Hamilton Chen, MD
NPI 1700019528 · Pain Medicine (Physical Medicine & Rehabilitation) Physician · Riverside, CA
Enrolled with Medicare as Practitioner - Physical Medicine and Rehabilitation · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hamilton Chen, MD is a Pain Medicine (Physical Medicine & Rehabilitation) Physician provider in Riverside, CA (NPI 1700019528).
Provider details
- NPI number
- 1700019528
- Entity type
- Individual
- Primary specialty
- Pain Medicine (Physical Medicine & Rehabilitation) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A113744 (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
16 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
1,793 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,217 | $91 |
| Testing for Presence of Drug, Read By Direct Observation80305 | 167 | $12 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 140 | $134 |
| Injection of Substance Into Lower Spine Canal Using Imaging Guidance62323 | 79 | $278 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 69 | $175 |
| Chronic Pain Management and Treatment, Monthly Bundle Including, Diagnosis; Assessment and Monitoring; Administration of a Validated Pain Rating Scale Or Tool; the Development, Implementation, Revision, And/Or Maintenance of a Person-Centered Care Plan Tha |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 562 | 317 |
| Gabapentin | 437 | 184 |
| Cyclobenzaprine Hcl | 224 | 93 |
| Tramadol Hcl | 211 | 117 |
| Celecoxib | 176 | 74 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 160 | 82 |
| Pregabalin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,229 across 38 records (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
- 2009-08-27
- Last updated
- 2016-05-18
Frequently asked questions
- What is Hamilton Chen's NPI number?
- Hamilton Chen's National Provider Identifier (NPI) is 1700019528, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hamilton Chen's specialty?
- Hamilton Chen is listed in the NPPES registry with a primary specialty of Pain Medicine (Physical Medicine & Rehabilitation) Physician (Allopathic & Osteopathic Physicians).
- Where is Hamilton Chen located?
- Hamilton Chen's practice location on file with NPPES is 6900 Brockton Ave, Riverside, CA 92506-3817.
- What is Hamilton Chen's phone number?
- The practice phone number listed in the NPPES registry for Hamilton Chen is (951) 784-7111.
- Does Hamilton Chen accept Medicare?
- Hamilton Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hamilton Chen's NPI active?
- Yes — Hamilton Chen's NPI (1700019528) is active in the NPPES registry as of the last update on 2016-05-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.