Jason Kessler, MD
Infectious Disease Physician · Morristown, NJ
Jason Kessler, MD is an infectious disease physician with a practice address in Morristown, New Jersey, and NPI 1255598850, issued on May 21, 2008. Check the license (New Jersey 25MA09835400, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Jason Kessler
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License numbers
- 25MA09835400 NJ
243163 NY
Self-reported in NPPES; status is on the state search - Practice location
- 435 South St Ste 210, Morristown, NJ 07960
- Phone
- (973) 971-7165
- Enumerated
- May 21, 2008
- Record last updated
- Sep 6, 2022
- Fax
- (973) 290-7675
- Medicare enrollment
- Enrolled (PECOS I20160406001114); accepts Medicare assignment
- Medical or professional school
- State University Of New York Downstate Medical Center, 2000
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 375 in New Jersey → Look up another NPI →
Also registered at 435 South St Ste 210
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Riddhima Issar, DOInternal Medicine Physician1093401846
- Abdalla Mohamed, MDGastroenterology Physician1174079990
- Tara SmithAdult Health Nurse Practitioner1306725676
Verify Jason Kessler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA09835400Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average infectious disease physician in 2024
364 Medicare Part D claims for 50 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 66% of claims.
Most prescribed
- Dovato47 claims
- Biktarvy45 claims
- Juluca38 claims
- Tivicay36 claims
- Odefsey22 claims
- Triumeq20 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.
Industry payments in 2024: $397.12
9 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 3,895 providers of this specialty with any payment received $4,362.19 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.
Bills Medicare through one group practice
- Practice Associates Medical GroupMorristown, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jason Kessler among 375 infectious disease physician records in New Jersey
Jason Kessler, MD is one of 375 infectious disease physician records with a practice address in New Jersey. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 58% of them.
- NPI issued2008 · 58% of these records are older, 35% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2000 · median 2000 among the 285 with a school on file
- Record last updated2022 · 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 207RI0200X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in New Jersey
There are 375 infectious disease physician records in New Jersey.
All 375 in New Jersey → Every provider in Morristown → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Max Deshaw, M.D.Morristown, NJ 079601508808940
- Usharani Natarajan, M.D.Morristown, NJ 079601487620456
- Olena Stepanyuk, MDMorristown, NJ 079601861690380
- Christina Cloke, MDWhippany, NJ 079811306254289
- Manal Youssef-Bessler, M.D.Whippany, NJ 079811649236027
- James Felser, M.D.East Hanover, NJ 079361821335043
- Kamal Hamed, M.D.East Hanover, NJ 079361679747844
- Stuart Burstin, MDFlorham Park, NJ 079321528107588
Common questions
What is Jason Kessler, MD's NPI number?
Jason Kessler, MD's National Provider Identifier (NPI) is 1255598850, issued on May 21, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Jason Kessler, MD located?
The NPPES record lists a practice address at 435 South St Ste 210, Morristown, NJ, 07960. Phone: (973) 971-7165. Providers update this record themselves, so call before visiting.
How can I verify Jason Kessler, MD's license?
NPPES lists New Jersey license number 25MA09835400, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jason Kessler, MD prescribe under Medicare Part D?
In 2024, Jason Kessler, MD had 364 Medicare Part D claims for 50 beneficiaries; the average among infectious disease physician prescribers was 689. 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.