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Dr. William James Warrender, MD
NPI1770902538PAC ID1355574310
- Medicare services, 2024
- 1,248
- Medicare patients, 2024
- 269
- Part D claims, 2024
- 178
- Publications
- 21
- MIPS score, 2024
- 82
- Practice address
- 53990 Carmichael Dr Ste 100, South Bend, IN 46635
- Practice phone
- Call (574) 243-9700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Allied Physicians Surgery Center
Surgery Center - Medicare-Certified · South Bend, Indiana
Find Dr. Warrender's professional email, personal email and mobile number
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Dr. William James Warrender is an orthopedic surgeon in South Bend, Indiana
Dr. Warrender practices at Allied Physicians Surgery Center in South Bend, Indiana.
Dr. Warrender's NPI, 1770902538, was assigned on April 9, 2014. Dr. Warrender graduated from Jefferson Medical College of Thomas Jefferson University in 2014. Dr. Warrender holds Indiana license 01082069A.
NPI and contact details
- NPI
- 1770902538NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1355574310
- NPI enumeration date
- April 9, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (574) 243-9700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William James Warrender practices at Allied Physicians Surgery Center in South Bend, Indiana
Dr. Warrender's primary practice is Allied Physicians Surgery Center, at 53990 Carmichael Dr Ste 100, South Bend, IN 46635. The practice phone is (574) 243-9700.
- Allied Physicians Surgery Center53990 Carmichael Dr Ste 100, South Bend, IN 46635Phone(574) 243-9700
Source: Dmand AI Affiliation Data
Dr. William James Warrender is affiliated with 6 sites of care and 2 medical groups
Dr. Warrender's primary practice is Allied Physicians Surgery Center in South Bend, Indiana. Dr. Warrender is also affiliated with Corewell Health Lakeland Hospitals - Saint Joseph Hospital. The medical group on file is Central Indiana Orthopedics. Dmand AI also links Dr. Warrender to 2 more hospitals, 2 group practices and clinics and 1 medical group, each named with a free account.
Allied Physicians Surgery CenterPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William James Warrender's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Warrender practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Allied Physicians Surgery Center | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William James Warrender is one of 429 orthopedic surgeons in Indiana
Orthopaedic surgery is Dr. Warrender's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Warrender is licensed in Indiana.
Specialties and state licenses
- Orthopaedic surgery, IndianaPrimary
Orthopedic surgeons near Dr. Warrender
Counts of orthopedic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William James Warrender billed Medicare for 1,248 services in 2024
CMS data shows 1,248 Medicare services from Dr. Warrender across 18 procedure codes in 2024, for 269 Medicare patients. Medicare paid $58,803 for them.
Medicare services, 20241,248
Medicare patients269
Paid by Medicare$58,803
Procedure codes18
Dr. Warrender's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 2852024: 50276%
- Office and hospital visits
- 2023: 4112024: 3759%
- Imaging
- 2023: 2102024: 18213%
- Surgery
- 2023: 1762024: 1751%
- Other services
- 2023: 282024: 1450%
Where Dr. Warrender's Medicare services took place, 2024
- In an office1,17994%
- In a facility696%
Dr. Warrender compared with the Indiana median for orthopedic surgeons, 2024
- Dr. Warrender
- Indiana median
- Medicare services
- 1,248vs 1,3427% below
- Medicare patients
- 269vs 262Close to median
- Part D claims
- 136vs 16618% below
Medians across 423 orthopedic surgeons in Indiana with Dmand AI profiles that report each measure.
Dr. Warrender's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William James Warrender treated 269 Medicare patients in 2024, average age 72
CMS counts 269 Medicare patients who saw Dr. Warrender in 2024. The largest group is 65 to 74, with 158 patients. 71% of them have high cholesterol, and 68% have high blood pressure. 12% are also on Medicaid. Their average risk score is 1.07, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Warrender's median patient age at 61, with 52% women.
Medicare patients, 2024269
Average age72
Average risk score1.07
Also on Medicaid12%
Dr. Warrender's Medicare patients by age, 2024
Dr. Warrender's Medicare patients by sex, 2024
- Women16260%
- Men10740%
Chronic conditions among Dr. Warrender's Medicare patients, 2024
- High cholesterol71%
- High blood pressure68%
- Arthritis67%
- Mood disorders26%
- Diabetes25%
- Depression24%
- Ischemic heart disease22%
- Chronic kidney disease20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Warrender's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women52%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William James Warrender wrote 178 Medicare Part D claims in 2024
In 2024, Dr. Warrender wrote 178 Medicare Part D claims for 122 patients. 100% of them were for generic drugs. CMS names the drug for 136 of them, across 4 drugs with 11 or more claims each, at $513 in total drug cost. In 2023, CMS named 178 claims across 6 drugs.
