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KUN XIAO MD MPH
NPI 1710326889
Internal Medicine - Hematology & Oncology in Castro Valley, CA

Active since June 21, 2013PECOS EnrolledAccepts Medicare Assignment
20130 LAKE CHABOT RD STE 307, CASTRO VALLEY, CA 94546(510) 204-8383(510) 506-7729 Get Directions Write a Review

NPPES record last updated: July 22, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 22, 2026, Jul 16, 2026, Jan 23, 2026 and 4 more (7 updates tracked since 2016).

About Kun Xiao Md Mph NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KUN XIAO MD MPH (NPI 1710326889) is an individual hematology & oncology provider in Castro Valley, California, licensed in California (C203998) and active in the NPI registry since June 2013. He is enrolled in Medicare PECOS, is affiliated with Aurora Health Care Central Inc, and is a graduate of Other (2010).

NPPES Registry Identity

NPI1710326889
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameKUN XIAOCredential: MD MPH
Location Address20130 LAKE CHABOT RD STE 307Castro Valley, CA 94546-5340
Mailing Address20130 Lake Chabot Rd Ste 307Castro Valley, CA 94546-5340 · (510) 204-8383
Phone(510) 204-8383
Fax(510) 506-7729
Sole ProprietorNo
Medical School CMSOtherGraduated 2010
Enumeration DateJune 21, 2013
Last NPPES UpdateJuly 22, 20267 updates tracked since enumeration
NPPES CertifiedJuly 22, 2026
✔ NPI 1710326889 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
Licenses✔ Licensed in CA · C203998✔ Licensed in WI · 70244
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
20130 LAKE CHABOT RD STE 307, Castro Valley, CA 94546
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Aspirus Health Plan, CareSource (Common Ground Healthcare).Insurance ›

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

Kun Xiao Md Mph 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.

PECOS PAC ID4183904154
PECOS Enrollment IDI20190624000718, I20260114001185
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Kun Xiao reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Sutter Bay Medical Foundation
13 mi
Multi-Specialty
12 CAMINO ENCINAS
Orinda, CA 94563
  • Reassigned Medicare billing, California enrollment
  • 4,479 clinicians in this Medicare group
NPI 1366898538 (510) 204-8180
Aurora Health Care Central, Inc.
1,836 mi
General Acute Care Hospital
3400 UNION AVE
Sheboygan, WI 53081
  • Reassigned Medicare billing, Wisconsin enrollment
  • 34 clinicians in this Medicare group
NPI 1922053107 (920) 802-2100

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 5

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.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
439 services116 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
283 services168 patients
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or G2212
This service refers to extended doctor visits where your healthcare provider spends additional time evaluating and managing your health beyond the primary procedure's required time. This includes each extra 15 minutes spent by the physician on the same day as the primary service.
40 services21 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
36 services36 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
23 services19 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Aurora Health Care Central Inc

Acute Care Hospitals · Sheboygan, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520035
Location3400 Union AveSheboygan, WI 53081 · Sheboygan County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94546 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Capecitabine, oral, 500 mg J8521
Treatment-Treatment - Miscellaneous · category RX029N
1 supplier13 claims1,092 services$0.67 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
1 supplier12 claims12 services$17.35 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

NITIN TANDAN
Internal Medicine (Cardiovascular Disease)
20130 LAKE CHABOT RD STE 307
CASTRO VALLEY, CA 94546
Alameda County (510) 204-8383

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 Kun Xiao's NPI number?

The NPI number for Kun Xiao is 1710326889. It was assigned to this individual provider in the NPPES registry on June 21, 2013.

Where is Kun Xiao located?

Kun Xiao practices at 20130 Lake Chabot Rd Ste 307, Castro Valley, CA 94546. The listed phone number is (510) 204-8383.

What is Kun Xiao's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Kun Xiao enrolled in Medicare?

Yes. Kun Xiao 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 Kun Xiao's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kun Xiao reassigns Medicare benefits to 2 organizations: Sutter Bay Medical Foundation (Orinda, CA) and Aurora Health Care Central, Inc. (Sheboygan, WI). 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 Kun Xiao's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Kun Xiao accept?

Health plans from Aspirus Health Plan and CareSource (Common Ground Healthcare) list Kun Xiao as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Kun Xiao affiliated with any hospitals?

According to CMS data, Kun Xiao is affiliated with Aurora Health Care Central Inc.

When was this NPI record last updated?

The NPPES record for Kun Xiao was last updated on July 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.