Irwin R. Maier, M.D.
Diagnostic Radiology Physician · Red Bluff, CA
Irwin R. Maier, M.D. is a diagnostic radiology physician with a practice address in Red Bluff, California, and NPI 1275538431, issued on Jun 15, 2005. Check the license (California A61466, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Irwin R. Maier
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- A61466 CA
Self-reported in NPPES; status is on the state search - Practice location
- 21320 Penneleme RD, Red Bluff, CA 96080
- Phone
- (952) 595-1100
- Enumerated
- Jun 15, 2005
- Record last updated
- Jan 9, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (612) 294-4903
- Medicare enrollment
- Enrolled (PECOS I20050822001345); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 1995
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →
Verify Irwin R. Maier in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A61466Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Northern California Imaging Associates Medical Group IncRed Bluff, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Irwin R. Maier among 4,500 diagnostic radiology physician records in California
Irwin R. Maier, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1995 · median 2004 among the 3,130 with a school on file
- Record last updated2017 · 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 Red Bluff → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Danny Casey, M.D.Red Bluff, CA 960801619992039
- Jack Kure, M.D.Red Bluff, CA 960801477577955
- Richard Steffens, M.D.Red Bluff, CA 960801225058472
- Thomas Gandy, MDPalo Cedro, CA 960731316345135
- Scott Bleazard, MDMt Shasta, CA 960671679695761
- Carrie Carlin, MDMount Shasta, CA 960671518948314
- Rebecca Dyson, M.D.Mount Shasta, CA 960671922003961
- Peter Halt, M.D.Mount Shasta, CA 960671396740338
Common questions
What is Irwin R. Maier, M.D.'s NPI number?
Irwin R. Maier, M.D.'s National Provider Identifier (NPI) is 1275538431, issued on Jun 15, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Irwin R. Maier, M.D. located?
The NPPES record lists a practice address at 21320 Penneleme RD, Red Bluff, CA, 96080. Phone: (952) 595-1100. Providers update this record themselves, so call before visiting.
How can I verify Irwin R. Maier, M.D.'s license?
NPPES lists California license number A61466, 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 Irwin R. Maier, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.