Joshua Ahn, MD
NPI 1528755816 · Psychiatry Physician · Colton, CA
Joshua Ahn, MD is a Psychiatry Physician provider in Colton, CA (NPI 1528755816).
Provider details
- NPI number
- 1528755816
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 204854 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
3 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.
$110 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
- 2023-04-18
- Last updated
- 2025-09-08
- Certified
- 2025-09-08
Frequently asked questions
- What is Joshua Ahn's NPI number?
- Joshua Ahn's National Provider Identifier (NPI) is 1528755816, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joshua Ahn's specialty?
- Joshua Ahn is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Joshua Ahn located?
- Joshua Ahn's practice location on file with NPPES is 400 N Pepper Ave, Colton, CA 92324-1801.
- What is Joshua Ahn's phone number?
- The practice phone number listed in the NPPES registry for Joshua Ahn is (510) 525-6927.
- Is Joshua Ahn's NPI active?
- Yes — Joshua Ahn's NPI (1528755816) is active in the NPPES registry as of the last update on 2025-09-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.