Ronald Cwik, M.D.
Maternal & Fetal Medicine Physician · Guilford, CT
Ronald Cwik, M.D. is a maternal & fetal medicine physician with a practice address in Guilford, Connecticut, and NPI 1982819058, issued on May 11, 2007. Check the license (Connecticut 016040, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Ronald Cwik
- Credential
- M.D.
- Primary taxonomy
- Maternal & Fetal Medicine Physician 207VM0101X
- License number
- 016040 CT
Self-reported in NPPES; status is on the state search - Practice location
- 652 Boston Post RD, Guilford, CT 06437
- Phone
- (203) 453-5214
- Enumerated
- May 11, 2007
- Entity
- Type 1 · individual
Also registered at 652 Boston Post RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Breton, LCSWClinical Social Worker1649466228
- Gary Dubin, D.D.S.General Practice Dentistry1821200759
- Sarah Gerritz, MDFamily Medicine Physician1699886036
- Linda Gracco, PH.D. CCCSLPSpeech-Language Pathologist1184763054
- Charles Hollander, MDInternal Medicine Physician1902960529
- Riham Kalta, D.M.D.General Practice Dentistry1467472845
Verify Ronald Cwik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 016040Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
38% more Medicare Part D claims than the average maternal & fetal medicine physician in 2024
112 Medicare Part D claims for 50 beneficiaries, against an average of 81 among the 268 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Alendronate Sodium19 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.
Maternal & Fetal Medicine Physician providers in Connecticut
There are 36 maternal & fetal medicine physician records in Connecticut.
Other maternal & fetal medicine physician records in Connecticut
- Lauryn Adams, MD, MPHFarmington, CT1427511674
- Jonathan Barnhard, MDNorwalk, CT1548360944
- Courtney Birchall, MDHartford, CT1841782182
- Whitney Booker, MDStamford, CT1972878148
- Adam Borgida, M.D.Hartford, CT1366465031
- Winston Campbell, MDFarmington, CT1679578355
- Joshua Copel, MDNew Haven, CT1235112392
- William Cusick, MDBridgeport, CT1447341227
- Anna Denoble, MD, MSCNew Haven, CT1053739441
- Mariana Espinal, M.D.New Haven, CT1306373071
Common questions
What is Ronald Cwik, M.D.'s NPI number?
Ronald Cwik, M.D.'s National Provider Identifier (NPI) is 1982819058, issued on May 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ronald Cwik, M.D. located?
The NPPES record lists a practice address at 652 Boston Post RD, Guilford, CT, 06437. Phone: (203) 453-5214. Providers update this record themselves, so call before visiting.
How can I verify Ronald Cwik, M.D.'s license?
NPPES lists Connecticut license number 016040, 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 Ronald Cwik, M.D. prescribe under Medicare Part D?
In 2024, Ronald Cwik, M.D. had 112 Medicare Part D claims for 50 beneficiaries; the average among maternal & fetal medicine physician prescribers was 81. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.