Mai Gu, MD
NPI 1821048257 · Anatomic Pathology & Clinical Pathology Physician · Corona, CA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mai Gu, MD is a Anatomic Pathology & Clinical Pathology Physician provider in Corona, CA (NPI 1821048257).
Provider details
- NPI number
- 1821048257
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A68810 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,499 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Evaluation of Fine Needle Aspirate With Interpretation and Report88173 | 399 | $172 |
| Evaluation of Fine Needle Aspirate88172 | 397 | $57 |
| Fine Needle Aspiration Biopsy Using Ultrasound Guidance, First Growth10005 | 244 | $139 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 208 | $114 |
| Fine Needle Aspiration Biopsy Using Ultrasound Guidance, Each Additional Growth10006 | 157 | $61 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 39 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-10
- Last updated
- 2020-08-05
- Certified
- 2020-08-05
Frequently asked questions
- What is Mai Gu's NPI number?
- Mai Gu's National Provider Identifier (NPI) is 1821048257, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mai Gu's specialty?
- Mai Gu is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Mai Gu located?
- Mai Gu's practice location on file with NPPES is 1810 Fullerton Ave Ste 102, Corona, CA 92881-3109.
- What is Mai Gu's phone number?
- The practice phone number listed in the NPPES registry for Mai Gu is (951) 808-8863.
- Does Mai Gu accept Medicare?
- Mai Gu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mai Gu's NPI active?
- Yes — Mai Gu's NPI (1821048257) is active in the NPPES registry as of the last update on 2020-08-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.