Karl A. Zimmerman, MD
Internal Medicine Physician · Kennett Square, PA
Karl A. Zimmerman, MD is an internal medicine physician with a practice address in Kennett Square, Pennsylvania, and NPI 1154439966, issued on Aug 29, 2006. Check the license (Pennsylvania MD056655L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Karl A. Zimmerman
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD056655L PA
Self-reported in NPPES; status is on the state search - Practice location
- 127 W Street RD, Kennett Square, PA 19348
- Phone
- (610) 444-1212
- Enumerated
- Aug 29, 2006
- Record last updated
- Jul 10, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (610) 444-3633
- Medicare enrollment
- Enrolled (PECOS I20110527000045); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 127 W Street RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Linda Brodeur-Cangi, MSW, LSWMental Health Counselor1760781777
- Margaret Dorgan, M.S.S.Clinical Social Worker1174637763
- Jeffrey Hendrix, DDS, MSOrthodontics and Dentofacial Orthopedics Dentistry1275636151
- Edward Jenny, PSY.D.Clinical Psychologist1508996992
- Michele Zimmerman, C.R.N.P.Primary Care Nurse Practitioner1730332768
Verify Karl A. Zimmerman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD056655LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average internal medicine physician in 2024
8,137 Medicare Part D claims for 712 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 112 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium732 claims
- Amlodipine Besylate475 claims
- Levothyroxine Sodium413 claims
- Losartan Potassium287 claims
- Atorvastatin Calcium257 claims
- Metoprolol Succinate222 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 MIPS final score for 2023 (Medicare payment program): 62 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $89.88
4 payments; by number, the most common kind was food and beverage; the largest payer was Exact Sciences Corporation. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Phoenix Rehabilitation And Health Services IncCranberry Twp, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karl A. Zimmerman among 7,300 internal medicine physician records in Pennsylvania
Karl A. Zimmerman, MD is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 78% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 64% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1993 · median 2008 among the 4,208 with a school on file
- Record last updated2015 · 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 207R00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 internal medicine physician records list a practice address in Kennett Square
They are 8 of the 625 NPPES records with a practice address in Kennett Square, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Kennett Square → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Paula Barry, MDKennett Square, PA 193481578661898
- Glea Mazzuca, D.OKennett Square, PA 193481376803502
- Matthew Ochs, M.D.Kennett Square, PA 193481043203151
- Ekinadose OniKennett Square, PA 193481760007942
- Uzma Quraishi, MDKennett Square, PA 193481750390340
- Susan Ricciardi, M.D.Kennett Square, PA 193481326126277
- Deepika Suri, M.D.Kennett Square, PA 193481760424220
- Michael Jan, MD, PHD, MPHHoney Brook, PA 193441508277211
Common questions
What is Karl A. Zimmerman, MD's NPI number?
Karl A. Zimmerman, MD's National Provider Identifier (NPI) is 1154439966, issued on Aug 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karl A. Zimmerman, MD located?
The NPPES record lists a practice address at 127 W Street RD, Kennett Square, PA, 19348. Phone: (610) 444-1212. Providers update this record themselves, so call before visiting.
How can I verify Karl A. Zimmerman, MD's license?
NPPES lists Pennsylvania license number MD056655L, 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 Karl A. Zimmerman, MD prescribe under Medicare Part D?
In 2024, Karl A. Zimmerman, MD had 8,137 Medicare Part D claims for 712 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Karl A. Zimmerman, MD's MIPS final score?
The 2023 MIPS final score is 62 of 100. 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.