Kathryn B. Bollin, M.D.
Hematology & Oncology Physician · San Diego, CA
Kathryn B. Bollin, M.D. is a hematology & oncology physician with a practice address in San Diego, California, and NPI 1801020334, issued on May 12, 2009. Check the license (California A131480, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kathryn B. Bollin
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A131480 CA
Self-reported in NPPES; status is on the state search - Practice location
- 501 Washington St Ste 508, San Diego, CA 92103
- Phone
- (619) 849-4469
- Enumerated
- May 12, 2009
- Record last updated
- Jan 2, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (619) 849-1547
- Medicare enrollment
- Enrolled (PECOS I20150526002484); accepts Medicare assignment
- Medical or professional school
- Texas A & M University System, Hsc, College Of Medicine, 2009
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 501 Washington St Ste 508
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Houman Dahi, MDPulmonary Disease Physician1598732604
- Dia Jones, FNPFamily Nurse Practitioner1841700093
- Ann Kuo, M.D.Internal Medicine Physician1790030005
- Joseph Resnikoff, M.D.Pulmonary Disease Physician1730193996
- Aditya Sarvaria, MDHematology & Oncology Physician1407116627
- Marin Xavier, MDMedical Oncology Physician1437211372
Verify Kathryn B. Bollin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A131480Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
542 Medicare Part D claims for 116 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 34 claims were for opioids.
Most prescribed
- Levothyroxine Sodium72 claims
- Prednisone35 claims
- Gabapentin27 claims
- Potassium Chloride26 claims
- Alprazolam21 claims
- Anastrozole18 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.
Industry payments in 2024: $1,527.45
57 payments; by number, the most common kind was food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Scripps HealthSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
Other hematology & oncology physician records in California
- Mark Abate, M.D.Santa Barbara, CA1588778674
- Iman Abdalla, MDLos Angeles, CA1730248311
- Haifaa Abdulhaq, MDFresno, CA1508024647
- Nihal Abdulla, MDLos Alamitos, CA1750585345
- Mehrad Abedi, M.D.Sacramento, CA1467459222
- Oyewale Abidoye, M.D.La Jolla, CA1790841815
- Mohammed Abu Zaanona, MDSanta Barbara, CA1922591197
- Mohamad Adada, M.D., PHDRoseville, CA1528590734
- Jesse Adams, MDSacramento, CA1851479554
- Thompson Adams, MDSanta Monica, CA1407880891
Common questions
What is Kathryn B. Bollin, M.D.'s NPI number?
Kathryn B. Bollin, M.D.'s National Provider Identifier (NPI) is 1801020334, issued on May 12, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Kathryn B. Bollin, M.D. located?
The NPPES record lists a practice address at 501 Washington St Ste 508, San Diego, CA, 92103. Phone: (619) 849-4469. Providers update this record themselves, so call before visiting.
How can I verify Kathryn B. Bollin, M.D.'s license?
NPPES lists California license number A131480, 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 Kathryn B. Bollin, M.D. prescribe under Medicare Part D?
In 2024, Kathryn B. Bollin, M.D. had 542 Medicare Part D claims for 116 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.