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

Hand Surgery

Dainn Woo, MD

Works at hospitals in Los Angeles, CA · California

Summary

Dr. Dainn Woo, MD is a hand surgeon at 4140 W 190th St, Torrance, CA 90504. May accept Medicare assignment. NPI 1750919593. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026.

  • Specialty: Hand surgeon (Medicare lists Hand Surgery)
  • Address: 4140 W 190th St, Torrance, CA 90504 · Directions
  • Medicare: May accept Medicare assignment
  • Hospital: Cedars-Sinai Medical Center
  • Medical school: New York University School Of Medicine · graduated 2020 (6 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Dainn Woo, 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 Dainn Woo accept Medicare assignment?
Medicare's clinician data says Dainn Woo may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
What is Dainn Woo's NPI number?
1750919593. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Dainn Woo works

Medicare's Facility Affiliation Data lists Dainn Woo 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 Dainn Woo is enrolled with Medicare (CMS data updated October 2, 2026).

Specialties

Find other Hand Surgery doctors in California →

Other hand surgeons in Torrance

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

All hand surgeons in Torrance →

Clinician information

CredentialMD
Medical schoolNew York University School Of Medicine
Graduation year2020 (6 years since medical school)
Gender (as listed)Female
Medicare assignmentMay accept for some services
NPI (National Provider Identifier)1750919593
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. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  5. Medicare Care Compare — official Medicare tool to look up clinicians