Frederick Nahm, MD
NPI 1548242647 · Neurology Physician · Greenwich, CT
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Frederick Nahm, MD is a Neurology Physician provider in Greenwich, CT (NPI 1548242647).
Provider details
- NPI number
- 1548242647
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 040098 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Technologists, Technicians & Other Technical Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
3,185 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) |
|---|---|---|
| Continuous Intraoperative Neurophysiology Monitoring, From Outside the Operating Room (remote Or Nearby), Per Patient, (attention Directed Exclusively to One Patient) Each 15 Minutes (list in Addition to Primary Procedure)G0453 | 1,195 | $33 |
| Placement of Skin Electrodes and Measurement of Stimulated Sites on Arms and Legs95938 | 787 | $46 |
| Needle Measurement of Electrical Activity in Arm Or Leg Muscles, 2 Extremities95861 | 547 | $82 |
| Placement of Skin Electrodes and Measurement of Central Motor Stimulation in Arms and Legs95939 | 390 | $119 |
| Needle Measurement of Electrical Activity in Arm, Leg, Trunk Or Head Muscles, Limited Study95870 | 174 | $20 |
| Measurement of Brain Wave Activity (eeg) Outside the Brain During Surgery |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-16
- Last updated
- 2024-01-24
- Certified
- 2024-01-24
Frequently asked questions
- What is Frederick Nahm's NPI number?
- Frederick Nahm's National Provider Identifier (NPI) is 1548242647, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frederick Nahm's specialty?
- Frederick Nahm is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Frederick Nahm located?
- Frederick Nahm's practice location on file with NPPES is 24 Home Pl, Greenwich, CT 06830-7106.
- What is Frederick Nahm's phone number?
- The practice phone number listed in the NPPES registry for Frederick Nahm is (203) 661-9383.
- Does Frederick Nahm accept Medicare?
- Frederick Nahm is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Frederick Nahm's NPI active?
- Yes — Frederick Nahm's NPI (1548242647) is active in the NPPES registry as of the last update on 2024-01-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.