Erin Chamberlain, M.D.
Hematology & Oncology Physician · San Luis Obispo, CA
Erin Chamberlain, M.D. is a hematology & oncology physician with a practice address in San Luis Obispo, California, and NPI 1902249469, issued on Apr 15, 2013. Check the license (California A142151, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Erin Chamberlain
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A142151 CA
Self-reported in NPPES; status is on the state search - Practice location
- 892 Aerovista PL Ste 240, San Luis Obispo, CA 93401
- Phone
- (805) 543-8252
- Enumerated
- Apr 15, 2013
- Record last updated
- Mar 7, 2023
- Medicare enrollment
- Enrolled (PECOS I20190709001677); accepts Medicare assignment
- Medical or professional school
- Oregon Health Sciences University School Of Medicine, 2013
- 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 892 Aerovista PL Ste 240
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Darby Bosco, MS, LCGCGenetic Counselor (M.S.)1700751245
- Joseph ClevelandHematology & Oncology Physician1992209381
- Kelli Compean, NPFamily Nurse Practitioner1114488830
- Brian Dicarlo, MDHematology & Oncology Physician1982728796
- Mary Okimoto, NPNurse Practitioner1144400771
- Levanto Schachter, D.O.Hematology & Oncology Physician1093031668
Verify Erin Chamberlain in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A142151Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
867 Medicare Part D claims for 209 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 66 claims were for opioids.
Most prescribed
- Letrozole69 claims
- Tamoxifen Citrate49 claims
- Anastrozole46 claims
- Ondansetron Hcl43 claims
- Prednisone35 claims
- Prochlorperazine Maleate30 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): 86.1 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: $99.94
5 payments; by number, the most common kind was food and beverage; the largest payer was Merck Sharp & Dohme LLC. 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
- The Regents OF The University OF CaliforniaSanta Monica, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Erin Chamberlain among 1,583 hematology & oncology physician records in California
Erin Chamberlain, 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 2013, is newer than 79% of them.
- NPI issued2013 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2013 · median 2003 among the 1,124 with a school on file
- Record last updated2023 · 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 San Luis Obispo → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Gorgun Akpek, M.D., M.H.S.San Luis Obispo, CA 934011124068515
- Joseph ClevelandSan Luis Obispo, CA 934011992209381
- Brian Dicarlo, MDSan Luis Obispo, CA 934011982728796
- Gary Harkins, M.D.San Luis Obispo, CA 934011942204375
- David Harrison, M.D.San Luis Obispo, CA 934011346265436
- Daniel Lewis, M.D.San Luis Obispo, CA 934011598749079
- Levanto Schachter, D.O.San Luis Obispo, CA 934011093031668
- Lin Soe, MBBS, MPH, TMSan Luis Obispo, CA 934011467524900
Common questions
What is Erin Chamberlain, M.D.'s NPI number?
Erin Chamberlain, M.D.'s National Provider Identifier (NPI) is 1902249469, issued on Apr 15, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Erin Chamberlain, M.D. located?
The NPPES record lists a practice address at 892 Aerovista PL Ste 240, San Luis Obispo, CA, 93401. Phone: (805) 543-8252. Providers update this record themselves, so call before visiting.
How can I verify Erin Chamberlain, M.D.'s license?
NPPES lists California license number A142151, 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 Erin Chamberlain, M.D. prescribe under Medicare Part D?
In 2024, Erin Chamberlain, M.D. had 867 Medicare Part D claims for 209 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Erin Chamberlain, M.D.'s MIPS final score?
The 2023 MIPS final score is 86.1 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.