Ronald Arthur Cwik, M.D.
Maternal & Fetal Medicine Physician · Guilford, CT
Ronald Arthur 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 Arthur 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
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (203) 458-6825
- Entity
- Type 1 · individual
8 nearest maternal & fetal medicine physician records → All 67 in Connecticut → Look up another NPI →
Also registered at 652 Boston Post RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ronald Arthur 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
2.7 times the Medicare Part D claims of the average maternal & fetal medicine physician in 2024
112 Medicare Part D claims for 50 beneficiaries, against an average of 41 among the 353 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.
Ronald Arthur Cwik among 67 maternal & fetal medicine physician records in Connecticut
Ronald Arthur Cwik, M.D. is one of 67 maternal & fetal medicine physician records with a practice address in Connecticut. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 43% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 73% of these records are
- Record last updated2007 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VM0101X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Maternal & Fetal Medicine Physician providers in Connecticut
There are 67 maternal & fetal medicine physician records in Connecticut.
All 67 in Connecticut → Every provider in Guilford → Maternal & Fetal Medicine Physician nationwide →
The 8 maternal & fetal medicine physician records with the nearest ZIP codes
- Mert Bahtiyar, MDNew Haven, CT 065101356324438
- Joshua Copel, MDNew Haven, CT 065101235112392
- Mariana Espinal, M.D.New Haven, CT 065101306373071
- Olga Grechukhina, M.D.New Haven, CT 065101548608961
- John Hardy, M.D.New Haven, CT 065101679632582
- Hillary Hosier, MDNew Haven, CT 065101407384522
- Roxanna Irani, M.D., PH.D.New Haven, CT 065101295021855
- Safinaz Ozcan, MDNew Haven, CT 065101780614834
Common questions
What is Ronald Arthur Cwik, M.D.'s NPI number?
Ronald Arthur 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 Arthur 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 Arthur 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 Arthur Cwik, M.D. prescribe under Medicare Part D?
In 2024, Ronald Arthur Cwik, M.D. had 112 Medicare Part D claims for 50 beneficiaries; the average among maternal & fetal medicine physician prescribers was 41. 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.