Karen P. Zimmer, MD
Pediatrics Physician · Philadelphia, PA
Karen P. Zimmer, MD is a pediatrics physician with a practice address in Philadelphia, Pennsylvania, and NPI 1720016322, issued on Jun 30, 2006. Check the license (Pennsylvania MD428886, as entered in NPPES) on the Pennsylvania Department of State (PALS); the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Karen P. Zimmer
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License numbers
- MD428886 PA
D56990 MD
Self-reported in NPPES; status is on the state search - Practice location
- 833 Chestnut Street, Philadelphia, PA 19107
- Phone
- (215) 955-7800
- Enumerated
- Jun 30, 2006
- Record last updated
- Oct 5, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (215) 923-4267
- Medicaid ID
- 699236600 MD
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 3,382 in Pennsylvania → Look up another NPI →
Also registered at 833 Chestnut Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Janis Bonat, CRNPFamily Nurse Practitioner1154434702
- Yasmin Brahmbhatt, MDNephrology Physician1891967006
Verify Karen P. Zimmer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD428886Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Karen P. Zimmer among 3,382 pediatrics physician records in Pennsylvania
Karen P. Zimmer, MD is one of 3,382 pediatrics physician records with a practice address in Pennsylvania. 25% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 58% newer
- In a Medicare fileNo · 25% of these records are
- In the CMS Doctors and Clinicians fileNo · 7% of these records are
- Record last updated2011 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,153 pediatrics physician records list a practice address in Philadelphia
They are 1,153 of the 42,849 NPPES records with a practice address in Philadelphia, and 3,382 pediatrics physician records in Pennsylvania. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,382 in Pennsylvania → Every provider in Philadelphia → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Dona Chen, M.D.Philadelphia, PA 191071013944321
- Janet Crino, MDPhiladelphia, PA 191071427096965
- Shea Cronley, MDPhiladelphia, PA 191071558302554
- Hiewon Hann, M.D.Phila, PA 191071265491419
- Cynthia Hill, MDPhiladelphia, PA 191071235170226
- Barbara Homeier, MDPhiladelphia, PA 191071811046204
- Lisa Knoflicek, MDPhiladelphia, PA 191071720184807
- William McNett, MDPhiladelphia, PA 191071366581159
Common questions
What is Karen P. Zimmer, MD's NPI number?
Karen P. Zimmer, MD's National Provider Identifier (NPI) is 1720016322, issued on Jun 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen P. Zimmer, MD located?
The NPPES record lists a practice address at 833 Chestnut Street, Philadelphia, PA, 19107. Phone: (215) 955-7800. Providers update this record themselves, so call before visiting.
How can I verify Karen P. Zimmer, MD's license?
NPPES lists Pennsylvania license number MD428886, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.