William Santiago, MD
Internal Medicine Physician · Meriden, CT
William Santiago, MD is an internal medicine physician with a practice address in Meriden, Connecticut, and NPI 1568027373, issued on May 7, 2019. Check the license (Connecticut 069800, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- William Santiago
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 069800 CT
Self-reported in NPPES; status is on the state search - Practice location
- 435 Lewis Ave, Meriden, CT 06451
- Phone
- (203) 694-8200
- Enumerated
- May 7, 2019
- Record last updated
- Jun 3, 2022
- Medicare enrollment
- Enrolled (PECOS I20220513002039); accepts Medicare assignment
- Medical or professional school
- University Of Connecticut School Of Medicine, 2019
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 435 Lewis Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marwan Al Aoudi, MBB.CHSurgery Physician1104322700
- Ashley Allatin, PA-CSurgical Physician Assistant1407043557
- Melissa Alvarez, RN, BSN, IBCLCRegistered Nurse1285111443
- Jason Andrus, PA-CSurgical Physician Assistant1104808369
- Tracy Barber, D.O.Emergency Medicine Physician1275615957
- Ebisa Bekele, MDInternal Medicine Physician1649698887
Verify William Santiago in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 069800Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average internal medicine physician in 2024
370 Medicare Part D claims for 196 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 17 claims were for opioids.
Most prescribed
- Prednisone33 claims
- Eliquis23 claims
- Cefpodoxime Proxetil22 claims
- Amlodipine Besylate13 claims
- Clopidogrel13 claims
- Doxycycline Hyclate13 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): 92.6 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).
2 hospitals and group practices
- Midstate Medical CenterMeriden, CT · Acute Care Hospitals4 of 5 stars
- The Hospital OF Central Connecticut AT New Britain General And BradleyNew Britain, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
William Santiago among 2,623 internal medicine physician records in Connecticut
William Santiago, 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 2019, is newer than 85% of them.
- NPI issued2019 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2019 · median 2004 among the 1,646 with a school on file
- Record last updated2022 · 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).
21 internal medicine physician records list a practice address in Meriden
They are 21 of the 897 NPPES records with a practice address in Meriden, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Meriden → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ebisa Bekele, MDMeriden, CT 064511649698887
- Kimberly Brown, M.D.Meriden, CT 064511164717955
- Daniel De Gala, M.D.Meriden, CT 064511558892612
- Chase Foster-SpenceMeriden, CT 064511508506940
- Krzysztof Jakubowski, MDMeriden, CT 064511013978691
- Salma KamalMeriden, CT 064511245613975
- Sholeh Kamalian, MDMeriden, CT 064511114952116
- John Lee, M.D.Meriden, CT 064511326574310
Common questions
What is William Santiago, MD's NPI number?
William Santiago, MD's National Provider Identifier (NPI) is 1568027373, issued on May 7, 2019. An NPI identifies a provider in billing; it is not a license.
Where is William Santiago, MD located?
The NPPES record lists a practice address at 435 Lewis Ave, Meriden, CT, 06451. Phone: (203) 694-8200. Providers update this record themselves, so call before visiting.
How can I verify William Santiago, MD's license?
NPPES lists Connecticut license number 069800, 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 Santiago, MD prescribe under Medicare Part D?
In 2024, William Santiago, MD had 370 Medicare Part D claims for 196 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is William Santiago, MD's MIPS final score?
The 2023 MIPS final score is 92.6 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.