William N. Schreiber, MD
Internal Medicine Physician · Woodbridge, CT
William N. Schreiber, MD is an internal medicine physician with a practice address in Woodbridge, Connecticut, and NPI 1366441826, issued on Jul 18, 2005. Check the license (Connecticut 023066, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- William N. Schreiber
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 023066 CT
Self-reported in NPPES; status is on the state search - Practice location
- 1 Bradley RD, Woodbridge, CT 06525
- Phone
- (203) 397-3950
- Enumerated
- Jul 18, 2005
- Record last updated
- Oct 17, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100911000095); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 1976
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 1 Bradley RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ravit Avni-Singer, MSW LCSWClinical Social Worker1861721458
- Kyle Branday, MSPTPhysical Therapist1467585331
- Lorraine ByamMental Health Counselor1821462375
- Traci Cipriano, PH.D.Clinical Psychologist1770890535
- Michael Demetriades, PTPhysical Therapist1811229586
- Michael Dow, MSPTPhysical Therapist1104929298
Verify William N. Schreiber in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 023066Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% more Medicare Part D claims than the average internal medicine physician in 2024
3,694 Medicare Part D claims for 613 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 128 claims were for opioids.
Most prescribed
- Atorvastatin Calcium308 claims
- Levothyroxine Sodium206 claims
- Losartan Potassium176 claims
- Metoprolol Succinate134 claims
- Lorazepam133 claims
- Amlodipine Besylate119 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 MIPS final score for 2023 (Medicare payment program): 93.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Northeast Medical Group IncWoodbridge, CT
- Rehabilitation Associates IncFairfield, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William N. Schreiber among 2,623 internal medicine physician records in Connecticut
William N. Schreiber, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 89% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1976 · median 2004 among the 1,646 with a school on file
- Record last updated2011 · 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).
6 internal medicine physician records list a practice address in Woodbridge
They are 6 of the 242 NPPES records with a practice address in Woodbridge, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Woodbridge → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ramin Ahmadi, M.D.Woodbridge, CT 065251124009451
- Allen Heller, M.D.Woodbridge, CT 065251417381823
- Veronica Marer, MDWoodbridge, CT 065251659389526
- Angeles Ocson-Belleza, MDWoodbridge, CT 065251386907368
- Hyung Paek, MDWoodbridge, CT 065251730249814
- William Fischer, M.D.Bethany, CT 065241821373952
- Judy Hlawitschka, MDNew Haven, CT 065201437190840
- Vanessa Jefferson, MSN, C-ANP, CDENew Haven, CT 065201093926784
Common questions
What is William N. Schreiber, MD's NPI number?
William N. Schreiber, MD's National Provider Identifier (NPI) is 1366441826, issued on Jul 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William N. Schreiber, MD located?
The NPPES record lists a practice address at 1 Bradley RD, Woodbridge, CT, 06525. Phone: (203) 397-3950. Providers update this record themselves, so call before visiting.
How can I verify William N. Schreiber, MD's license?
NPPES lists Connecticut license number 023066, 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 N. Schreiber, MD prescribe under Medicare Part D?
In 2024, William N. Schreiber, MD had 3,694 Medicare Part D claims for 613 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is William N. Schreiber, MD's MIPS final score?
The 2023 MIPS final score is 93.3 of 100. 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.