1. Home
  2. Directory
  3. California
  4. Santa Monica
  5. Internal Medicine
  6. NPI Profile

HOLLY DIEU M.D.
NPI 1184155285
Internal Medicine in Santa Monica, CA

Active since March 21, 2017PECOS EnrolledAccepts Medicare Assignment
1250 16TH ST STE 125, SANTA MONICA, CA 90404(310) 315-8900(310) 315-8902 Get Directions Write a Review

NPPES record last updated: January 13, 2023. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jan 13, 2023, Nov 1, 2022, Aug 13, 2021 and 2 more (5 updates tracked since 2017).

About Holly Dieu M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

HOLLY DIEU M.D. (NPI 1184155285) is an individual internal medicine provider in Santa Monica, California, licensed in California (A159955) and active in the NPI registry since March 2017. She is enrolled in Medicare PECOS, maintains a secondary practice location in Santa Monica, and is a graduate of Other (2017).

NPPES Registry Identity

NPI1184155285
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameHOLLY DIEUCredential: M.D.
Location Address1250 16TH ST STE 125Santa Monica, CA 90404-1249
Mailing Address5767 W Century Blvd Ste 400Los Angeles, CA 90045-5631 · (310) 301-8707 · Fax (310) 301-8751
Phone(310) 315-8900
Fax(310) 315-8902
Sole ProprietorNo
Medical School CMSOtherGraduated 2017
Enumeration DateMarch 21, 2017
Last NPPES UpdateJanuary 13, 20235 updates tracked since enumeration
NPPES CertifiedNovember 1, 2022
✔ NPI 1184155285 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A159955
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedPediatricsTaxonomy 208000000X · License A159955 (CA)
1250 16TH ST STE 125, Santa Monica, CA 90404
Open in Google Maps ↗

Secondary Practice Location 1

Location 11245 16th St Ste 204Santa Monica, CA 90404-1240 · Phone (310) 319-4141 · Fax (310) 319-4371

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Holly Dieu M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5597090506
PECOS Enrollment IDI20190712002650
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
107 services73 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
38 services35 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
20 services20 patients
Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit G0438
An annual wellness visit is a yearly appointment with your doctor to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's an opportunity to discuss your health status and goals and get a plan tailored for you.
16 services16 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
16 services16 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90404 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Holly Dieu's NPI number?

The NPI number for Holly Dieu is 1184155285. It was assigned to this individual provider in the NPPES registry on March 21, 2017.

Where is Holly Dieu located?

Holly Dieu practices at 1250 16th St Ste 125, Santa Monica, CA 90404. The listed phone number is (310) 315-8900.

What is Holly Dieu's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Holly Dieu enrolled in Medicare?

Yes. Holly Dieu is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Holly Dieu was last updated on January 13, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.