Ann Nguyen Traxler, MD

Medicare activity in 2024

Official CMS public-use data for Ann Nguyen Traxler, 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.

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)497 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)342 services
3. Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)316 services
4. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)203 services
5. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)84 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 cholesterol75%
• High blood pressure69%
• Arthritis39%
• Osteoporosis36%
• Anxiety26%
• Diabetes25%

Hospitals where Ann Nguyen Traxler works

Medicare's Facility Affiliation Data lists Ann Nguyen Traxler 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.

• John Muir Medical Center - Concord CampusConcord, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050496
• John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050180

Practice locations

Addresses where Ann Nguyen Traxler is enrolled with Medicare (CMS data updated October 2, 2026).

• 1210 Rossmoor PkwyWalnut Creek, CA 94595 (925) 933‑1210

Group practices

Medicare enrollment lists Ann Nguyen Traxler as a member of this group (CMS data updated October 2, 2026).

• Rossmoor Medical Associates Inc5 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Walnut Creek

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

• Tiffany H. Phan, MD
• Tsao-Yu Liang, MD
• Patricia Anne S. Atal, MD
• Eshandeep S. Boparai, MD
• Sinan N. Alshahwany, MD
• Rujuta J. Manghani, MD
• Kevin Chen, MD
• Yesha K. Shah, DO

All internal medicine doctors in Walnut Creek →

Other clinicians in Rossmoor Medical Associates Inc

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

• Nie Coleen S. Ebajay, NP
• Rita Sharma, PA
• Harneet Chopra, MD
• Pedram Taher, MD

Clinician information

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