Michael Tennysen, RN
NPI 1225522956 · Certified Registered Nurse Anesthetist · Warsaw, NY
Enrolled with Medicare as Practitioner - Certified Registered Nurse Anesthetist (crna) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Tennysen, RN is a Certified Registered Nurse Anesthetist provider in Warsaw, NY (NPI 1225522956).
Provider details
- NPI number
- 1225522956
- Entity type
- Individual
- Primary specialty
- Certified Registered Nurse AnesthetistPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- RN
- Sex
- Male
- Sole proprietor
- No
- License
- 666795 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 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
64 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 | 25 | $120 |
| Anesthesia for Exam of Colon Using an Endoscope00812 | 23 | $93 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 16 | $119 |
Typical Medicare-allowed amounts for these services range $93–$120 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-06-16
- Last updated
- 2024-03-01
- Certified
- 2024-03-01
Frequently asked questions
- What is Michael Tennysen's NPI number?
- Michael Tennysen's National Provider Identifier (NPI) is 1225522956, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Tennysen's specialty?
- Michael Tennysen is listed in the NPPES registry with a primary specialty of Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Michael Tennysen located?
- Michael Tennysen's practice location on file with NPPES is 400 N Main St, Warsaw, NY 14569-1025.
- What is Michael Tennysen's phone number?
- The practice phone number listed in the NPPES registry for Michael Tennysen is (585) 786-2233.
- Does Michael Tennysen accept Medicare?
- Michael Tennysen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Tennysen's NPI active?
- Yes — Michael Tennysen's NPI (1225522956) is active in the NPPES registry as of the last update on 2024-03-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.