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

Family Practice

Lesley Xiong, MD

Works at hospitals in Merced, CA · California

Summary

Dr. Lesley Xiong, MD is a family doctor at 374 W Olive Ave B, Mfa Lifetime Healthcare, Merced, CA 95348. Phone: (209) 383-3076. Accepts Medicare assignment. In 2024, Lesley Xiong had 232 Original Medicare patients and 1,505 services. NPI 1871723858. 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.

  • Specialty: Family doctor (Medicare lists Family Practice)
  • Address: 374 W Olive Ave B, Mfa Lifetime Healthcare, Merced, CA 95348 · Directions (1 more location)
  • Phone: (209) 383‑3076
  • Medicare: Accepts Medicare assignment
  • Hospital: Mercy Medical Center
  • Group practice: Merced Faculty Associates Medical Group Incorporated
  • Medical school: Georgetown University School Of Medicine · graduated 2009 (17 years since medical school)
  • Gender (as listed): Female
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Lesley Xiong, 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 Lesley Xiong accept Medicare assignment?
Yes. Medicare's clinician data says Lesley Xiong 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 Lesley Xiong see?
In 2024, CMS data shows 232 Original Medicare patients and 1,505 services for Lesley Xiong. This counts Original Medicare only and measures volume, not quality.
What is Lesley Xiong's NPI number?
1871723858. 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 Lesley Xiong, 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 patients232
Services billed to Medicare1,505
Different services or procedures46
Participating Medicare providerYes
Average age of these patients72

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)315 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)170 services
  3. Telephone medical discussion with physician, 21-30 minutes (99443)113 services
  4. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)113 services
  5. Annual alcohol misuse screening, 5 to 15 minutes (G0442)99 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 cholesterol71%
  • Diabetes35%
  • Arthritis30%
  • Ischemic heart disease27%
  • Heart failure27%

Hospitals where Lesley Xiong works

Medicare's Facility Affiliation Data lists Lesley Xiong 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.

  • Mercy Medical CenterMerced, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050444

Practice locations

Addresses where Lesley Xiong is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Lesley Xiong as a member of this group (CMS data updated October 2, 2026).

  • Merced Faculty Associates Medical Group Incorporated26 clinicians in the group

Specialties

Find other Family Practice doctors in California →

Other family doctors in Merced

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

All family doctors in Merced →

Other clinicians in Merced Faculty Associates Medical Group Incorporated

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolGeorgetown University School Of Medicine
Graduation year2009 (17 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1871723858
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