Douglas Adam Mills, D.O.
Internal Medicine Physician · Park Ridge, IL
Douglas Adam Mills, D.O. is an internal medicine physician with a practice address in Park Ridge, Illinois, and NPI 1043519481, issued on Mar 24, 2011. Check the license (Illinois 125.059684, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Douglas Adam Mills
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 125.059684 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1775 W Dempster St, Park Ridge, IL 60068
- Phone
- (847) 723-5871
- Enumerated
- Mar 24, 2011
- Record last updated
- Jul 4, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20170707000299); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 2011
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 1775 W Dempster St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Douglas Adam Mills 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 125.059684Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,040 Medicare Part D claims for 382 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Pantoprazole Sodium280 claims
- Sod Sulf-Potass Sulf-Mag Sulf173 claims
- Ondansetron Odt71 claims
- Omeprazole57 claims
- Linzess49 claims
- Mesalamine36 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): 79.9 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).
Industry payments in 2024: $1,177.46
56 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Texas Digestive Disease Consultants, PLLCSouthlake, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Douglas Adam Mills among 7,238 internal medicine physician records in Illinois
Douglas Adam Mills, D.O. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% 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 53% of them.
- NPI issued2011 · 53% of these records are older, 45% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2011 · median 2003 among the 3,580 with a school on file
- Record last updated2011 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
163 internal medicine physician records list a practice address in Park Ridge
They are 163 of the 2,577 NPPES records with a practice address in Park Ridge, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Park Ridge → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Voula Asimacopoulos, MDPark Ridge, IL 600681114920824
- Howard Becker, MDPark Ridge, IL 600681245269794
- Mark Conley, D.O.Park Ridge, IL 600681366471856
- Maribeth December, M.D.Park Ridge, IL 600681245275635
- Michael Greising, MDPark Ridge, IL 600681629071329
- Thomas Holmes, M.D.Park Ridge, IL 600681689603110
- Jaroslaw Leszczak, MDPark Ridge, IL 600681588606222
- Andrey Lev-Weissberg, MDPark Ridge, IL 600681245206655
Common questions
What is Douglas Adam Mills, D.O.'s NPI number?
Douglas Adam Mills, D.O.'s National Provider Identifier (NPI) is 1043519481, issued on Mar 24, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Douglas Adam Mills, D.O. located?
The NPPES record lists a practice address at 1775 W Dempster St, Park Ridge, IL, 60068. Phone: (847) 723-5871. Providers update this record themselves, so call before visiting.
How can I verify Douglas Adam Mills, D.O.'s license?
NPPES lists Illinois license number 125.059684, 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 Douglas Adam Mills, D.O. prescribe under Medicare Part D?
In 2024, Douglas Adam Mills, D.O. had 1,040 Medicare Part D claims for 382 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Douglas Adam Mills, D.O.'s MIPS final score?
The 2023 MIPS final score is 79.9 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.