Mark Halim
NPI 1558998542 · Child & Adolescent Psychiatry Physician · Fontana, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Halim is a Child & Adolescent Psychiatry Physician provider in Fontana, CA (NPI 1558998542).
Provider details
- NPI number
- 1558998542
- Entity type
- Individual
- Primary specialty
- Child & Adolescent Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- A177063 (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 tenure33% of score
6 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$145 across 1 record (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
- 2020-03-27
- Last updated
- 2025-09-15
- Certified
- 2025-09-15
Frequently asked questions
- What is Mark Halim's NPI number?
- Mark Halim's National Provider Identifier (NPI) is 1558998542, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Halim's specialty?
- Mark Halim is listed in the NPPES registry with a primary specialty of Child & Adolescent Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Halim located?
- Mark Halim's practice location on file with NPPES is 17234 Valley Blvd., Fontana, CA 92335.
- What is Mark Halim's phone number?
- The practice phone number listed in the NPPES registry for Mark Halim is (661) 998-0424.
- Does Mark Halim accept Medicare?
- Mark Halim is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Halim's NPI active?
- Yes — Mark Halim's NPI (1558998542) is active in the NPPES registry as of the last update on 2025-09-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.