KELSEY HARUKO NATSUHARA MD
NPI 1265936413
Internal Medicine - Medical Oncology in San Francisco, CA
About Kelsey Haruko Natsuhara Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KELSEY HARUKO NATSUHARA MD (NPI 1265936413) is an individual medical oncology provider in San Francisco, California, licensed in California (A165347) and active in the NPI registry since March 2018. She is enrolled in Medicare PECOS, maintains a secondary practice location in San Francisco, and is a graduate of Harvard Medical School (2018).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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
Kelsey Haruko Natsuhara 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
3Medicare enrollment records show Kelsey Natsuhara reassigns Medicare billing to 3 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
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 94143 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 19
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
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 Kelsey Natsuhara's NPI number?
The NPI number for Kelsey Natsuhara is 1265936413. It was assigned to this individual provider in the NPPES registry on March 22, 2018.
Where is Kelsey Natsuhara located?
Kelsey Natsuhara practices at 1825 4th St Fl 3, San Francisco, CA 94143. The listed phone number is (415) 353-7070.
What is Kelsey Natsuhara's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Kelsey Natsuhara enrolled in Medicare?
Yes. Kelsey Natsuhara 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 Kelsey Natsuhara's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kelsey Natsuhara reassigns Medicare benefits to 3 organizations: Regents Of The University Of California (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, 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 Kelsey Natsuhara'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 Kelsey Natsuhara was last updated on November 13, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Kelsey Haruko Natsuhara, MD · NPI 1265936413
Medical Oncology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since March 22, 2018.
## Identity
- **NPI:** 1265936413 (Entity type: Individual)
- **Enumerated:** March 22, 2018
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** A165347 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1825 4TH ST FL 3, San Francisco, CA 94143-2350
- **Phone:** (415) 353-7070
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of California (NPI 1235322348, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2018
## Record status
- **NPPES last updated:** November 13, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1265936413) · Data from the CMS NPPES public registry.