Mark A. Bisignani, MD
Radiation Oncology Physician · Ukiah, CA
Mark A. Bisignani, MD is a radiation oncology physician with a practice address in Ukiah, California, and NPI 1487655882, issued on Aug 9, 2005. Check the license (California G151223, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark A. Bisignani
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- G151223 CA
38599 MN
Self-reported in NPPES; status is on the state search - Practice location
- 1165 S Dora St, Ukiah, CA 95482
- Phone
- (707) 463-3636
- Enumerated
- Aug 9, 2005
- Record last updated
- Nov 28, 2023
- Fax
- (707) 463-2714
- Medicaid IDs
- 32628800 MN
001219000 MN - Medicare enrollment
- Enrolled (PECOS I20180924001155); accepts Medicare assignment
- Medical or professional school
- University Of Pittsburgh School Of Medicine, 1992
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Also registered at 1165 S Dora St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Donald Coursey, MDOtolaryngology Physician1689770364
- Laurence Hartley, MDGynecology Physician1083647226
- Thomas Kilkenny, MDOrthopaedic Surgery Physician1114007093
- Michael Weil, MDRadiation Oncology Physician1801322268
- Qi Zhang, M.D.Otolaryngology Physician1194085324
Verify Mark A. Bisignani in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G151223Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average radiation oncology physician in 2024
12 Medicare Part D claims for 11 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
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 2 group practices
- Minneapolis Radiation Oncology PAShakopee, MN
- Providence Medical FoundationUkiah, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark A. Bisignani among 735 radiation oncology physician records in California
Mark A. Bisignani, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1992 · 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 Ukiah → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Jay Joseph, M.D.Ukiah, CA 954821396835153
- Michael Weil, MDUkiah, CA 954821801322268
- Douglas Kelly, MDEureka, CA 955011497716781
- Join Luh, M.D.Eureka, CA 955011093809634
- Michael Chen, M.D.Santa Rosa, CA 954091417104720
- Frederick David, M.D.Santa Rosa, CA 954031982793808
- Cindy Scharfen, M.D.Santa Rosa, CA 954031861582322
- Jorge Weibel, M.D.Trinidad, CA 955701356594923
Common questions
What is Mark A. Bisignani, MD's NPI number?
Mark A. Bisignani, MD's National Provider Identifier (NPI) is 1487655882, issued on Aug 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Bisignani, MD located?
The NPPES record lists a practice address at 1165 S Dora St, Ukiah, CA, 95482. Phone: (707) 463-3636. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Bisignani, MD's license?
NPPES lists California license number G151223, 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 Mark A. Bisignani, MD prescribe under Medicare Part D?
In 2024, Mark A. Bisignani, MD had 12 Medicare Part D claims for 11 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.