DR. JAMES MICHAEL GRANNELL (D.O.) – Orthopaedic Surgery Physician, NPI 1083662019

DR. JAMES MICHAEL GRANNELL (D.O.) is a healthcare provider. based in Mauston, Wisconsin. specializing in ORTHOPEDIC SURGERY. They hold the professional credentials D.O.. They hold a License No. 5101007545 (MI). The NPI Number for DR. JAMES MICHAEL GRANNELL (D.O.) is 1083662019

Main info

Male
48 Years Of Experience
Accepts Medicare Assignment
Name
DR. JAMES MICHAEL GRANNELL (D.O.)
NPI
1083662019
Phone
(608) 847-5000
Address
1040 DIVISION ST
Enumeration Date
4 May 2006
Last Update Date
5 June 2020

Doctor Profile

Medical School Name
MICHIGAN STATE UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Secondary Phone
6082548888
Graduation Year
1978 (48 years ago)
PAC ID
1759330426
Group Practice PAC ID
8527971399
Professional Enrollment ID
I20050120000066
Address ID
WI539658293WI28XXXSTXX300
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience73
Completeness75
Years active:20State licenses:2Digital endpointsOther names

628 ORTHOPEDIC SURGERY in WI

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Provider Addresses for DR. JAMES MICHAEL GRANNELL (D.O.)

  • 1040, Division Street, Mauston, Juneau County, Wisconsin, 53948, United States

    MAUSTON, WI 539481931

    Phone: (608) 847-5000

    Mailing address matches the actual address.

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

CMS reports 4 Open Payments records for all available years, with a total value of $325.

Total Amount is formed as General ($325) + Research ($0) + Ownership ($0) = $325.

Last reported payment date: 2024-09-24 • Largest payer in this snapshot: Heron Therapeutics, Inc. ($155).

Total Amount

$325

General + Research + Ownership

Payments

4

Total payment records

General Amount

$325

General payments

Research Amount

$0

Research funding

Ownership Amount

$0

Ownership interests

Ownership Count

0

Ownership records

Last Payment Date

2024-09-24

Latest reported date

Top Companies

Largest payers in this snapshot

View all Open Payments →|Open Payments Risk Radar →

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: 2019-07-29

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

  1. Medicare enrolled
  2. On CMS revalidation list
  3. Due date assigned
  4. Revalidate in PECOS

CMS enrollment records

Enrollment IDTypeSpecialtyStateDue date
I20190729001297IOrthopedic SurgeryWITBD

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.

Verify on CMS Revalidation Lookup Tool

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.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 53948)

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Provider's Procedures

DR. JAMES MICHAEL GRANNELL (D.O.) performs procedures in ORTHOPEDIC SURGERY. See the list of HCPCS codes below.
SpecialtyPractice State
HCPCS Code
Description
Service Count
Beneficiary Count
ORTHOPEDIC SURGERYMI27447Repair of knee joint1513

Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.
PAC ID: 8527971399View full group profile
NameSpecialtyState
-WI
Physician AssistantWI
Certified Registered Nurse Anesthetist (Crna)WI
O B S T E T R I C S/ G Y N E C O L O G YWI
Nurse PractitionerWI
General SurgeryWI
-WI
Orthopedic SurgeryWI
Physician AssistantWI
Cardiovascular Disease (Cardiology), Internal MedicineWI

Reviews

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Frequently asked questions

Does DR. JAMES MICHAEL GRANNELL (D.O.) have a public NPI I can cite?
Public records show DR. JAMES MICHAEL GRANNELL (D.O.) under NPI 1083662019.
Is DR. JAMES MICHAEL GRANNELL (D.O.) currently accepting referrals based on NPI status?
Registry metadata lists DR. JAMES MICHAEL GRANNELL (D.O.) as active.
How should patients interpret DR. JAMES MICHAEL GRANNELL (D.O.)'s specialty?
The extract shows Orthopaedic Surgery Physician for DR. JAMES MICHAEL GRANNELL (D.O.). Clinical services aligned with this taxonomy classification.
Can patients visit DR. JAMES MICHAEL GRANNELL (D.O.) in Mauston, Wisconsin?
For routing, start with Mauston, Wisconsin for DR. JAMES MICHAEL GRANNELL (D.O.), then verify phone and hours locally.
Can I export DR. JAMES MICHAEL GRANNELL (D.O.)'s record?
You can download the official NPPES record; we summarize key fields for readability.

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