Gregg Wendell Schellack, D.O.
Orthopaedic Surgery Physician · Livingston, MT
Gregg Wendell Schellack, D.O. is an orthopaedic surgery physician with a practice address in Livingston, Montana, and NPI 1205887544, issued on May 12, 2006. Check the license (Montana PHYS-35111, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Gregg Wendell Schellack
- Credential
- D.O.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- PHYS-35111 MT
Self-reported in NPPES; status is on the state search - Practice location
- 320 Alpenglow LN, Livingston, MT 59047
- Phone
- (406) 222-3541
- Enumerated
- May 12, 2006
- Record last updated
- Aug 21, 2024
- Fax
- (406) 222-7606
- Medicare enrollment
- Enrolled (PECOS I20211123002222); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 320 Alpenglow LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Catherine Akin, NPFamily Nurse Practitioner1124738166
- Todd Anderson, MDOrthopaedic Surgery Physician1730198342
- Krista Arnet, DOEmergency Medicine Physician1053750612
- Kyle Arnet, DOEmergency Medicine Physician1689915241
- Timothy Benson, PA-CPhysician Assistant1780233957
- Alison BlakeInpatient Obstetric Registered Nurse1770458713
Verify Gregg Wendell Schellack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license PHYS-35111Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
108 Medicare Part D claims for 39 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 53 claims were for opioids.
Most prescribed
- Oxycodone-Acetaminophen32 claims
- Naproxen30 claims
- Hydrocodone-Acetaminophen15 claims
- Promethazine Hcl15 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $60.68
2 payments; by number, the most common kind was food and beverage; the largest payer was Stryker Corporation. The 15,003 providers of this specialty with any payment received $23,022.89 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Plains Hospital CorporationPlains, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
3 orthopaedic surgery physician records list a practice address in Livingston
They are 3 of the 274 NPPES records with a practice address in Livingston, and 105 orthopaedic surgery physician records in Montana.
All 3 in Livingston → All 105 in Montana → Every provider in Livingston →
Other orthopaedic surgery physician records in Montana
- Lowell Anderson, MDBozeman, MT1356447163
- Matthew AndersonPolson, MT1033641550
- Todd Anderson, MDLivingston, MT1730198342
- John Avery, MDGreat Falls, MT1821099706
- Matthew Bailey, M.D.Kalispell, MT1396896577
- Lotfi Ben-Youssef, M.D.Sidney, MT1609919364
- Joseph Bergman, M.D.Kalispell, MT1285898569
- Erik Bergquist, M.D.Helena, MT1740406412
- James Blasingame, MDKalispell, MT1477509198
- Nick Blavatsky, MDButte, MT1902986227
Common questions
What is Gregg Wendell Schellack, D.O.'s NPI number?
Gregg Wendell Schellack, D.O.'s National Provider Identifier (NPI) is 1205887544, issued on May 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregg Wendell Schellack, D.O. located?
The NPPES record lists a practice address at 320 Alpenglow LN, Livingston, MT, 59047. Phone: (406) 222-3541. Providers update this record themselves, so call before visiting.
How can I verify Gregg Wendell Schellack, D.O.'s license?
NPPES lists Montana license number PHYS-35111, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregg Wendell Schellack, D.O. prescribe under Medicare Part D?
In 2024, Gregg Wendell Schellack, D.O. had 108 Medicare Part D claims for 39 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.