Cecil Olaya Robertson, M. D.
Hematology & Oncology Physician · Santa Maria, CA
Cecil Olaya Robertson, M. D. is a hematology & oncology physician with a practice address in Santa Maria, California, and NPI 1780640631, issued on Apr 20, 2006. Check the license (California G86347, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Cecil Olaya Robertson
- Credential
- M. D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- G86347 CA
ME65760 FL
Self-reported in NPPES; status is on the state search - Practice location
- 1325 E Church St Ste 301, Santa Maria, CA 93454
- Phone
- (805) 349-9393
- Enumerated
- Apr 20, 2006
- Record last updated
- Jul 2, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicaid ID
- 252763400 FL
- Medicare enrollment
- Enrolled (PECOS I20200518002302); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 1986
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 1325 E Church St Ste 301
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Keith Ayrons, M.D.Hematology & Oncology Physician1831143775
- Wei Bai, MDHematology & Oncology Physician1053567545
- Ginger CarmichaelNurse Practitioner1760974018
- Brent Cham, MDMedical Oncology Physician1265061600
- Heather Cunningham, MDHematology & Oncology Physician1134359581
- Kathleen Kennedy, M.D.Hematology & Oncology Physician1528080967
Verify Cecil Olaya Robertson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G86347Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,215 Medicare Part D claims for 327 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 50 claims were for opioids.
Most prescribed
- Prednisone101 claims
- Prochlorperazine Maleate69 claims
- Eliquis61 claims
- Ondansetron Odt47 claims
- Abiraterone Acetate45 claims
- Famotidine43 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 82.9 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).
Industry payments in 2024: $1,019.54
46 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. 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.
Cecil Olaya Robertson among 1,583 hematology & oncology physician records in California
Cecil Olaya Robertson, M. D. is one of 1,583 hematology & 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 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1986 · median 2003 among the 1,124 with a school on file
- Record last updated2019 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Santa Maria → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Keith Ayrons, M.D.Santa Maria, CA 934541831143775
- Wei Bai, MDSanta Maria, CA 934541053567545
- Heather Cunningham, MDSanta Maria, CA 934541134359581
- Robert Dichmann, MDSanta Maria, CA 934541245232578
- Kathleen Kennedy, M.D.Santa Maria, CA 934541528080967
- Kevin Kim, M.D.Santa Maria, CA 934541689768848
- Dustin Stevenson, D.O.Santa Maria, CA 934541962610279
- Eric Bank, M.D.Solvang, CA 934631720423882
Common questions
What is Cecil Olaya Robertson, M. D.'s NPI number?
Cecil Olaya Robertson, M. D.'s National Provider Identifier (NPI) is 1780640631, issued on Apr 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cecil Olaya Robertson, M. D. located?
The NPPES record lists a practice address at 1325 E Church St Ste 301, Santa Maria, CA, 93454. Phone: (805) 349-9393. Providers update this record themselves, so call before visiting.
How can I verify Cecil Olaya Robertson, M. D.'s license?
NPPES lists California license number G86347, 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 Cecil Olaya Robertson, M. D. prescribe under Medicare Part D?
In 2024, Cecil Olaya Robertson, M. D. had 1,215 Medicare Part D claims for 327 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Cecil Olaya Robertson, M. D.'s MIPS final score?
The 2023 MIPS final score is 82.9 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.