Martin H. Williams, MD
Internal Medicine Physician · Danbury, CT
Martin H. Williams, MD is an internal medicine physician with a practice address in Danbury, Connecticut, and NPI 1902863798, issued on Apr 27, 2006. Check the license (Connecticut 023084, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Martin H. Williams
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 023084 CT
Self-reported in NPPES; status is on the state search - Practice location
- 100 Reserve RD Ste A4, Danbury, CT 06810
- Phone
- (203) 794-1979
- Enumerated
- Apr 27, 2006
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (203) 794-1796
- Medicaid ID
- 00120846 CT
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 100 Reserve RD Ste A4
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Martin H. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 023084Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
287 Medicare Part D claims for 126 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium23 claims
- Rosuvastatin Calcium22 claims
- Amlodipine Besylate15 claims
- Losartan Potassium15 claims
- Levothyroxine Sodium12 claims
- Lisinopril12 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.
Martin H. Williams among 2,623 internal medicine physician records in Connecticut
Martin H. Williams, MD is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 52% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- 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 Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
112 internal medicine physician records list a practice address in Danbury
They are 112 of the 2,412 NPPES records with a practice address in Danbury, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Danbury → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Alka Aggarwal, MDDanbury, CT 068101427041987
- Charles Cahn, M.D.Danbury, CT 068101720064504
- Karen Coblens, MDDanbury, CT 068101063479848
- Allen Davis, M.D.Danbury, CT 068101639163439
- Amin Elashker, DODanbury, CT 068101093794182
- Sateesh Kathiravelu, M.D.Danbury, CT 068101083665244
- Asha Marhatta, MD; MPHDanbury, CT 068101366490013
- Kathleen Mauks, M.D.Danbury, CT 068101629064035
Common questions
What is Martin H. Williams, MD's NPI number?
Martin H. Williams, MD's National Provider Identifier (NPI) is 1902863798, issued on Apr 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Martin H. Williams, MD located?
The NPPES record lists a practice address at 100 Reserve RD Ste A4, Danbury, CT, 06810. Phone: (203) 794-1979. Providers update this record themselves, so call before visiting.
How can I verify Martin H. Williams, MD's license?
NPPES lists Connecticut license number 023084, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Martin H. Williams, MD prescribe under Medicare Part D?
In 2024, Martin H. Williams, MD had 287 Medicare Part D claims for 126 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.