Registry data as of Aug 27, 2026

Alexander Zwil, MD

Geriatric Psychiatry Physician · Philadelphia, PA

Alexander Zwil, MD is a geriatric psychiatry physician with a practice address in Philadelphia, Pennsylvania, and NPI 1861540601, issued on Jan 8, 2007. Check the license on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.

Record from CMS NPPES, loaded Aug 27, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1861540601
Name
Alexander Zwil
Credential
MD
Primary taxonomy
Geriatric Psychiatry Physician 2084P0805X
Practice location
3535 Market St, Philadelphia, PA 19104
Phone
(215) 746-6700
Enumerated
Jan 8, 2007
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 3535 Market St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Kelly Allison, PHDPsychologist1336466325
  2. Jay Amsterdam, MDPsychiatry Physician1982636320
  3. Joy Anderson, NPPsychiatric/Mental Health Nurse Practitioner1588231047
  4. Steven Arnold, MDNeurology Physician1437186327
  5. Brooke Bailer, PHDPsychologist1457607855
  6. Claudia Baldassano, MDPsychiatry Physician1598772048

Verify Alexander Zwil in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersPennsylvania Department of State (PALS)Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Open the Pennsylvania license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

47% more Medicare Part D claims than the average geriatric psychiatry physician in 2024

2,327 Medicare Part D claims for 153 beneficiaries, against an average of 1,586 among the 507 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims.

  1. Alexander Zwil2,327
  2. Specialty average1,586

Most prescribed

  1. Quetiapine Fumarate203 claims
  2. Risperidone180 claims
  3. Lamotrigine147 claims
  4. Sertraline Hcl143 claims
  5. Desvenlafaxine Succinate Er109 claims
  6. Escitalopram Oxalate106 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 practice group's Medicare quality score for 2023: 85.5 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualityout of 100 · 30% of the final score73.6
  2. Costout of 100 · 30%
  3. Promoting interoperabilityout of 100 · 25%100.0
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

One hospital or facility affiliation

  1. University OF Penn - Medical GroupPhiladelphia, PA

Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Geriatric Psychiatry Physician providers in Pennsylvania

There are 38 geriatric psychiatry physician records in Pennsylvania.

Other geriatric psychiatry physician records in Pennsylvania

  1. Satish Amirneni, MDClearfield, PA1114025558
  2. Ashok Bharucha, MDSouth Abington Township, PA1932171071
  3. Indranil Chakrabarti, M.D.Chambersburg, PA1457302143
  4. Patrick Ciccone, M.D.Philadelphia, PA1457691628
  5. Bohdan Doberczak, M.D.Elkins Park, PA1336225630
  6. Bijan Etemad, M.D.Villanova, PA1124253067
  7. Alexandra Fortunato, DOPittsburgh, PA1447747043
  8. Marie Anne Gebara, M.DPittsburgh, PA1477868057
  9. Marian Georgiev, MDReading, PA1407099096
  10. Susan Gilman, M.D.Wynnewood, PA1619986148

Common questions

What is Alexander Zwil, MD's NPI number?

Alexander Zwil, MD's National Provider Identifier (NPI) is 1861540601, issued on Jan 8, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Alexander Zwil, MD located?

The NPPES record lists a practice address at 3535 Market St, Philadelphia, PA, 19104. Phone: (215) 746-6700. Providers update this record themselves, so call before visiting.

How can I verify Alexander Zwil, MD's license?

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 Alexander Zwil, MD prescribe under Medicare Part D?

In 2024, Alexander Zwil, MD had 2,327 Medicare Part D claims for 153 beneficiaries; the average among geriatric psychiatry physician prescribers was 1,586. Part D covers Medicare prescriptions only.

What is Alexander Zwil, MD's Medicare quality score?

The 2023 MIPS final score is 85.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.