Karen Michelle Guiang, DO

Medicare activity in 2024

Official CMS public-use data for Karen Michelle Guiang, 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 50 minutes (99233)4,042 services
2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)623 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)479 services
4. Infusion, normal saline solution, 250 cc (J7050)306 services
5. Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less (96365)153 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%
• Diabetes64%
• Heart failure59%
• Chronic kidney disease58%
• Arthritis52%

Hospitals where Karen Michelle Guiang works

Medicare's Facility Affiliation Data lists Karen Michelle Guiang 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.

• Emanate Health Foothill Presbyterian HospitalGlendora, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050597
• San Antonio Regional HospitalUpland, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050099

Practice locations

Addresses where Karen Michelle Guiang is enrolled with Medicare (CMS data updated October 2, 2026).

• 935 W Foothill BlvdClaremont, CA 91711 (626) 851‑8880

Group practices

Medicare enrollment lists Karen Michelle Guiang as a member of this group (CMS data updated October 2, 2026).

• Streng Bassi Begum and Jiang Medical Corporation7 clinicians in the group

Specialties

• Infectious Diseaseprimary

Find other Infectious Disease doctors in California →

Other infectious disease doctors in Claremont

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

• Atia A. Shah, MD
• Deepthi Jayasekara, MD
• Nasima Begum, MD
• Sohanjeet S. Bassi, MD
• Hua Jiang, MD

All infectious disease doctors in Claremont →

Other clinicians in Streng Bassi Begum and Jiang Medical Corporation

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

• Atia A. Shah, MD
• Deepthi Jayasekara, MD
• Nasima Begum, MD
• Sohanjeet S. Bassi, MD
• Katrina Anne C. Sandejas, MD
• Hua Jiang, 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