William Sacks, MD
Internal Medicine Physician · Milford, CT
William Sacks, MD is an internal medicine physician with a practice address in Milford, Connecticut, and NPI 1871537548, issued on Jun 15, 2006. Check the license (Connecticut 027774, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- William Sacks
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 027774 CT
162917-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 300 Seaside Avenue, Milford, CT 06460
- Phone
- (203) 876-4000
- Enumerated
- Jun 15, 2006
- Record last updated
- Sep 19, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080228000258); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 1983
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 300 Seaside Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Given, MDSpecialist1699722652
- Nalin Perera, M.D.Emergency Medicine Physician1730272428
Verify William Sacks in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 027774Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
247 Medicare Part D claims for 179 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 49 claims were for opioids.
Most prescribed
- Cefadroxil31 claims
- Oxycodone-Acetaminophen25 claims
- Prednisone25 claims
- Tramadol Hcl15 claims
- Ibuprofen13 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): 84.5 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).
Bills Medicare through one group practice
- Hartford Healthcare Medical Group Specialists PLLCStorrs, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Sacks among 2,623 internal medicine physician records in Connecticut
William Sacks, 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 fileYes · 63% of these records are
- Graduated1983 · median 2004 among the 1,646 with a school on file
- Record last updated2015 · 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).
33 internal medicine physician records list a practice address in Milford
They are 33 of the 1,073 NPPES records with a practice address in Milford, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Milford → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Brian Beaulieu, M. D.Milford, CT 064601588608384
- Robin Brammer, DOMilford, CT 064601275575995
- Deborah Caserta-Brunson, MDMilford, CT 064601659392363
- Dean Har, MDMilford, CT 064601104857150
- Shobha Jagadeesh, MDMilford, CT 064601174538508
- John Katsetos, MDMilford, CT 064601831121979
- Aleflor Ragaza, MDMilford, CT 064601841275666
- Michael Rudolph, M.D.Milford, CT 064601700999000
Common questions
What is William Sacks, MD's NPI number?
William Sacks, MD's National Provider Identifier (NPI) is 1871537548, issued on Jun 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Sacks, MD located?
The NPPES record lists a practice address at 300 Seaside Avenue, Milford, CT, 06460. Phone: (203) 876-4000. Providers update this record themselves, so call before visiting.
How can I verify William Sacks, MD's license?
NPPES lists Connecticut license number 027774, 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 William Sacks, MD prescribe under Medicare Part D?
In 2024, William Sacks, MD had 247 Medicare Part D claims for 179 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is William Sacks, MD's MIPS final score?
The 2023 MIPS final score is 84.5 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.