Holly Dieu, M.D.
NPI 1184155285 · Internal Medicine Physician · Santa Monica, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Holly Dieu, M.D. is a Internal Medicine Physician provider in Santa Monica, CA (NPI 1184155285).
Provider details
- NPI number
- 1184155285
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A159955 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
271 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 107 | $121 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 38 | $92 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 33 | $17 |
| Administration of Influenza Virus VaccineG0008 | 20 | $35 |
| Annual Wellness Visit; Includes a Personalized Prevention Plan of Service (pps), Initial VisitG0438 | 16 | $178 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 117 | 36 |
| Amlodipine Besylate | 55 | 22 |
| Fluticasone Propionate | 43 | 13 |
| Lisinopril | 34 | 13 |
| Semaglutidebrand: Ozempic | 24 | — |
| Losartan Potassium | 24 | — |
| Metformin Hcl |
Practice location
Mailing address
Additional practice locations (1)
- 1245 16th St Ste 204Santa Monica, CA 90404-1240Phone: (310) 319-4141Fax: (310) 319-4371
Registry dates
- Enumerated
- 2017-03-21
- Last updated
- 2023-01-13
- Certified
- 2022-11-01
Frequently asked questions
- What is Holly Dieu's NPI number?
- Holly Dieu's National Provider Identifier (NPI) is 1184155285, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Holly Dieu's specialty?
- Holly Dieu is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Holly Dieu located?
- Holly Dieu's practice location on file with NPPES is 1250 16th St Ste 125, Santa Monica, CA 90404-1249.
- What is Holly Dieu's phone number?
- The practice phone number listed in the NPPES registry for Holly Dieu is (310) 315-8900.
- Does Holly Dieu accept Medicare?
- Holly Dieu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Holly Dieu's NPI active?
- Yes — Holly Dieu's NPI (1184155285) is active in the NPPES registry as of the last update on 2023-01-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.