NPPES file of Aug 9, 2026

Donna C. Williams, D.O.

Family Medicine Physician · Orland Park, IL

Donna C. Williams, D.O. is a family medicine physician with a practice address in Orland Park, Illinois, and NPI 1447321849, issued on Nov 10, 2006. Check the license (Illinois 036116955, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1447321849
Name
Donna C. Williams
Credential
D.O.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
036116955 IL
Self-reported in NPPES; status is on the state search
Practice location
9550 W 167TH St, Orland Park, IL 60467
Phone
(708) 870-2620
Enumerated
Nov 10, 2006
Record last updated
Dec 21, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(708) 873-5949
Medicare enrollment
Enrolled (PECOS I20061127000267); accepts Medicare assignment
Medical or professional school
Midwestern University, Chicago College Of Osteopathic Med, 2002
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 9550 W 167TH St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Tiffany Applewhite, WHNP-BCWomen's Health Nurse Practitioner1578092227
  2. Dolphine Coleman, APRNFamily Nurse Practitioner1588717201
  3. Devyn Collins, FNPNurse Practitioner1881114049
  4. Scott Donnelly, DOSurgery Physician1407992738
  5. Sylvia Falls, MDHematology & Oncology Physician1528231750
  6. Jessica Gonzales, FNP-BCFamily Nurse Practitioner1689036659

Verify Donna C. Williams in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
    Search for license 036116955
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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41% more Medicare Part D claims than the average family medicine physician in 2024

4,994 Medicare Part D claims for 448 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 157 claims were for opioids.

  1. Donna Williams4,994
  2. Specialty average3,544

Most prescribed

  1. Atorvastatin Calcium406 claims
  2. Amlodipine Besylate326 claims
  3. Losartan Potassium226 claims
  4. Levothyroxine Sodium199 claims
  5. Metformin Hcl140 claims
  6. Gabapentin127 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.

Industry payments in 2024: $17.55

1 payment: food and beverage; the largest payer was GlaxoSmithKline, LLC. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Donna Williams$17.55
  2. Specialty average$902.55

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Donna C. Williams among 6,215 family medicine physician records in Illinois

Donna C. Williams, D.O. 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 2006, is newer than 9% of them.

  • NPI issued2006 · 9% of these records are older, 59% newer
  • In a Medicare fileYes · 78% of these records are
  • In the CMS Doctors and Clinicians fileYes · 60% of these records are
  • Graduated2002 · median 2006 among the 3,714 with a school on file
  • Record last updated2021 · 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).

58 family medicine physician records list a practice address in Orland Park

They are 58 of the 1,925 NPPES records with a practice address in Orland Park, and 6,215 family medicine physician records in Illinois.

The 8 family medicine physician records with the nearest ZIP codes

  1. Joseph Chan, D.O.Orland Park, IL 604671558396978
  2. Sachin Dixit, MDOrland Park, IL 604671922202456
  3. Richard Geiger, D.O.Orland Park, IL 604671508976747
  4. Donald Gerry, D.O.Orland Park, IL 604671154369395
  5. Jannette Klepek, DOOrland Park, IL 604671881673952
  6. Susan Marcotte, D.O.Orland Park, IL 604671184678377
  7. Mark McKeigue, DOOrland Park, IL 604671962480657
  8. Lisa Montelpasse, M.D.Orland Park, IL 604671487769436

Common questions

What is Donna C. Williams, D.O.'s NPI number?

Donna C. Williams, D.O.'s National Provider Identifier (NPI) is 1447321849, issued on Nov 10, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Donna C. Williams, D.O. located?

The NPPES record lists a practice address at 9550 W 167TH St, Orland Park, IL, 60467. Phone: (708) 870-2620. Providers update this record themselves, so call before visiting.

How can I verify Donna C. Williams, D.O.'s license?

NPPES lists Illinois license number 036116955, 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 Donna C. Williams, D.O. prescribe under Medicare Part D?

In 2024, Donna C. Williams, D.O. had 4,994 Medicare Part D claims for 448 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.

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.