David Gu, D.O.
NPI 1225107006 · Internal Medicine Physician · Alhambra, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Gu, D.O. is a Internal Medicine Physician provider in Alhambra, CA (NPI 1225107006).
Provider details
- NPI number
- 1225107006
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 20A6851 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,839 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,207 | $98 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 273 | $113 |
| Annual Alcohol Misuse Screening, 5 to 15 MinutesG0442 | 189 | $21 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 176 | $140 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 175 | $21 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 150 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 262 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,118 | 221 |
| Losartan Potassium | 788 | 157 |
| Levocetirizine Dihydrochloride | 781 | 232 |
| Amlodipine Besylate | 734 | 131 |
| Metformin Hcl | 459 | 103 |
| Metoprolol Succinate | 431 | 85 |
| Celecoxib | 415 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$5,292 across 54 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-07
- Last updated
- 2014-05-02
Frequently asked questions
- What is David Gu's NPI number?
- David Gu's National Provider Identifier (NPI) is 1225107006, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Gu's specialty?
- David Gu is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Gu located?
- David Gu's practice location on file with NPPES is 723 S Garfield Ave, Alhambra, CA 91801-4429.
- What is David Gu's phone number?
- The practice phone number listed in the NPPES registry for David Gu is (626) 282-3999.
- Does David Gu accept Medicare?
- David Gu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Gu's NPI active?
- Yes — David Gu's NPI (1225107006) is active in the NPPES registry as of the last update on 2014-05-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.