Karen A. Chojnacki, M.D.
Surgery Physician · Philadelphia, PA
Karen A. Chojnacki, M.D. is a surgery physician with a practice address in Philadelphia, Pennsylvania, and NPI 1083630685, issued on Jul 15, 2006. Check the license (Pennsylvania MD062646L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Karen A. Chojnacki
- Credential
- M.D.
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- MD062646L PA
Self-reported in NPPES; status is on the state search - Practice location
- 1100 Walnut St, Philadelphia, PA 19107
- Phone
- (215) 955-6750
- Enumerated
- Jul 15, 2006
- Record last updated
- Feb 18, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (215) 923-8222
- Medicaid IDs
- 8954305 NJ
001918279 PA - Medicare enrollment
- Enrolled (PECOS I20041119000501); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 1,867 in Pennsylvania → Look up another NPI →
Also registered at 1100 Walnut St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alec Beekley, M.D.Trauma Surgery Physician1104880970
- Kylie Borden, MSGCGenetic Counselor (M.S.)1306517099
- George Bradford, M.D.Family Medicine Physician1558330324
- Shawnna Cannaday, APNFamily Nurse Practitioner1316225857
- Maryalice Cheney, M.D.Colon & Rectal Surgery Physician1952464877
- Murray Cohen, M.D.Trauma Surgery Physician1548280217
Verify Karen A. Chojnacki in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD062646LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average surgery physician in 2024
28 Medicare Part D claims for 19 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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: $129.17
1 payment: food and beverage; the largest payer was Boston Scientific Corporation. The 17,103 providers of this specialty with any payment received $3,513.80 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
- Jefferson University PhysiciansPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen A. Chojnacki among 1,867 surgery physician records in Pennsylvania
Karen A. Chojnacki, M.D. is one of 1,867 surgery physician records with a practice address in Pennsylvania. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 64% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1995 · median 2007 among the 932 with a school on file
- Record last updated2014 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in Pennsylvania
There are 1,867 surgery physician records in Pennsylvania.
All 1,867 in Pennsylvania → Every provider in Philadelphia → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- George Amrom, MDPhiladelphia, PA 191071104879048
- Wilbur Bowne, M.D.Philadelphia, PA 191071790762516
- William Hughes, MDPhiladelphia, PA 191071447206867
- John Kairys, M.D.Philadelphia, PA 191071043230733
- Kris Kaulback, M.D.Philadelphia, PA 191071245250943
- Eugene Kennedy, M.D.Philadelphia, PA 191071902826274
- Susanna Nazarian, M.D., PH.D.Philadelphia, PA 191071558414011
- Hooman Noorchashm, MDPhiladelphia, PA 191071053463885
Common questions
What is Karen A. Chojnacki, M.D.'s NPI number?
Karen A. Chojnacki, M.D.'s National Provider Identifier (NPI) is 1083630685, issued on Jul 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen A. Chojnacki, M.D. located?
The NPPES record lists a practice address at 1100 Walnut St, Philadelphia, PA, 19107. Phone: (215) 955-6750. Providers update this record themselves, so call before visiting.
How can I verify Karen A. Chojnacki, M.D.'s license?
NPPES lists Pennsylvania license number MD062646L, 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 Karen A. Chojnacki, M.D. prescribe under Medicare Part D?
In 2024, Karen A. Chojnacki, M.D. had 28 Medicare Part D claims for 19 beneficiaries; the average among surgery physician prescribers was 147. 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.