Active NPI
Megan Renee Ratterman, D.O.
- Hematology & Oncology Physician
- Sheridan, WY
National Provider Identifier
1407145683
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Hematology & Oncology Physician
- License
- 11132A
- Practice address
- 1401 W 5TH St
Sheridan, WY 82801 - Phone
- (307) 674-6022
- NPI assigned
- Mar 28, 2011
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Hematology & Oncology Physician | 207RH0003X | 11132A | WY | Primary |
| Internal Medicine Physician | 207R00000X | 125.059595 | IL |
Addresses
Primary practice location
1401 W 5TH St
Sheridan, WY 82801
Mailing address
1401 W 5TH St
Sheridan, WY 82801-2799
Phone (307) 674-6022
Electronic endpoints 1
| Type | Endpoint | Use | Affiliation |
|---|---|---|---|
| Direct Messaging Address | mratterman@sheridan.cernerdirect.com | Direct |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in WY
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20170818000090 | WY | Practitioner - Hematology/Oncology | 4385949825 | Reassigns benefits to 1 organization |
Care Compare profile
Medicare Care Compare- Specialty
- Hematology/Oncology
- Education
- Other, 2011
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
- Memorial Hospital of Sheridan County
Practice addresses (Care Compare)
1401 W 5TH St
Sheridan, WY 82801-2705
Phone (307) 672-1000
Hospital & facility affiliations
- Sheridan Memorial Hospital
- Johnson County Healthcare Center
- Billings Clinic Hospital
- Intermountain Health St Vincent Regional Hospital
Merit-based Incentive Payment System (MIPS)
- Final score
- 83.21 of 100
- Quality
- 80.49
- Promoting interoperability
- 94
- Improvement activities
- 40
- Cost
- 68.55
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Osteopathy
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 125.059595 | IL | MD | Internal Medicine Physician |
| 11132A | WY | MD | Hematology & Oncology Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Memorial Hospital of Sheridan County | Current | Accepting new patients | |
| Memorial Hospital of Sheridan County | Current | Accepting new patients |
Locations
1401 W 5th St
Sheridan, WY 82801
Phone (307) 672-1000
Interoperability endpoints
- mratterman@sheridanhospital.direct.varian.com
- mratterman@sheridan.cernerdirect.com
Organizations & group practices 4
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
-
- Community Based Hospice Care Agency
- Sheridan, WY
- NPI 1144359423
-
- Medicare Defined Swing Bed Hospital Unit
- Sheridan, WY
- NPI 1184753261
-
- Home Health Agency
- Sheridan, WY
- NPI 1851420939
Hospital & facility affiliations 12
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Sheridan, WY
- NPI 1487707188
Hospital
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1301270400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1760918400000",
"number": "1407145683",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1401 W 5TH ST",
"city": "SHERIDAN",
"state": "WY",
"postal_code": "828012799",
"telephone_number": "307-674-6022"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1401 W 5TH ST",
"city": "SHERIDAN",
"state": "WY",
"postal_code": "82801",
"telephone_number": "307-674-6022"
}
],
"practiceLocations": [],
"basic": {
"last_name": "RATTERMAN",
"first_name": "MEGAN",
"middle_name": "RENEE",
"credential": "D.O.",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2011-03-28",
"last_updated": "2025-10-20",
"certification_date": "2025-10-20",
"status": "A"
},
"taxonomies": [
{
"code": "207RH0003X",
"taxonomy_group": "",
"desc": "Internal Medicine, Hematology & Oncology",
"state": "WY",
"license": "11132A",
"primary": true
},
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "IL",
"license": "125.059595",
"primary": false
}
],
"identifiers": [],
"endpoints": [
{
"endpointType": "DIRECT",
"endpointTypeDescription": "Direct Messaging Address",
"endpoint": "mratterman@sheridan.cernerdirect.com",
"affiliation": "N",
"use": "DIRECT",
"useDescription": "Direct",
"contentType": "OTHER",
"contentTypeDescription": "Other",
"contentOtherDescription": "CCDA",
"address_1": "1401 W 5th St",
"city": "Sheridan",
"state": "WY",
"country_code": "US",
"postal_code": "82801",
"country_name": "United States",
"address_type": "DOM"
}
],
"other_names": []
}Other providers in Sheridan, WY
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 20, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.