Penny Roumanis Johnson, MD
Diagnostic Radiology Physician · Downey, CA
Penny Roumanis Johnson, MD is a diagnostic radiology physician with a practice address in Downey, California, and NPI 1497942106, issued on Sep 26, 2007. Check the license (California A121083, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Penny Roumanis Johnson
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- A121083 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11411 Brookshire Ave Ste 101, Downey, CA 90241
- Phone
- (562) 869-9192
- Enumerated
- Sep 26, 2007
- Record last updated
- Jun 1, 2023
- Medicare enrollment
- Enrolled (PECOS I20130103000167); accepts Medicare assignment
- Medical or professional school
- Northeastern Ohio University College Of Medicine, 2007
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →
Also registered at 11411 Brookshire Ave Ste 101
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Katherine Wei, MDDiagnostic Radiology Physician1639707557
Verify Penny Roumanis Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A121083Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 93.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- United Medical Imaging Healthcare IncInglewood, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Penny Roumanis Johnson among 4,500 diagnostic radiology physician records in California
Penny Roumanis Johnson, MD 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 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 41% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2007 · median 2004 among the 3,130 with a school on file
- Record last updated2023 · 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
- 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
- Julie Sun, M.D.Downey, CA 902411629036819
- Katherine Wei, MDDowney, CA 902411639707557
- David WohlmuthDowney, CA 902411427016625
- Joel Levine, M.D.Downey, CA 902401881655769
Common questions
What is Penny Roumanis Johnson, MD's NPI number?
Penny Roumanis Johnson, MD's National Provider Identifier (NPI) is 1497942106, issued on Sep 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Penny Roumanis Johnson, MD located?
The NPPES record lists a practice address at 11411 Brookshire Ave Ste 101, Downey, CA, 90241. Phone: (562) 869-9192. Providers update this record themselves, so call before visiting.
How can I verify Penny Roumanis Johnson, MD's license?
NPPES lists California license number A121083, 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.
What is Penny Roumanis Johnson, MD's MIPS final score?
The 2023 MIPS final score is 93.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.