Nicholas Kiefer, M.D.
NPI 1861849531 · Cardiovascular Disease Physician · New York, NY
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Kiefer, M.D. is a Cardiovascular Disease Physician provider in New York, NY (NPI 1861849531).
Provider details
- NPI number
- 1861849531
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 297705 (NY)
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
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
80 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 | 60 | $232 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 20 | $86 |
Typical Medicare-allowed amounts for these services range $86–$232 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$134 across 5 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
Additional practice locations (1)
- 330 Brookline AveBoston, MA 02215-5400Phone: (617) 667-7000
Registry dates
- Enumerated
- 2016-05-23
- Last updated
- 2023-09-19
- Certified
- 2023-09-19
Frequently asked questions
- What is Nicholas Kiefer's NPI number?
- Nicholas Kiefer's National Provider Identifier (NPI) is 1861849531, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Kiefer's specialty?
- Nicholas Kiefer is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Kiefer located?
- Nicholas Kiefer's practice location on file with NPPES is 550 1st Ave Fl 14, New York, NY 10016-6402.
- What is Nicholas Kiefer's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Kiefer is (212) 263-0855.
- Does Nicholas Kiefer accept Medicare?
- Nicholas Kiefer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Kiefer's NPI active?
- Yes — Nicholas Kiefer's NPI (1861849531) is active in the NPPES registry as of the last update on 2023-09-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.