NPPES file of Aug 9, 2026

Ronald Joseph Collins, M.D.

Internal Medicine Physician · Downey, CA

Ronald Joseph Collins, M.D. is an internal medicine physician with a practice address in Downey, California, and NPI 1235176181, issued on May 31, 2006. Check the license (California A48184, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1235176181
Name
Ronald Joseph Collins
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License numbers
A48184 CA
MD-6143 HI
Self-reported in NPPES; status is on the state search
Practice location
9449 Imperial Hwy, Downey, CA 90242
Phone
(562) 657-4060
Enumerated
May 31, 2006
Record last updated
May 27, 2025
Fax
(562) 657-2399
Medicare enrollment
Enrolled (PECOS I20060706000220); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →

Also registered at 9449 Imperial Hwy

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Gary AfferinoPharmacist1437696267
  2. Stephanie Angarita, M.D.Surgical Oncology Physician1003259219
  3. Melanie Aoki, PH.D.Cognitive & Behavioral Psychologist1588865489
  4. Glenn Arnoco, FNPFamily Medicine Physician1629633391
  5. Shant Ashdjian, M.D.Obstetrics & Gynecology Physician1841502457
  6. Sana Ashraf, MDPediatric Cardiology Physician1316177215

Verify Ronald Joseph Collins in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A48184    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through 2 group practices

  1. Inland Behavioral And Health Services IncSan Bernadino, CA
  2. Santa Barbara County AuditorSanta Barbara, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Ronald Joseph Collins among 17,696 internal medicine physician records in California

Ronald Joseph Collins, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.

  • NPI issued2006 · 5% of these records are older, 56% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 63% of these records are
  • Graduated1985 · median 2004 among the 11,065 with a school on file
  • Record last updated2025 · 61% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

114 internal medicine physician records list a practice address in Downey

They are 114 of the 3,607 NPPES records with a practice address in Downey, and 17,696 internal medicine physician records in California.

All 17,696 in California → Every provider in Downey → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Sohail Afra, M.D.Downey, CA 902421023125176
  2. Ron Chai, M.D.Downey, CA 902421447361316
  3. Rashmi Desai, M.D.Downey, CA 902421801990247
  4. Basuki Gunawan, M.D.Downey, CA 902421346352473
  5. Danese Hayes, M.D.Downey, CA 902421689786733
  6. Goethe Hsu, M.D.Downey, CA 902421386656726
  7. Diana Hsu, M.D.Downey, CA 902421720090137
  8. Nageswari Krishnareddy, MDDowney, CA 902421780785873

Common questions

What is Ronald Joseph Collins, M.D.'s NPI number?

Ronald Joseph Collins, M.D.'s National Provider Identifier (NPI) is 1235176181, issued on May 31, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Ronald Joseph Collins, M.D. located?

The NPPES record lists a practice address at 9449 Imperial Hwy, Downey, CA, 90242. Phone: (562) 657-4060. Providers update this record themselves, so call before visiting.

How can I verify Ronald Joseph Collins, M.D.'s license?

NPPES lists California license number A48184, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.