Monica N. Stiles, DO

Medicare activity in 2024

Official CMS public-use data for Monica N. Stiles, 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 hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)447 services
2. Hospital discharge day management, more than 30 minutes (99239)97 services
3. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)50 services
4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)21 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%
• Arthritis50%
• Diabetes49%
• Chronic kidney disease49%
• Ischemic heart disease45%

Hospitals where Monica N. Stiles works

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

• 2700 Grant St, Suite 200Concord, CA 94520 (925) 674‑0500

Group practices

Medicare enrollment lists Monica N. Stiles as a member of this group (CMS data updated October 2, 2026).

• John Muir Physician Network494 clinicians in the group

Specialties

• Hospitalistprimary

Find other Hospitalist doctors in California →

Other hospitalists in Concord

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

• Minal A. Shah, MD
• Shikha Gupta, MD
• Hazel Mae A. Abraham, MD
• Elaine J. Tang, MD
• Vasili Dzerhachou, MD
• Kevin Mabunga, MD
• Ruchita Savalia, DO
• Ashwin S. Doss, MD

All hospitalists in Concord →

Other clinicians in John Muir Physician Network

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

• Ariel Badger, MD
• Cynthia Ashbrook, MD
• Chris S. Burkhart, MD
• Lindsay D. Wagner, PA
• Jason Liu, MD
• Carolyn S. Lacey, 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