David A. Horowitz, MD
Hospitalist Physician · Philadelphia, PA
David A. Horowitz, MD is a hospitalist physician with a practice address in Philadelphia, Pennsylvania, and NPI 1679505036, issued on Jul 7, 2006. Check the license (Pennsylvania MD044830L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- David A. Horowitz
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- MD044830L PA
Self-reported in NPPES; status is on the state search - Practice location
- 3701 Market St, Philadelphia, PA 19104
- Phone
- (215) 349-5600
- Enumerated
- Jul 7, 2006
- Record last updated
- Dec 5, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicaid ID
- 0013982120002 PA
- Medicare enrollment
- Enrolled (PECOS I20100323000824); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 1,424 in Pennsylvania → Look up another NPI →
Also registered at 3701 Market St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ayisha Arshad, FNP-BCFamily Nurse Practitioner1811376874
- Michael Baime, MDInternal Medicine Physician1972530871
- Michelle Barcus, CNMAdvanced Practice Midwife1538475124
- Rebecca Berlin, CRNPAdult Health Nurse Practitioner1194832584
Verify David A. Horowitz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD044830LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7.1 times the Medicare Part D claims of the average hospitalist physician in 2024
3,716 Medicare Part D claims for 352 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 62 claims were for opioids.
Most prescribed
- Amlodipine Besylate357 claims
- Atorvastatin Calcium316 claims
- Levothyroxine Sodium174 claims
- Rosuvastatin Calcium139 claims
- Omeprazole134 claims
- Hydrochlorothiazide131 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 3 group practices
- Novacare Outpatient Rehabilitation East, Inc.Collegeville, PA
- Trustees OF The University OF PennsylvaniaPhiladelphia, PA
- University OF Penn - Medical GroupPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David A. Horowitz among 1,424 hospitalist physician records in Pennsylvania
David A. Horowitz, MD is one of 1,424 hospitalist physician records with a practice address in Pennsylvania. 94% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 83% newer
- In a Medicare fileYes · 94% of these records are
- In the CMS Doctors and Clinicians fileYes · 87% of these records are
- Graduated1989 · median 2011 among the 1,236 with a school on file
- Record last updated2017 · 36% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Pennsylvania
There are 1,424 hospitalist physician records in Pennsylvania.
All 1,424 in Pennsylvania → Every provider in Philadelphia → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Susan Day, MDPhiladelphia, PA 191041992737290
- Carmen Guerra, MDPhiladelphia, PA 191041356373781
- Todd Hecht, MDPhiladelphia, PA 191041841227014
- Michelle Hu, MDPhiladelphia, PA 191041891721593
- Emmanuel King, MDPhiladelphia, PA 191041598753469
- Laura Kosseim, MDPhiladelphia, PA 191041912933607
- Philip Masters, MDPhiladelphia, PA 191041265481634
- John McGreevey, MDPhiladelphia, PA 191041033157326
Common questions
What is David A. Horowitz, MD's NPI number?
David A. Horowitz, MD's National Provider Identifier (NPI) is 1679505036, issued on Jul 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David A. Horowitz, MD located?
The NPPES record lists a practice address at 3701 Market St, Philadelphia, PA, 19104. Phone: (215) 349-5600. Providers update this record themselves, so call before visiting.
How can I verify David A. Horowitz, MD's license?
NPPES lists Pennsylvania license number MD044830L, 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 David A. Horowitz, MD prescribe under Medicare Part D?
In 2024, David A. Horowitz, MD had 3,716 Medicare Part D claims for 352 beneficiaries; the average among hospitalist physician prescribers was 521. 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.