kao reassigns Medicare benefits to 5 organizations: Regents Of The University Of California (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA), John Muir Physician Network (Walnut Creek, CA) and Hilo Benioff Medical Center (Hilo, HI). 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 Jelena Kao'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 Jelena Kao was last updated on April 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months 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.
# Dr. Jelena M Kao, MD · NPI 1932242062
Hematology & Oncology physician in San Mateo, California. Individual provider, active in the CMS NPPES registry since February 15, 2007.
## Identity
- **NPI:** 1932242062 (Entity type: Individual)
- **Enumerated:** February 15, 2007
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** A83980 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 218 DE ANZA BLVD, San Mateo, CA 94402-3913
- **Phone:** (650) 341-9131 · **Fax:** (650) 341-9135
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of California (NPI 1376613943, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); John Muir Physician Network (NPI 1841407665, Walnut Creek, CA); Hilo Benioff Medical Center (NPI 1780757856, Hilo, HI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Stanford University School Of Medicine, class of 2005
## Record status
- **NPPES last updated:** April 29, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1932242062) · Data from the CMS NPPES public registry.