Christopher John Differding, PA-C
Physician Assistant · Spring Valley, IL
Christopher John Differding, PA-C is a physician assistant with a practice address in Spring Valley, Illinois, and NPI 1295002715, issued on Nov 29, 2011. Check the license (Illinois 085.004245, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Christopher John Differding
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 085.004245 IL
Self-reported in NPPES; status is on the state search - Practice location
- 600 E 1St St, Spring Valley, IL 61362
- Phone
- (815) 664-2617
- Enumerated
- Nov 29, 2011
- Record last updated
- Aug 3, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (815) 664-5204
- Medicare enrollment
- Enrolled (PECOS I20120117000236); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,926 in Illinois → Look up another NPI →
Also registered at 600 E 1St St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Arkins, R.PH.Pharmacist1881724839
- Elizabeth Baker, MS, RD, LDNRegistered Dietitian1427307974
- Jessica Brown, RDRegistered Dietitian1245838176
- Marilyn Csernus, LD,CDE,MS,RDNutrition Education Nutritionist1093984932
- Geri Dew, R.D., LDNRegistered Dietitian1659609048
- Tamara Dunlap-Workman, PA-CPhysician Assistant1396811907
Verify Christopher John Differding in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 085.004245Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.0 times the Medicare Part D claims of the average physician assistant in 2024
3,302 Medicare Part D claims for 932 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 12 claims were for opioids.
Most prescribed
- Tamsulosin Hcl810 claims
- Solifenacin Succinate264 claims
- Alfuzosin Hcl Er263 claims
- Myrbetriq237 claims
- Finasteride193 claims
- Nitrofurantoin159 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 93.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 3 group practices
- Illinois Urologic Health Surgeons SCOttawa, IL
- Pai Participant 27, PCOttawa, IL
- T4 Medical PLLCOttawa, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Christopher John Differding among 4,926 physician assistant records in Illinois
Christopher John Differding, PA-C is one of 4,926 physician assistant records with a practice address in Illinois. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 24% of them.
- NPI issued2011 · 24% of these records are older, 73% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2011 · median 2019 among the 3,407 with a school on file
- Record last updated2020 · 35% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 physician assistant records list a practice address in Spring Valley
They are 2 of the 73 NPPES records with a practice address in Spring Valley, and 4,926 physician assistant records in Illinois.
All 4,926 in Illinois → Every provider in Spring Valley → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Tamara Dunlap-Workman, PA-CSpring Valley, IL 613621396811907
- Matthew Bruno, P.A.Peru, IL 613541104854066
- John Kuzma, PA-CPeru, IL 613541518361641
- Debra PyszkaPeru, IL 613541720161524
- Kristie Shin, PA-CPeru, IL 613541861644734
- Angela Vezzetti, PA-CPeru, IL 613541699005678
- Shenyka Wheatly, PA-CPeru, IL 613541659706919
- Martina Kotrba, PAUtica, IL 613731770452583
Common questions
What is Christopher John Differding, PA-C's NPI number?
Christopher John Differding, PA-C's National Provider Identifier (NPI) is 1295002715, issued on Nov 29, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Christopher John Differding, PA-C located?
The NPPES record lists a practice address at 600 E 1St St, Spring Valley, IL, 61362. Phone: (815) 664-2617. Providers update this record themselves, so call before visiting.
How can I verify Christopher John Differding, PA-C's license?
NPPES lists Illinois license number 085.004245, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Christopher John Differding, PA-C prescribe under Medicare Part D?
In 2024, Christopher John Differding, PA-C had 3,302 Medicare Part D claims for 932 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Christopher John Differding, PA-C's MIPS final score?
The 2023 MIPS final score is 93.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.