Alexander Nelken, M.D.
NPI 1619142882 · Anesthesiology Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Nelken, M.D. is a Anesthesiology Physician provider in Brooklyn, NY (NPI 1619142882).
Provider details
- NPI number
- 1619142882
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 245108 (NY)
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
18 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
484 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) |
|---|---|---|
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 116 | $136 |
| Anesthesia for Exam of Colon Using an Endoscope00812 | 109 | $118 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 86 | $142 |
| Anesthesia for Procedure on Small and Large Bowel Using an Endoscope00813 | 35 | $161 |
| Anesthesia for Lens Surgery00142 | 33 | $109 |
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 30 | $127 |
Practice location
Mailing address
Additional practice locations (1)
- 100 North Academy Ave.Danville, PA 17822-2025Phone: (570) 271-6621Fax: (570) 271-6762
Registry dates
- Enumerated
- 2008-04-28
- Last updated
- 2022-08-19
- Certified
- 2022-08-17
Frequently asked questions
- What is Alexander Nelken's NPI number?
- Alexander Nelken's National Provider Identifier (NPI) is 1619142882, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Nelken's specialty?
- Alexander Nelken is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Nelken located?
- Alexander Nelken's practice location on file with NPPES is 450 Clarkson Ave, Brooklyn, NY 11203-2012.
- What is Alexander Nelken's phone number?
- The practice phone number listed in the NPPES registry for Alexander Nelken is (718) 270-1000.
- Does Alexander Nelken accept Medicare?
- Alexander Nelken is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Nelken's NPI active?
- Yes — Alexander Nelken's NPI (1619142882) is active in the NPPES registry as of the last update on 2022-08-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.