Alexander Chang
NPI 1942705421 · Psychiatry Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Chang is a Psychiatry Physician provider in Chicago, IL (NPI 1942705421).
Provider details
- NPI number
- 1942705421
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 036177755 (IL)
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
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
69 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 44 | $140 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 25 | $102 |
Typical Medicare-allowed amounts for these services range $102–$140 (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 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 161 | 17 |
| Trazodone Hcl | 77 | 18 |
| Buprenorphine Hcl/Naloxone Hclbrand: Buprenorphine-Naloxone | 74 | — |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 62 | 14 |
| Prazosin Hcl | 61 | 16 |
| Escitalopram Oxalate | 60 | 16 |
Practice location
Mailing address
Additional practice locations (1)
- 1 Boston Medical Ctr PlBoston, MA 02118-2908Phone: (617) 414-5245Fax: (617) 414-5520
Registry dates
- Enumerated
- 2018-03-27
- Last updated
- 2026-02-20
- Certified
- 2026-02-20
Frequently asked questions
- What is Alexander Chang's NPI number?
- Alexander Chang's National Provider Identifier (NPI) is 1942705421, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Chang's specialty?
- Alexander Chang is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Chang located?
- Alexander Chang's practice location on file with NPPES is 5841 S Maryland Ave, Chicago, IL 60637-1443.
- What is Alexander Chang's phone number?
- The practice phone number listed in the NPPES registry for Alexander Chang is (888) 824-0200.
- Does Alexander Chang accept Medicare?
- Alexander Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Chang's NPI active?
- Yes — Alexander Chang's NPI (1942705421) is active in the NPPES registry as of the last update on 2026-02-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.