Jennifer S. Nizen, MD
Internal Medicine Physician · Philadelphia, PA
Jennifer S. Nizen, MD is an internal medicine physician with a practice address in Philadelphia, Pennsylvania, and NPI 1689604746, issued on Jul 4, 2006. Check the license (Pennsylvania MD046562L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Jennifer S. Nizen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD046562L PA
Self-reported in NPPES; status is on the state search - Practice location
- 601 Walnut St, Philadelphia, PA 19106
- Phone
- (215) 829-0101
- Enumerated
- Jul 4, 2006
- Record last updated
- Nov 1, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (215) 829-4349
- Medicaid ID
- 0012803930007 PA
- Medicare enrollment
- Enrolled (PECOS I20100326000573); accepts Medicare assignment
- 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 601 Walnut St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jennifer S. Nizen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD046562LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% more Medicare Part D claims than the average internal medicine physician in 2024
5,908 Medicare Part D claims for 538 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 39 claims were for opioids.
Most prescribed
- Amlodipine Besylate389 claims
- Rosuvastatin Calcium363 claims
- Atorvastatin Calcium345 claims
- Levothyroxine Sodium207 claims
- Losartan Potassium196 claims
- Hydrochlorothiazide163 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.
Bills Medicare through one group practice
- Clinical Care Associates OF The University OF Pennsylvania Health.Philadelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jennifer S. Nizen among 7,300 internal medicine physician records in Pennsylvania
Jennifer S. Nizen, 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
- Graduated1989 · median 2008 among the 4,208 with a school on file
- Record last updated2012 · 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).
1,855 internal medicine physician records list a practice address in Philadelphia
They are 1,855 of the 42,849 NPPES records with a practice address in Philadelphia, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Philadelphia → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Dennis Policastro, MDPhiladelphia, PA 191061104844497
Common questions
What is Jennifer S. Nizen, MD's NPI number?
Jennifer S. Nizen, MD's National Provider Identifier (NPI) is 1689604746, issued on Jul 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer S. Nizen, MD located?
The NPPES record lists a practice address at 601 Walnut St, Philadelphia, PA, 19106. Phone: (215) 829-0101. Providers update this record themselves, so call before visiting.
How can I verify Jennifer S. Nizen, MD's license?
NPPES lists Pennsylvania license number MD046562L, 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 Jennifer S. Nizen, MD prescribe under Medicare Part D?
In 2024, Jennifer S. Nizen, MD had 5,908 Medicare Part D claims for 538 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.