John L. Clark, M.D.
Anesthesiology Physician · Greenwich, CT
John L. Clark, M.D. is an anesthesiology physician with a practice address in Greenwich, Connecticut, and NPI 1366471005, issued on Jul 3, 2006. Check the license (Connecticut 018090, as entered in NPPES) on the Connecticut Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John L. Clark
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 018090 CT
Self-reported in NPPES; status is on the state search - Practice location
- 5 Perryridge RD, Greenwich, CT 06830
- Phone
- (203) 661-5330
- Enumerated
- Jul 3, 2006
- Record last updated
- Mar 31, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicaid ID
- 001180900 CT
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 797 in Connecticut → Look up another NPI →
Also registered at 5 Perryridge RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tena AbrahamPharmacist1649838905
- Hanief Abrahams, M.D.Anesthesiology Physician1497798235
- Diana Adams, M.D.Maternal & Fetal Medicine Physician1255300653
- Saheeb AhmedStudent in an Organized Health Care Education/Training Program1326626748
- Rachel Alfandre, LCSWClinical Social Worker1497077259
- Vicki Altmeyer, M.D.Anatomic Pathology & Clinical Pathology Physician1700807898
Verify John L. Clark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 018090Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
John L. Clark among 797 anesthesiology physician records in Connecticut
John L. Clark, M.D. is one of 797 anesthesiology physician records with a practice address in Connecticut. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 17% of them.
- NPI issued2006 · 17% of these records are older, 54% newer
- In a Medicare fileNo · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2008 · 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 207L00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anesthesiology Physician providers in Connecticut
There are 797 anesthesiology physician records in Connecticut. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 797 in Connecticut → Every provider in Greenwich → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Hanief Abrahams, M.D.Greenwich, CT 068301497798235
- Francisco Brea, MDGreenwich, CT 068301013956952
- Terry Cochran, M.D.Greenwich, CT 068301184653826
- Gary Kalan, M.D.Greenwich, CT 068301861428831
- Michael Levin, M.DGreenwich, CT 068301992734636
- Alfonso Tagliavia, M.DGreenwich, CT 068301316973399
- Sandra Nash, M.D.Greenwich, CT 068311538502182
- Eva Szaniawski, M.D.Greenwich, CT 068311679918064
Common questions
What is John L. Clark, M.D.'s NPI number?
John L. Clark, M.D.'s National Provider Identifier (NPI) is 1366471005, issued on Jul 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John L. Clark, M.D. located?
The NPPES record lists a practice address at 5 Perryridge RD, Greenwich, CT, 06830. Phone: (203) 661-5330. Providers update this record themselves, so call before visiting.
How can I verify John L. Clark, M.D.'s license?
NPPES lists Connecticut license number 018090, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.