Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Internal Medicine

Haixin N. Xu, MD

Works at hospitals in Northridge, CA · West Hills, CA · California

Summary

Dr. Haixin N. Xu, MD is an internal medicine doctor at 7345 Medical Ctr Dr, Suite 220, West Hills, CA 91307. Phone: (818) 888-3123. Accepts Medicare assignment. In 2024, Haixin N. Xu had 409 Original Medicare patients and 3,398 services. NPI 1124019138. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Haixin N. Xu, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Haixin N. Xu accept Medicare assignment?
Yes. Medicare's clinician data says Haixin N. Xu accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Haixin N. Xu see?
In 2024, CMS data shows 409 Original Medicare patients and 3,398 services for Haixin N. Xu. This counts Original Medicare only and measures volume, not quality.
What is Haixin N. Xu's NPI number?
1124019138. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Haixin N. Xu, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients409
Services billed to Medicare3,398
Different services or procedures28
Participating Medicare providerYes
Average age of these patients79

Most frequent services

  1. Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)829 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)635 services
  3. Insertion of needle into vein for collection of blood sample (36415)451 services
  4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)391 services
  5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)323 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol75%
  • Arthritis69%
  • Ischemic heart disease57%
  • Diabetes51%
  • Heart failure28%

Hospitals where Haixin N. Xu works

Medicare's Facility Affiliation Data lists Haixin N. Xu at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Haixin N. Xu is enrolled with Medicare (CMS data updated October 2, 2026).

Specialties

Find other Internal Medicine doctors in California →

Other internal medicine doctors in West Hills

Clinicians with the same Medicare primary specialty in West Hills, CA — not a recommendation.

All internal medicine doctors in West Hills →

Clinician information

CredentialMD
Graduation year1995 (31 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1124019138
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians