Michael Robert Williams, MD
Internal Medicine Physician · Lafayette, CO
Michael Robert Williams, MD is an internal medicine physician with a practice address in Lafayette, Colorado, and NPI 1982676706, issued on Feb 6, 2006. Check the license (Colorado 38544, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Michael Robert Williams
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 38544 CO
Self-reported in NPPES; status is on the state search - Practice location
- 200 Exempla Cir, Lafayette, CO 80026
- Phone
- (303) 338-4545
- Enumerated
- Feb 6, 2006
- Record last updated
- Jun 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 37621335 CO
- Medicare enrollment
- Enrolled (PECOS I20101201001304); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1998
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 200 Exempla Cir
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Connie AkersAmbulatory Care Registered Nurse1619159589
- Jenna Allais, PHARMDPharmacist1487063889
- Jordan Ancmon, DOEmergency Medicine Physician1184284515
- Maria Arenas, CSFASurgical Physician Assistant1306652490
- Kristie ArendPharmacotherapy Pharmacist1528807864
- Ann Aycrigg, NPNurse Practitioner1033235643
Verify Michael Robert Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 38544Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
137 Medicare Part D claims for 74 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 11 claims were for opioids.
Most prescribed
- Cefuroxime17 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.
Bills Medicare through one group practice
- Colorado Permanente Medical Group PCLafayette, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Robert Williams among 2,046 internal medicine physician records in Colorado
Michael Robert Williams, MD is one of 2,046 internal medicine physician records with a practice address in Colorado. 71% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 60% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1998 · median 2006 among the 1,090 with a school on file
- Record last updated2021 · 61% 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 Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
45 internal medicine physician records list a practice address in Lafayette
They are 45 of the 1,905 NPPES records with a practice address in Lafayette, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Lafayette → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Vincent Bilello, M.D.Lafayette, CO 800261821070756
- Susan Blakley, M.D.Lafayette, CO 800261316932387
- Abby Bleistein, M.D.Lafayette, CO 800261235119553
- Cezary Dobija, M.D.Lafayette, CO 800261639151459
- Lisabeth Hall, MDLafayette, CO 800261376578187
- Mahasti Kalantar, MDLafayette, CO 800261598865313
- Ian Lang, DOLafayette, CO 800261184786998
- Lorena Letkomiller, M.D.Lafayette, CO 800261205892239
Common questions
What is Michael Robert Williams, MD's NPI number?
Michael Robert Williams, MD's National Provider Identifier (NPI) is 1982676706, issued on Feb 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Robert Williams, MD located?
The NPPES record lists a practice address at 200 Exempla Cir, Lafayette, CO, 80026. Phone: (303) 338-4545. Providers update this record themselves, so call before visiting.
How can I verify Michael Robert Williams, MD's license?
NPPES lists Colorado license number 38544, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael Robert Williams, MD prescribe under Medicare Part D?
In 2024, Michael Robert Williams, MD had 137 Medicare Part D claims for 74 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.