Christopher Jenn Starr, MD/PHD
Diagnostic Radiology Physician · Downey, CA
Christopher Jenn Starr, MD/PHD is a diagnostic radiology physician with a practice address in Downey, California, and NPI 1144510652, issued on Apr 18, 2011. Check the license (California A123063, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Christopher Jenn Starr
- Credential
- MD/PHD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- A123063 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9333 Imperial Hwy, Downey, CA 90242
- Phone
- (562) 657-7254
- Enumerated
- Apr 18, 2011
- Record last updated
- Oct 28, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20171219003124); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →
Also registered at 9333 Imperial Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Christopher Jenn Starr in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A123063Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Southern California Permanente Medical GroupDowney, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Christopher Jenn Starr among 4,500 diagnostic radiology physician records in California
Christopher Jenn Starr, MD/PHD is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 70% of them.
- NPI issued2011 · 70% of these records are older, 27% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2011 · median 2004 among the 3,130 with a school on file
- Record last updated2021 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in California
There are 4,500 diagnostic radiology physician records in California.
All 4,500 in California → Every provider in Downey → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Shufong Wu, M.D.Downey, CA 902421356550636
- Ivan Barrett, M.D.Downey, CA 902411073571113
- Mark Dubin, M.D.Downey, CA 902411700843240
- Ali Goodarzi, M.D.Downey, CA 902411881737021
- Michael Hoffman, M.D.Downey, CA 902411497713838
- Penny Johnson, MDDowney, CA 902411497942106
- Julie Sun, M.D.Downey, CA 902411629036819
- Katherine Wei, MDDowney, CA 902411639707557
Common questions
What is Christopher Jenn Starr, MD/PHD's NPI number?
Christopher Jenn Starr, MD/PHD's National Provider Identifier (NPI) is 1144510652, issued on Apr 18, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Christopher Jenn Starr, MD/PHD located?
The NPPES record lists a practice address at 9333 Imperial Hwy, Downey, CA, 90242. Phone: (562) 657-7254. Providers update this record themselves, so call before visiting.
How can I verify Christopher Jenn Starr, MD/PHD's license?
NPPES lists California license number A123063, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.