LARSON GREENFIELD (RN) – Certified Registered Nurse Anesthetist, NPI 1366045577
Certified Registered Nurse Anesthetist
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
803 CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) in CO
Provider Addresses for LARSON GREENFIELD (RN)
3702 AUTOMATION WAY STE 103
FORT COLLINS, CO 805255738
Phone: (970) 224-2985
Type: Location
2500 Rocky Mountain Ave
Loveland, CO 805389004
Phone: (970) 624-2500
Type: Location
1024 S LeMay Ave
Fort Collins, CO 805243929
Phone: (970) 495-7000
Type: Location
2278 STONEFISH DR
WINDSOR, CO 805503410
Phone: (719) 688-8732
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $16.
Total Amount is formed as General ($16) + Research ($0) + Ownership ($0) = $16.
Last reported payment date: 2023-05-04 • Largest payer in this snapshot: Merck Sharp & Dohme LLC ($16).
Total Amount
$16
General + Research + Ownership
Payments
1
Total payment records
General Amount
$16
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-05-04
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Merck Sharp & Dohme LLC | $16 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2021-03-24
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20210324001575 | I | Certified Registered Nurse Anesthetist (Crna) | CO | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 00731 | Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | 22 | 21 | $0 |
| 01214 | Anesthesia for total hip replacement | 12 | 12 | $0 |
| 01922 | Anesthesia for x-ray or radiation therapy | 11 | 11 | $0 |
Insurance plans in this area (ZIP 80525)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| A N E S T H E S I O L O G Y | CO | |
| Certified Registered Nurse Anesthetist (Crna) | ND |
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