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Internal Medicine

Anne Rae B. Ong, MD

Works at hospitals in Olympia, WA · Washington

Summary

Dr. Anne Rae B. Ong, MD is an internal medicine doctor at 413 Lilly Rd NE, Olympia, WA 98506. Phone: (360) 493-4083. Accepts Medicare assignment. In 2024, Anne Rae B. Ong had 125 Original Medicare patients and 437 services. NPI 1164692539. 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: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 413 Lilly Rd NE, Olympia, WA 98506 · Directions (1 more location)
  • Phone: (360) 493‑4083
  • Medicare: Accepts Medicare assignment
  • Hospital: Providence St Peter Hospital
  • Group practice: Providence Health and Services Washington
  • Medical school: Mercer University School Of Medicine · graduated 2006 (20 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Anne Rae B. Ong, 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 Anne Rae B. Ong accept Medicare assignment?
Yes. Medicare's clinician data says Anne Rae B. Ong 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 Anne Rae B. Ong see?
In 2024, CMS data shows 125 Original Medicare patients and 437 services for Anne Rae B. Ong. This counts Original Medicare only and measures volume, not quality.
What is Anne Rae B. Ong's NPI number?
1164692539. 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 Anne Rae B. Ong, 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 patients125
Services billed to Medicare437
Different services or procedures9
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)225 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)126 services
  3. Hospital discharge day management, more than 30 minutes (99239)44 services
  4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)16 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%
  • Arthritis52%
  • Heart failure50%
  • Atrial fibrillation43%
  • Anxiety42%

Hospitals where Anne Rae B. Ong works

Medicare's Facility Affiliation Data lists Anne Rae B. Ong 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 Anne Rae B. Ong is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Anne Rae B. Ong as a member of this group (CMS data updated October 2, 2026).

  • Providence Health and Services Washington475 clinicians in the group

Specialties

Find other Internal Medicine doctors in Washington →

Other internal medicine doctors in Olympia

Clinicians with the same Medicare primary specialty in Olympia, WA — not a recommendation.

All internal medicine doctors in Olympia →

Other clinicians in Providence Health and Services Washington

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

Clinician information

CredentialMD
Medical schoolMercer University School Of Medicine
Graduation year2006 (20 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1164692539
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