Andrew Johnston, MD, PHD
Dermatology Physician · New Haven, CT
Andrew Johnston, MD, PHD is a dermatology physician with a practice address in New Haven, Connecticut, and NPI 1497384796, issued on Apr 7, 2020. Check the license (Connecticut 77276, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Andrew Johnston
- Credential
- MD, PHD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- 77276 CT
Self-reported in NPPES; status is on the state search - Practice location
- 20 York St, New Haven, CT 06510
- Phone
- (203) 688-4242
- Enumerated
- Apr 7, 2020
- Record last updated
- Jun 24, 2024
- Medicare enrollment
- Enrolled (PECOS I20240708002719); accepts Medicare assignment
- Medical or professional school
- Albert Einstein College Of Medicine Of Yeshiva University, 2020
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 253 in Connecticut → Look up another NPI →
Also registered at 20 York St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ali Abboud, MD, MBAStudent in an Organized Health Care Education/Training Program1942943097
- Basil Abdalla, MDStudent in an Organized Health Care Education/Training Program1154905057
- Jasmina AbdallaStudent in an Organized Health Care Education/Training Program1700638590
- Sarah AbdallahPsychiatry Physician1740800952
- Usama Abdelghany, PHARM DOncology Pharmacist1548827843
Verify Andrew Johnston in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 77276Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average dermatology physician in 2024
80 Medicare Part D claims for 42 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D.
Most prescribed
- Ketoconazole27 claims
- Triamcinolone Acetonide11 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.
Bills Medicare through one group practice
- Yale UniversityMiddlebury, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew Johnston among 253 dermatology physician records in Connecticut
Andrew Johnston, MD, PHD is one of 253 dermatology physician records with a practice address in Connecticut. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 91% of them.
- NPI issued2020 · 91% of these records are older, 7% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2020 · median 2004 among the 180 with a school on file
- Record last updated2024 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in Connecticut
There are 253 dermatology physician records in Connecticut.
All 253 in Connecticut → Every provider in New Haven → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Jean Bolognia, MDNew Haven, CT 065101942291331
- Irwin Braverman, MDNew Haven, CT 065101669453445
- Christopher Bunick, M.D., PH.D.New Haven, CT 065101457527442
- Sean Christensen, MDNew Haven, CT 065101962685073
- Shawn Cowper, MDNew Haven, CT 065101396736773
- Richard Edelson, MDNew Haven, CT 065101639160013
- Michael Girardi, MDNew Haven, CT 065101154302842
- Peter Heald, MDNew Haven, CT 065101376534784
Common questions
What is Andrew Johnston, MD, PHD's NPI number?
Andrew Johnston, MD, PHD's National Provider Identifier (NPI) is 1497384796, issued on Apr 7, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Johnston, MD, PHD located?
The NPPES record lists a practice address at 20 York St, New Haven, CT, 06510. Phone: (203) 688-4242. Providers update this record themselves, so call before visiting.
How can I verify Andrew Johnston, MD, PHD's license?
NPPES lists Connecticut license number 77276, 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 Andrew Johnston, MD, PHD prescribe under Medicare Part D?
In 2024, Andrew Johnston, MD, PHD had 80 Medicare Part D claims for 42 beneficiaries; the average among dermatology physician prescribers was 797. 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.