Larson Greenfield, RN
NPI 1366045577 · Certified Registered Nurse Anesthetist · Fort Collins, CO
Enrolled with Medicare as Practitioner - Certified Registered Nurse Anesthetist (crna) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Larson Greenfield, RN is a Certified Registered Nurse Anesthetist provider in Fort Collins, CO (NPI 1366045577).
Provider details
- NPI number
- 1366045577
- Entity type
- Individual
- Primary specialty
- Certified Registered Nurse AnesthetistPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- RN
- Sex
- Male
- Sole proprietor
- No
- License
- 210609 (TN)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
5 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
16 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 Procedure for Total Knee Joint Replacement01402 | 16 | $274 |
Typical Medicare-allowed amounts for these services range $274–$274 (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
Additional practice locations (2)
- 1024 S Lemay AveFort Collins, CO 80524-3929Phone: (970) 495-7000
- 2500 Rocky Mountain AveLoveland, CO 80538-9004Phone: (970) 624-2500
Registry dates
- Enumerated
- 2020-11-19
- Last updated
- 2025-03-11
- Certified
- 2025-03-11
Frequently asked questions
- What is Larson Greenfield's NPI number?
- Larson Greenfield's National Provider Identifier (NPI) is 1366045577, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Larson Greenfield's specialty?
- Larson Greenfield is listed in the NPPES registry with a primary specialty of Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Larson Greenfield located?
- Larson Greenfield's practice location on file with NPPES is 3702 Automation Way Ste 103, Fort Collins, CO 80525-5738.
- What is Larson Greenfield's phone number?
- The practice phone number listed in the NPPES registry for Larson Greenfield is (970) 224-2985.
- Does Larson Greenfield accept Medicare?
- Larson Greenfield is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Larson Greenfield's NPI active?
- Yes — Larson Greenfield's NPI (1366045577) is active in the NPPES registry as of the last update on 2025-03-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.