John Nikolai
NPI 1124794821 · Certified Registered Nurse Anesthetist · Nashville, TN
Enrolled with Medicare as Practitioner - Certified Registered Nurse Anesthetist (crna) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Nikolai is a Certified Registered Nurse Anesthetist provider in Nashville, TN (NPI 1124794821).
Provider details
- NPI number
- 1124794821
- Entity type
- Individual
- Primary specialty
- Certified Registered Nurse AnesthetistPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- 216345 (TN)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
4 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
168 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 X-Ray on Heart Vessels and Chambers01920 | 58 | $192 |
| Anesthesia for Procedure to Assess Heart Electrical Activity00537 | 18 | $183 |
| Anesthesia for X-Ray Or Radiation Therapy01922 | 17 | $115 |
| Anesthesia for X-Ray on Artery of Neck Or Heart01925 | 17 | $223 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 16 | $96 |
| Anesthesia for X-Ray on Artery of Brain, Heart, Or Chest01926 | 15 | $135 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-08-22
- Last updated
- 2023-02-01
- Certified
- 2023-02-01
Frequently asked questions
- What is John Nikolai's NPI number?
- John Nikolai's National Provider Identifier (NPI) is 1124794821, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Nikolai's specialty?
- John Nikolai is listed in the NPPES registry with a primary specialty of Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is John Nikolai located?
- John Nikolai's practice location on file with NPPES is 4230 Harding Pike, Nashville, TN 37205-2013.
- What is John Nikolai's phone number?
- The practice phone number listed in the NPPES registry for John Nikolai is (615) 385-3704.
- Does John Nikolai accept Medicare?
- John Nikolai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Nikolai's NPI active?
- Yes — John Nikolai's NPI (1124794821) is active in the NPPES registry as of the last update on 2023-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.