John William Kunstman, MD
Surgical Oncology Physician · New Haven, CT
John William Kunstman, MD is a surgical oncology physician with a practice address in New Haven, Connecticut, and NPI 1265666184, issued on May 6, 2009. Check the license (Connecticut 61821, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John William Kunstman
- Credential
- MD
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License number
- 61821 CT
Self-reported in NPPES; status is on the state search - Practice location
- 20 York St # T-209, New Haven, CT 06510
- Phone
- (203) 688-2259
- Enumerated
- May 6, 2009
- Record last updated
- Aug 29, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (203) 688-5599
- Medicare enrollment
- Enrolled (PECOS I20180913000934); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2009
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest surgical oncology physician records → All 38 in Connecticut → Look up another NPI →
Also registered at 20 York St # T-209
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John William Kunstman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 61821Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average surgical oncology physician in 2024
35 Medicare Part D claims for 12 beneficiaries, against an average of 87 among the 1,237 providers of this specialty who prescribed in Part D. Brand-name drugs were 83% of claims.
Most prescribed
- Creon25 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): 73.6 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).
Bills Medicare through one group practice
- Yale UniversityNew Haven, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John William Kunstman among 38 surgical oncology physician records in Connecticut
John William Kunstman, MD is one of 38 surgical oncology physician records with a practice address in Connecticut. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 74% of them.
- NPI issued2009 · 74% of these records are older, 18% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2009 · median 2002 among the 27 with a school on file
- Record last updated2018 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086X0206X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Oncology Physician providers in Connecticut
There are 38 surgical oncology physician records in Connecticut.
All 38 in Connecticut → Every provider in New Haven → Surgical Oncology Physician nationwide →
The 8 surgical oncology physician records with the nearest ZIP codes
- Kevin Billingsley, MDNew Haven, CT 065101346258803
- Tristen Park, MDNew Haven, CT 065101295062081
- Gregory Zanieski, MDNew Haven, CT 065101235320474
- Joshua Bleicher, M.D.New Haven, CT 065191871957720
- Vera Hendrix, M.D.New Haven, CT 065191225490931
- Isaac Kim, MD, PHDNew Haven, CT 065191235217985
- Sung Kwon, M.D.New Haven, CT 065191447458484
- Donald Lannin, MDNew Haven, CT 065191972587830
Common questions
What is John William Kunstman, MD's NPI number?
John William Kunstman, MD's National Provider Identifier (NPI) is 1265666184, issued on May 6, 2009. An NPI identifies a provider in billing; it is not a license.
Where is John William Kunstman, MD located?
The NPPES record lists a practice address at 20 York St # T-209, New Haven, CT, 06510. Phone: (203) 688-2259. Providers update this record themselves, so call before visiting.
How can I verify John William Kunstman, MD's license?
NPPES lists Connecticut license number 61821, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John William Kunstman, MD prescribe under Medicare Part D?
In 2024, John William Kunstman, MD had 35 Medicare Part D claims for 12 beneficiaries; the average among surgical oncology physician prescribers was 87. Part D covers Medicare prescriptions only.
What is John William Kunstman, MD's MIPS final score?
The 2023 MIPS final score is 73.6 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.