Chloe Atreya, MD, PHD
Medical Oncology Physician · San Francisco, CA
Chloe Atreya, MD, PHD is a medical oncology physician with a practice address in San Francisco, California, and NPI 1326058777, issued on Aug 8, 2006. Check the license (California A104445, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chloe Atreya
- Credential
- MD, PHD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- A104445 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1600 Divisadero St, San Francisco, CA 94115
- Phone
- (415) 353-9888
- Enumerated
- Aug 8, 2006
- Record last updated
- Nov 30, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (415) 353-9931
- Medicare enrollment
- Enrolled (PECOS I20110713000442); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 2005
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1600 Divisadero St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David AlfonRegistered Nurse1558106336
- Betsy Althaus, PHARM.D.Pharmacist1366650657
- Christian Apfel, MD, PHDAnesthesiology Physician1578651105
- Mehrdad Arjomandi, MDCritical Care Medicine (Internal Medicine) Physician1912951153
- Ronald Balassanian, MDAnatomic Pathology & Clinical Pathology Physician1043282379
- Fady BekheetPharmacist1780223131
Verify Chloe Atreya in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A104445Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average medical oncology physician in 2024
190 Medicare Part D claims for 31 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Lonsurf43 claims
- Sunitinib Malate25 claims
- Prochlorperazine Maleate24 claims
- Ondansetron Hcl20 claims
- Eliquis13 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): 74.5 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: $2,898.67
3 payments; by number, the most common kind was food and beverage; the largest payer was F. Hoffmann-La Roche AG. The 3,343 providers of this specialty with any payment received $11,773.47 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 3 group practices
- Regents OF The University OF CaliforniaSan Francisco, CA
- Ucsf Medical Group Business ServicesSan Francisco, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Medical Oncology Physician providers in California
There are 447 medical oncology physician records in California.
Other medical oncology physician records in California
- Donald Abrams, MDSan Francisco, CA1679530018
- Ranjana Advani, MDStanford, CA1639225121
- Kambiz Afrasiabi, M.D.Anaheim, CA1578572368
- Mark Agulnik, MDLos Angeles, CA1164448734
- David Agus, M.D.Los Angeles, CA1356328249
- Weiyun Ai, MDSan Francisco, CA1649346842
- Shafqat Akhtar, MDRed Bluff, CA1700960788
- Luai Al Rabadi, M.D.San Francisco, CA1659637452
- Michael Alexander, MDSanta Cruz, CA1053321760
- Sandra AlgazeLos Angeles, CA1861886707
Common questions
What is Chloe Atreya, MD, PHD's NPI number?
Chloe Atreya, MD, PHD's National Provider Identifier (NPI) is 1326058777, issued on Aug 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Chloe Atreya, MD, PHD located?
The NPPES record lists a practice address at 1600 Divisadero St, San Francisco, CA, 94115. Phone: (415) 353-9888. Providers update this record themselves, so call before visiting.
How can I verify Chloe Atreya, MD, PHD's license?
NPPES lists California license number A104445, 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 Chloe Atreya, MD, PHD prescribe under Medicare Part D?
In 2024, Chloe Atreya, MD, PHD had 190 Medicare Part D claims for 31 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is Chloe Atreya, MD, PHD's MIPS final score?
The 2023 MIPS final score is 74.5 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.