Jennifer B. Gruen, M.D.
Pediatric Adolescent Medicine Physician · Westport, CT
Jennifer B. Gruen, M.D. is a pediatric adolescent medicine physician with a practice address in Westport, Connecticut, and NPI 1629036058, issued on May 3, 2006. Check the license (Connecticut 035301, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Jennifer B. Gruen
- Credential
- M.D.
- Primary taxonomy
- Pediatric Adolescent Medicine Physician 2080A0000X
- License number
- 035301 CT
Self-reported in NPPES; status is on the state search - Practice location
- 156 Kings Highway North, Westport, CT 06880
- Phone
- (203) 221-7337
- Enumerated
- May 3, 2006
- Record last updated
- Jan 3, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (203) 291-0830
- Entity
- Type 1 · individual
8 nearest pediatric adolescent medicine physician records → All 79 in Connecticut → Look up another NPI →
Also registered at 156 Kings Highway North
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Carol Gorman, MDPediatric Adolescent Medicine Physician1316037450
Verify Jennifer B. Gruen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 035301Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $68.81
4 payments; by number, the most common kind was food and beverage; the largest payer was Cranial Technologies, Inc. The 859 providers of this specialty with any payment received $389.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Jennifer B. Gruen among 79 pediatric adolescent medicine physician records in Connecticut
Jennifer B. Gruen, M.D. is one of 79 pediatric adolescent medicine physician records with a practice address in Connecticut. 46% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 22% newer
- In a Medicare fileYes · 46% of these records are
- In the CMS Doctors and Clinicians fileNo · 3% of these records are
- Record last updated2012 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080A0000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Adolescent Medicine Physician providers in Connecticut
There are 79 pediatric adolescent medicine physician records in Connecticut.
All 79 in Connecticut → Every provider in Westport → Pediatric Adolescent Medicine Physician nationwide →
The 8 pediatric adolescent medicine physician records with the nearest ZIP codes
- Carol Gorman, MDWestport, CT 068801316037450
- Fern Perlman, M.D.Westport, CT 068801881692762
- Lori Storch Smith, MDWestport, CT 068801205834199
- Adam Katz, M.D.Wilton, CT 068971093277881
- Andrews Adade, M.D. , M.P.H.Stamford, CT 069021386704682
- Prajakta Kulkarni, M.D.Stamford, CT 069021831470343
- Haydee Bujman De Lancman, MDStamford, CT 069051881788198
- Marcie Schneider, M.D.Greenwich, CT 068311497843197
Common questions
What is Jennifer B. Gruen, M.D.'s NPI number?
Jennifer B. Gruen, M.D.'s National Provider Identifier (NPI) is 1629036058, issued on May 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer B. Gruen, M.D. located?
The NPPES record lists a practice address at 156 Kings Highway North, Westport, CT, 06880. Phone: (203) 221-7337. Providers update this record themselves, so call before visiting.
How can I verify Jennifer B. Gruen, M.D.'s license?
NPPES lists Connecticut license number 035301, 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. 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.