Quick answers
- Does Theresa W. Guo accept Medicare assignment?
- Yes. Medicare's clinician data says Theresa W. Guo 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 Theresa W. Guo see?
- In 2024, CMS data shows 148 Original Medicare patients and 436 services for Theresa W. Guo. This counts Original Medicare only and measures volume, not quality.
- What is Theresa W. Guo's NPI number?
- 1255694196. 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 Theresa W. Guo, 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 patients | 148 |
|---|---|
| Services billed to Medicare | 436 |
| Different services or procedures | 67 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)68 services
- Diagnostic exam of voice box using a flexible endoscope (31575)49 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)48 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)46 services
- Fine needle aspiration biopsy using ultrasound guidance, first growth (10005)20 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 pressure68%
- High cholesterol66%
- Arthritis45%
- Diabetes31%
- Chronic kidney disease27%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)26%
Hospitals where Theresa W. Guo works
Medicare's Facility Affiliation Data lists Theresa W. Guo 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.
- UC San Diego Health Hillcrest - Hillcrest Medical CenterSan Diego, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050025
Practice locations
Addresses where Theresa W. Guo is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.
- 16950 Via TazonSan Diego, CA 92127 (800) 926‑8273
- 200 W Arbor DrSan Diego, CA 92103
- 3855 Health Sciences DrLa Jolla, CA 92093 (858) 657‑7000
- 9300 Campus Point DrLa Jolla, CA 92037 (858) 657‑7000
- 9350 Campus Point DrLa Jolla, CA 92037 (858) 657‑7000
Group practices
Medicare enrollment lists Theresa W. Guo as a member of this group (CMS data updated October 2, 2026).
- Regents of the University of California2,089 clinicians in the group
Specialties
- Otolaryngologyprimary
Other ENT doctors in San Diego
Clinicians with the same Medicare primary specialty in San Diego, CA — not a recommendation.
Other clinicians in Regents of the University of California
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University |
| Graduation year | 2012 (14 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1255694196 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians