Mitchell S. King, MD
Family Medicine Physician · Rockford, IL
Mitchell S. King, MD is a family medicine physician with a practice address in Rockford, Illinois, and NPI 1225038276, issued on Jul 29, 2005. Check the license (Illinois 036092084, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Mitchell S. King
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 036092084 IL
40031-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1221 E State St, Rockford, IL 61104
- Phone
- (815) 972-1000
- Enumerated
- Jul 29, 2005
- Record last updated
- Nov 2, 2023
- Fax
- (815) 972-1033
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,215 in Illinois → Look up another NPI →
Also registered at 1221 E State St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mitchell S. King in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036092084Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average family medicine physician in 2024
1,471 Medicare Part D claims for 128 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 141 claims were for opioids.
Most prescribed
- Levothyroxine Sodium85 claims
- Atorvastatin Calcium81 claims
- Hydrocodone-Acetaminophen70 claims
- Hydrochlorothiazide55 claims
- Amlodipine Besylate49 claims
- Metformin Hcl48 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): 87.1 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).
Mitchell S. King among 6,215 family medicine physician records in Illinois
Mitchell S. King, MD is one of 6,215 family medicine physician records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2023 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
145 family medicine physician records list a practice address in Rockford
They are 145 of the 3,893 NPPES records with a practice address in Rockford, and 6,215 family medicine physician records in Illinois.
All 6,215 in Illinois → Every provider in Rockford → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Carlos Aguero-Medina, MDRockford, IL 611041053364349
- Gerald Boyd, M.D.Rockford, IL 611041235111774
- Tammy Homman, M.D.Rockford, IL 611041558337956
- Mary Jo Ironside, MDRockford, IL 611041275579658
- Martin Lipsky, MDRockford, IL 611041801870845
- Lucio Martinez, MDRockford, IL 611041154397354
- Anna Meenan, M.D.Rockford, IL 611041518958578
- Michael Polizzotto, M.D.Rockford, IL 611041871595371
Common questions
What is Mitchell S. King, MD's NPI number?
Mitchell S. King, MD's National Provider Identifier (NPI) is 1225038276, issued on Jul 29, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mitchell S. King, MD located?
The NPPES record lists a practice address at 1221 E State St, Rockford, IL, 61104. Phone: (815) 972-1000. Providers update this record themselves, so call before visiting.
How can I verify Mitchell S. King, MD's license?
NPPES lists Illinois license number 036092084, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mitchell S. King, MD prescribe under Medicare Part D?
In 2024, Mitchell S. King, MD had 1,471 Medicare Part D claims for 128 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Mitchell S. King, MD's MIPS final score?
The 2023 MIPS final score is 87.1 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.