Jefferson Chen, MD PHD
NPI 1992789747 · Neurological Surgery Physician · Orange, CA
Enrolled with Medicare as Practitioner - Neurosurgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jefferson Chen, MD PHD is a Neurological Surgery Physician provider in Orange, CA (NPI 1992789747).
Provider details
- NPI number
- 1992789747
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD PHD
- Sex
- Male
- Sole proprietor
- No
- License
- MD21924 (OR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
595 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 167 | $101 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 103 | $68 |
| Reprogramming of Cerebrospinal Fluid Shunt62252 | 65 | $45 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 54 | $122 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 42 | $81 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More |
Practice location
Mailing address
Additional practice locations (1)
- 501 N Graham StPacific Neursurgical PC #580Portland, OR 97227-1654Phone: (503) 788-6721Fax: (503) 788-6721
Registry dates
- Enumerated
- 2005-12-05
- Last updated
- 2022-11-03
- Certified
- 2022-11-03
Frequently asked questions
- What is Jefferson Chen's NPI number?
- Jefferson Chen's National Provider Identifier (NPI) is 1992789747, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jefferson Chen's specialty?
- Jefferson Chen is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Jefferson Chen located?
- Jefferson Chen's practice location on file with NPPES is 101 the City Dr S, Orange, CA 92868-3201.
- What is Jefferson Chen's phone number?
- The practice phone number listed in the NPPES registry for Jefferson Chen is (714) 880-7812.
- Does Jefferson Chen accept Medicare?
- Jefferson Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jefferson Chen's NPI active?
- Yes — Jefferson Chen's NPI (1992789747) is active in the NPPES registry as of the last update on 2022-11-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.