Alexander Chen, MD
NPI 1881802783 · Pulmonary Disease Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Chen, MD is a Pulmonary Disease Physician provider in Saint Louis, MO (NPI 1881802783).
Provider details
- NPI number
- 1881802783
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2004016896 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
352 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 66 | $205 |
| Needle Biopsy of Windpipe Cartilage, Airway, And/Or Lung Using an Endoscope31629 | 44 | $149 |
| Exam of Lung Airways With Diagnostic Or Therapeutic Procedure on Growths Using an Endoscope and Ultrasound31654 | 44 | $64 |
| Exam of Lung Airways and Sampling of Lymph Nodes Using an Endoscope and Ultrasound Guidance, 1-2 Lymph Nodes31652 | 39 | $209 |
| Use of a Drug to Induce Depression of Consciousness By Physician Performing a Procedure (5 Years Or Older), Initial 15 Minutes99152 | 38 | $12 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$112,880 across 141 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-21
- Last updated
- 2025-04-15
Frequently asked questions
- What is Alexander Chen's NPI number?
- Alexander Chen's National Provider Identifier (NPI) is 1881802783, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Chen's specialty?
- Alexander Chen is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Chen located?
- Alexander Chen's practice location on file with NPPES is 4921 Parkview Pl, Saint Louis, MO 63110-1032.
- What is Alexander Chen's phone number?
- The practice phone number listed in the NPPES registry for Alexander Chen is (314) 454-8917.
- Does Alexander Chen accept Medicare?
- Alexander Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Chen's NPI active?
- Yes — Alexander Chen's NPI (1881802783) is active in the NPPES registry as of the last update on 2025-04-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.