Garth Oliver, M.D.
Internal Medicine Physician · West Haven, CT
Garth Oliver, M.D. is an internal medicine physician with a practice address in West Haven, Connecticut, and NPI 1285673145, issued on Jun 6, 2006. Check the license (Connecticut 035510, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Garth Oliver
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 035510 CT
Self-reported in NPPES; status is on the state search - Practice location
- 603 Savin Ave, West Haven, CT 06516
- Phone
- (203) 932-2400
- Enumerated
- Jun 6, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (203) 932-2401
- Medicare enrollment
- Enrolled (PECOS I20031118000048); accepts Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 1993
- 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 603 Savin Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Martine Saintilus, LCSWClinical Social Worker1912781345
Verify Garth Oliver in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 035510Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,399 Medicare Part D claims for 168 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 60 claims were for opioids.
Most prescribed
- Atorvastatin Calcium119 claims
- Amlodipine Besylate87 claims
- Levothyroxine Sodium87 claims
- Rosuvastatin Calcium46 claims
- Meloxicam40 claims
- Albuterol Sulfate Hfa39 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.
Garth Oliver among 2,623 internal medicine physician records in Connecticut
Garth Oliver, M.D. 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 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 52% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1993 · median 2004 among the 1,646 with a school on file
- Record last updated2026 · 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).
84 internal medicine physician records list a practice address in West Haven
They are 84 of the 1,356 NPPES records with a practice address in West Haven, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in West Haven → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Horatiu Balas, M.D.West Haven, CT 065161720084320
- Christine Cheng, MDWest Haven, CT 065161598753980
- Mark Drabinski, M.D.West Haven, CT 065161811992902
- Benedict Fernando, M.D.West Haven, CT 065161932105624
- Glen Gechlik, MDWest Haven, CT 065161710972393
- Jurgen Holleck, M.D.West Haven, CT 065161811964257
- Avlin Imaeda, MDWest Haven, CT 065161851375612
- Laurence Knoll, MDWest Haven, CT 065161003886649
Common questions
What is Garth Oliver, M.D.'s NPI number?
Garth Oliver, M.D.'s National Provider Identifier (NPI) is 1285673145, issued on Jun 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Garth Oliver, M.D. located?
The NPPES record lists a practice address at 603 Savin Ave, West Haven, CT, 06516. Phone: (203) 932-2400. Providers update this record themselves, so call before visiting.
How can I verify Garth Oliver, M.D.'s license?
NPPES lists Connecticut license number 035510, 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 Garth Oliver, M.D. prescribe under Medicare Part D?
In 2024, Garth Oliver, M.D. had 1,399 Medicare Part D claims for 168 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.