James Michael Grannell, D.O.
Orthopaedic Surgery Physician · Mauston, WI
James Michael Grannell, D.O. is an orthopaedic surgery physician with a practice address in Mauston, Wisconsin, and NPI 1083662019, issued on May 4, 2006. Check the license (Wisconsin 71317-21, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- James Michael Grannell
- Credential
- D.O.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License numbers
- 71317-21 WI
5101007545 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1040 Division St, Mauston, WI 53948
- Phone
- (608) 847-5000
- Enumerated
- May 4, 2006
- Record last updated
- Jun 5, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190729001297); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Osteopathic Medicine, 1978
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 656 in Wisconsin → Look up another NPI →
Also registered at 1040 Division St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Timothy Bjelland, D.O.Family Medicine Physician1811984305
- Randall Brandt, PACPhysician Assistant1710978754
- Gregory Burgess, PA-CSurgical Physician Assistant1932458932
- Kevin Butterfield, DOInternal Medicine Physician1184611592
- Megan Byrnes, MDFamily Medicine Physician1184294902
- Cristina Custer, NPNurse Practitioner1548241821
Verify James Michael Grannell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 71317-21Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
299 Medicare Part D claims for 138 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. 50 claims were for opioids.
Most prescribed
- Meloxicam194 claims
- Hydrocodone-Acetaminophen27 claims
- Oxycodone-Acetaminophen22 claims
- Alendronate Sodium13 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: $258.99
3 payments; by number, the most common kind was food and beverage; the largest payer was Zimmer Biomet Holdings, Inc. 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
- Mile Bluff Medical Center IncMauston, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Michael Grannell among 656 orthopaedic surgery physician records in Wisconsin
James Michael Grannell, D.O. is one of 656 orthopaedic surgery physician records with a practice address in Wisconsin. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 41% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1978 · median 2006 among the 401 with a school on file
- Record last updated2020 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in Wisconsin
There are 656 orthopaedic surgery physician records in Wisconsin.
All 656 in Wisconsin → Every provider in Mauston → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- John Horan, M.D.Mauston, WI 539481184653081
- Robert Riedle, M.D.Mauston, WI 539481538284963
- Gerry Chrabaszcz, MDReedsburg, WI 539591043211063
- Kevin Weber, MDReedsburg, WI 539591386626562
- Bert Callahan, MDWaupun, WI 539631760573927
- Thomas Grossman, M.D.Waupun, WI 539631699749689
- Eric Nelson, MDWaupun, WI 539631164443875
- Matthew Niesen, M.D.Columbus, WI 539251033349840
Common questions
What is James Michael Grannell, D.O.'s NPI number?
James Michael Grannell, D.O.'s National Provider Identifier (NPI) is 1083662019, issued on May 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Michael Grannell, D.O. located?
The NPPES record lists a practice address at 1040 Division St, Mauston, WI, 53948. Phone: (608) 847-5000. Providers update this record themselves, so call before visiting.
How can I verify James Michael Grannell, D.O.'s license?
NPPES lists Wisconsin license number 71317-21, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James Michael Grannell, D.O. prescribe under Medicare Part D?
In 2024, James Michael Grannell, D.O. had 299 Medicare Part D claims for 138 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.