Chi-Joan How
Medical Oncology Physician · Boston, MA
Chi-Joan How is a medical oncology physician with a practice address in Boston, Massachusetts, and NPI 1841671765, issued on Jun 16, 2015. Check the license (Massachusetts 274726, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Chi-Joan How
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License numbers
- 274726 MA
279411 MA
2015017268 MO
Self-reported in NPPES; status is on the state search - Practice location
- 450 Brookline Ave, Boston, MA 02215
- Phone
- (617) 632-3779
- Enumerated
- Jun 16, 2015
- Record last updated
- Mar 3, 2026
- Fax
- (617) 632-5822
- Medicare enrollment
- Enrolled (PECOS I20210611001922); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 2015
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 421 in Massachusetts → Look up another NPI →
Also registered at 450 Brookline Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gregory Abel, MDHematology & Oncology Physician1285611954
- Lara Abousamra, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1851183404
- Karley Adams, PAPhysician Assistant1578261764
- Lauren Adams, PA-CPhysician Assistant1902763469
- Ana Aguilar-Bonilla, M.D.Pediatric Hematology & Oncology Physician1023319761
- Andrew Aguirre, MD, PHDMedical Oncology Physician1609071208
Verify Chi-Joan How in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 274726Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% fewer Medicare Part D claims than the average medical oncology physician in 2024
314 Medicare Part D claims for 79 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 49% of claims.
Most prescribed
- Hydroxyurea134 claims
- Xarelto46 claims
- Eliquis45 claims
- Jakafi39 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: $4,730.00
2 payments; by number, the most common kind was honoraria; the largest payer was PharmaEssentia USA Corporation. 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 2 group practices
- Brigham And Womens Physicians Organization IncBoston, MA
- Dana-Farber Cancer Institute, Inc.Boston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chi-Joan How among 421 medical oncology physician records in Massachusetts
Chi-Joan How is one of 421 medical oncology physician records with a practice address in Massachusetts. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 76% of them.
- NPI issued2015 · 76% of these records are older, 20% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2015 · median 2007 among the 291 with a school on file
- Record last updated2026 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in Massachusetts
There are 421 medical oncology physician records in Massachusetts.
All 421 in Massachusetts → Every provider in Boston → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Steven Come, M.D.Boston, MA 022151619940137
- David D'Adamo, MDBoston, MA 022151295706224
- George Demetri, MDBoston, MA 022151841267093
- William Hahn, MD PHDBoston, MA 022151457313652
- Joseph Jacobson, MDBoston, MA 022151942282041
- Bruce Johnson, MDBoston, MA 022151578523866
- Robert Mayer, MDBoston, MA 022151659361327
- Erica Mayer, MD MPHBoston, MA 022151336121789
Common questions
What is Chi-Joan How's NPI number?
Chi-Joan How's National Provider Identifier (NPI) is 1841671765, issued on Jun 16, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Chi-Joan How located?
The NPPES record lists a practice address at 450 Brookline Ave, Boston, MA, 02215. Phone: (617) 632-3779. Providers update this record themselves, so call before visiting.
How can I verify Chi-Joan How's license?
NPPES lists Massachusetts license number 274726, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Chi-Joan How prescribe under Medicare Part D?
In 2024, Chi-Joan How had 314 Medicare Part D claims for 79 beneficiaries; the average among medical oncology physician prescribers was 703. 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.