Irwin H. Lee, MD
Radiation Oncology Physician · Rohnert Park, CA
Irwin H. Lee, MD is a radiation oncology physician with a practice address in Rohnert Park, California, and NPI 1861510760, issued on Mar 27, 2007. Check the license (California A103038, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Irwin H. Lee
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- A103038 CA
4301081665 MI
Self-reported in NPPES; status is on the state search - Practice location
- 301 Professional Center Dr, Rohnert Park, CA 94928
- Phone
- (707) 584-2200
- Enumerated
- Mar 27, 2007
- Record last updated
- Jul 19, 2023
- Fax
- (707) 584-7582
- Medicaid ID
- 1861510760 CA
- Medicare enrollment
- Enrolled (PECOS I20090123000399); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 2003
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Also registered at 301 Professional Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marc Fields, MDRadiation Oncology Physician1730143066
- Peter Hawkins, M.D., PH.D.Radiation Oncology Physician1962820621
- Nikhil Rao, MDRadiation Oncology Physician1275737850
Verify Irwin H. Lee in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A103038Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% more Medicare Part D claims than the average radiation oncology physician in 2024
226 Medicare Part D claims for 90 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 37 claims were for opioids.
Most prescribed
- Levothyroxine Sodium37 claims
- Tamsulosin Hcl35 claims
- Sf22 claims
- Lidocaine Hcl Viscous18 claims
- Ssd15 claims
- Bicalutamide14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Cancer Therapy Medical Group IncRohnert Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Irwin H. Lee among 735 radiation oncology physician records in California
Irwin H. Lee, MD is one of 735 radiation oncology physician records with a practice address in California. 83% 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 45% of them.
- NPI issued2007 · 45% of these records are older, 43% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2003 · median 2005 among the 545 with a school on file
- Record last updated2023 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in California
There are 735 radiation oncology physician records in California.
All 735 in California → Every provider in Rohnert Park → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Marc Fields, MDRohnert Park, CA 949281730143066
- Peter Hawkins, M.D., PH.D.Rohnert Park, CA 949281962820621
- Nikhil Rao, MDRohnert Park, CA 949281275737850
- Allan Rappaport, M.D., J.D.Tiburon, CA 949201346310539
- Mark Rounsaville, MDNicasio, CA 949461033100284
- Francine Halberg, MDGreenbrae, CA 949041275515256
- Lloyd Miyawaki, MDGreenbrae, CA 949041497737464
- Joseph Poen, MDGreenbrae, CA 949041972585941
Common questions
What is Irwin H. Lee, MD's NPI number?
Irwin H. Lee, MD's National Provider Identifier (NPI) is 1861510760, issued on Mar 27, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Irwin H. Lee, MD located?
The NPPES record lists a practice address at 301 Professional Center Dr, Rohnert Park, CA, 94928. Phone: (707) 584-2200. Providers update this record themselves, so call before visiting.
How can I verify Irwin H. Lee, MD's license?
NPPES lists California license number A103038, 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.
How much does Irwin H. Lee, MD prescribe under Medicare Part D?
In 2024, Irwin H. Lee, MD had 226 Medicare Part D claims for 90 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
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.