Part D claims, 2024178
Drugs named by CMS4
Total drug cost$513
Part D patients122
Dr. Warrender's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Warrender's Part D claims, 2024
- Opioids23%41 of 178 claims
- Antibiotics7%13 of 178 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1782024: 13624%
Drugs named by CMS: 4 in 2024, 6 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. William James Warrender scored 82 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 82 out of 100 for Dr. Warrender for performance year 2024, reported as part of a group. Dr. Warrender accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Warrender's MIPS scores, performance year 2024
- 82of 100Final score
- 64.5of 100Quality
- 96of 100Promoting Interoperability
- 40of 100Improvement Activities
- 78of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. William James Warrender has 21 publications on record
Dmand AI links 21 papers to Dr. Warrender, published from 2011 to 2022. 2011 was the busiest year, with 4. The most frequent topics are Anesthetics, Local, Arthroscopy and Patient Satisfaction. Dr. Warrender has published most often in Am J Sports Med. Dr. Warrender's most frequent co-authors are Joseph Albert Abboud, MD, Asif M. Ilyas, MD and Christopher J. Lucasti, DO.
Papers21
Years published2011 to 2022
Dr. Warrender's papers by year, 2011 to 2022
Topics Dr. Warrender writes about most
- Anesthetics, Local
- Arthroscopy
- Patient Satisfaction
- Ambulatory Surgical Procedures
- Carpal Tunnel Syndrome
- Elbow Joint
- Fracture Fixation, Internal
- Fractures, Open
Dr. Warrender's most frequent co-authors
- Joseph Albert Abboud, MD6 shared papers
- Asif M. Ilyas, MD4 shared papers
- Christopher J. Lucasti, DO4 shared papers
Recent publications by Dr. Warrender
ArthroscopyMagnetic Resonance ImagingRotator Cuff
J Am Acad Orthop Surg Glob Res Rev
Hand (N Y)
Fractures, OpenObserver Variation
Bone ScrewsFracture Fixation, InternalFractures, Bone
See who Dr. Warrender researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Warrender works with, so you can find a warm path to the right orthopedic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. William James Warrender received $9,580 in industry payments from 2017 to 2025
CMS Open Payments shows 55 general payments to Dr. Warrender from 24 drug and device companies from 2017 to 2025. Education make up the largest share, 57% of the total. Liberty Surgical Inc. paid the most, $3,453.
General payments to Dr. Warrender by program year, 2017 to 2025
General payments to Dr. Warrender by kind, 2017 to 2025
$9.6Kin total
- Education$5,46957%
- Food and beverage$2,88630%
- Travel and lodging$1,22413%
Companies that paid Dr. Warrender the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William James Warrender graduated from Jefferson Medical College of Thomas Jefferson University
Dr. Warrender graduated from Jefferson Medical College of Thomas Jefferson University in 2014.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William James Warrender's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William James Warrender
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William James Warrender's NPI number?
Dr. William James Warrender's NPI number is 1770902538. It was assigned on April 9, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. William James Warrender?
Dr. William James Warrender is an orthopedic surgeon in South Bend, Indiana. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. William James Warrender practice?
Dr. Warrender practices at 53990 Carmichael Dr Ste 100, South Bend, IN 46635. Dr. Warrender's primary practice is Allied Physicians Surgery Center in South Bend, Indiana. Dmand AI also links Dr. Warrender to 2 hospitals, 2 group practices and clinics and 1 medical group.
What is Dr. William James Warrender's office phone number?
The practice phone on file for Dr. Warrender is (574) 243-9700.
What is Dr. William James Warrender's medical license number?
Dr. Warrender holds Indiana license 01082069A.
Which hospitals is Dr. William James Warrender affiliated with?
Dr. Warrender is affiliated with Corewell Health Lakeland Hospitals - Saint Joseph Hospital. Dmand AI links Dr. Warrender to 2 more hospitals.
What medical group is Dr. William James Warrender part of?
Dr. Warrender is linked to Central Indiana Orthopedics. Dmand AI links Dr. Warrender to 1 more medical group.
Does Dr. William James Warrender accept Medicare?
Yes. CMS data shows Dr. Warrender billed Medicare for 1,248 services in 2024, and Dr. Warrender accepts Medicare assignment.
What is Dr. William James Warrender's MIPS score?
Dr. Warrender's MIPS final score for performance year 2024 is 82 out of 100, reported as part of a group.
How many Medicare patients does Dr. William James Warrender see?
CMS counts 269 Medicare patients who saw Dr. Warrender in 2024, with an average age of 72.
Show 7 more questionsShow fewer questions
What services does Dr. William James Warrender bill to Medicare?
In 2024, Dr. Warrender's most billed Medicare services were injected or infused drug (J1100), office visit, established patient (99214) and office visit, established patient (99213).
Where did Dr. William James Warrender go to medical school?
Dr. Warrender graduated from Jefferson Medical College of Thomas Jefferson University in 2014.
What drugs does Dr. William James Warrender prescribe most?
In 2024 Medicare Part D data, Dr. Warrender's most prescribed drugs by claims were Methylprednisolone, Meloxicam and Hydrocodone-Acetaminophen.
Has Dr. William James Warrender received payments from drug or device companies?
CMS Open Payments shows $9,580 in general payments to Dr. Warrender from 24 companies from 2017 to 2025. The largest total came from Liberty Surgical Inc.
How long has Dr. William James Warrender been practicing?
Dr. Warrender graduated from medical school in 2014, 12 years ago.
Does Dr. William James Warrender do research?
Dmand AI links 21 publications to Dr. Warrender, published from 2011 to 2022.
Who does Dr. William James Warrender publish with?
Dr. Warrender's most frequent co-authors are Joseph Albert Abboud, MD (6 shared papers), Asif M. Ilyas, MD (4 shared papers) and Christopher J. Lucasti, DO (4 shared papers).
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