Alexander Zwil, MD
NPI 1861540601 · Psychiatry Physician · Philadelphia, PA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Zwil, MD is a Psychiatry Physician provider in Philadelphia, PA (NPI 1861540601).
Provider details
- NPI number
- 1861540601
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD033807E (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
500 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 238 | $65 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 231 | $99 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 18 | $174 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 13 | $133 |
Typical Medicare-allowed amounts for these services range $65–$174 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 203 | 35 |
| Risperidone | 180 | 29 |
| Lamotrigine | 147 | 24 |
| Sertraline Hcl | 143 | 26 |
| Desvenlafaxine Succinatebrand: Desvenlafaxine Succinate Er | 109 | 18 |
| Escitalopram Oxalate | 106 | 18 |
| Trazodone Hcl | 95 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-08
- Last updated
- 2016-02-01
Frequently asked questions
- What is Alexander Zwil's NPI number?
- Alexander Zwil's National Provider Identifier (NPI) is 1861540601, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Zwil's specialty?
- Alexander Zwil is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Zwil located?
- Alexander Zwil's practice location on file with NPPES is 3535 Market St, Philadelphia, PA 19104-3309.
- What is Alexander Zwil's phone number?
- The practice phone number listed in the NPPES registry for Alexander Zwil is (215) 746-6700.
- Does Alexander Zwil accept Medicare?
- Alexander Zwil is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Zwil's NPI active?
- Yes — Alexander Zwil's NPI (1861540601) is active in the NPPES registry as of the last update on 2016-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.