Harrison Chen, DO
NPI 1841829793 · Internal Medicine Physician · Arcadia, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Harrison Chen, DO is a Internal Medicine Physician provider in Arcadia, CA (NPI 1841829793).
Provider details
- NPI number
- 1841829793
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 20A19990 (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
6 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
1,616 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 1,053 | $122 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 299 | $119 |
| Advance Care Planning, First 30 Minutes99497 | 239 | $78 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 25 | $179 |
Typical Medicare-allowed amounts for these services range $78–$179 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 23 | 23 |
| Prednisone | 19 | 12 |
| Doxycycline Hyclate | 15 | 15 |
| Azithromycin | 12 | 12 |
| Ceftriaxone Sodiumbrand: Ceftriaxone | 12 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 11 | — |
| Ampicillin Sod/Sulbactam Sod |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$157 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
- 2020-04-03
- Last updated
- 2023-07-21
- Certified
- 2023-07-21
Frequently asked questions
- What is Harrison Chen's NPI number?
- Harrison Chen's National Provider Identifier (NPI) is 1841829793, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harrison Chen's specialty?
- Harrison Chen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Harrison Chen located?
- Harrison Chen's practice location on file with NPPES is 300 W Huntington Dr Rm No52, Arcadia, CA 91007-3402.
- What is Harrison Chen's phone number?
- The practice phone number listed in the NPPES registry for Harrison Chen is (265) 743-4426.
- Does Harrison Chen accept Medicare?
- Harrison Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Harrison Chen's NPI active?
- Yes — Harrison Chen's NPI (1841829793) is active in the NPPES registry as of the last update on 2023-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.