William Joseph Chapin, MD
Hematology & Oncology Physician · Philadelphia, PA
William Joseph Chapin, MD is a hematology & oncology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1316309578, issued on Mar 25, 2016. Check the license (Pennsylvania MD470979, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- William Joseph Chapin
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- MD470979 PA
Self-reported in NPPES; status is on the state search - Practice location
- 3400 Civic Center Blvd, Philadelphia, PA 19104
- Phone
- (215) 615-0063
- Enumerated
- Mar 25, 2016
- Record last updated
- Dec 8, 2022
- Fax
- (215) 349-8144
- Medicare enrollment
- Enrolled (PECOS I20220708003245); accepts Medicare assignment
- Medical or professional school
- University Of Chicago, Pritzker School Of Medicine, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 784 in Pennsylvania → Look up another NPI →
Also registered at 3400 Civic Center Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Charu Aggarwal, MD, MPHHematology & Oncology Physician1114181740
Verify William Joseph Chapin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD470979Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
200 Medicare Part D claims for 43 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 37 claims were for opioids.
Most prescribed
- Oxycodone Hcl32 claims
- Ondansetron Hcl24 claims
- Prochlorperazine Maleate19 claims
- Loperamide15 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): 85.5 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: $115.06
1 payment: food and beverage; the largest payer was Intera Oncology, 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.
Bills Medicare through one group practice
- University OF Penn - Medical GroupPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Joseph Chapin among 784 hematology & oncology physician records in Pennsylvania
William Joseph Chapin, MD is one of 784 hematology & oncology physician records with a practice address in Pennsylvania. 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 2016, is newer than 82% of them.
- NPI issued2016 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2016 · median 2004 among the 553 with a school on file
- Record last updated2022 · 60% 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 Pennsylvania 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 Pennsylvania
There are 784 hematology & oncology physician records in Pennsylvania.
All 784 in Pennsylvania → Every provider in Philadelphia → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Roger Cohen, MDPhiladelphia, PA 191041639146939
- Nevena Damjanov, MDPhiladelphia, PA 191041518954395
- Andrew Dancis, MDPhiladelphia, PA 191041316988249
- Arthur Feldman, MDPhiladelphia, PA 191041518966357
- Patrick Fogarty, MDPhiladelphia, PA 191041528016052
- Steven Freedman, M.D./PH.D.Philadelphia, PA 191041417932757
- Alison Loren, MDPhiladelphia, PA 191041942241641
- Carlos Madamba, MDPhiladelphia, PA 191041811994866
Common questions
What is William Joseph Chapin, MD's NPI number?
William Joseph Chapin, MD's National Provider Identifier (NPI) is 1316309578, issued on Mar 25, 2016. An NPI identifies a provider in billing; it is not a license.
Where is William Joseph Chapin, MD located?
The NPPES record lists a practice address at 3400 Civic Center Blvd, Philadelphia, PA, 19104. Phone: (215) 615-0063. Providers update this record themselves, so call before visiting.
How can I verify William Joseph Chapin, MD's license?
NPPES lists Pennsylvania license number MD470979, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Joseph Chapin, MD prescribe under Medicare Part D?
In 2024, William Joseph Chapin, MD had 200 Medicare Part D claims for 43 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is William Joseph Chapin, MD's MIPS final score?
The 2023 MIPS final score is 85.5 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.