Frank J. Kessler, M.D.
Internal Medicine Physician · Brewster, NY
Frank J. Kessler, M.D. is an internal medicine physician with a practice address in Brewster, New York, and NPI 1679500086, issued on Jun 28, 2006. Check the license (New York 165978, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Frank J. Kessler
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 165978 NY
026499 CT
Self-reported in NPPES; status is on the state search - Practice location
- 3423 Danbury RD, Brewster, NY 10509
- Phone
- (845) 279-7200
- Enumerated
- Jun 28, 2006
- Record last updated
- Sep 17, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20061222000043); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 1983
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 3423 Danbury RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Eleonor EustaceInternal Medicine Physician1558723809
- Matthew KesslerInternal Medicine Physician1720405194
- Mina Makar, MDInternal Medicine Physician1952046054
- Michele Mannion, M.D.Internal Medicine Physician1083896906
- Jeffrey Michaelis, M.D.Internal Medicine Physician1902834369
- Teena Thomas, MDInternal Medicine Physician1447838107
Verify Frank J. Kessler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 165978Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.1 times the Medicare Part D claims of the average internal medicine physician in 2024
9,886 Medicare Part D claims for 995 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 339 claims were for opioids.
Most prescribed
- Amlodipine Besylate483 claims
- Atorvastatin Calcium467 claims
- Rosuvastatin Calcium404 claims
- Levothyroxine Sodium382 claims
- Losartan Potassium335 claims
- Metoprolol Succinate307 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.
The MIPS final score for 2023 (Medicare payment program): 94.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Eastern New York Medical Services PCBrewster, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Frank J. Kessler among 12,067 internal medicine physician records in New York
Frank J. Kessler, M.D. is one of 12,067 internal medicine physician records with a practice address in New York. 79% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1983 · median 2002 among the 7,221 with a school on file
- Record last updated2020 · 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 New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 internal medicine physician records list a practice address in Brewster
They are 21 of the 577 NPPES records with a practice address in Brewster, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Brewster → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Arbie Baccay, MDBrewster, NY 105091548213374
- Martha Bouchard, M.D.Brewster, NY 105091467439893
- Thomas Burnette, MDBrewster, NY 105091609829878
- Paul Chang, M.D.Brewster, NY 105091285611566
- Nilo Herrera, MDBrewster, NY 105091932108834
- Izabela Kozicz, MDBrewster, NY 105091760469118
- Paul Mangiafico, MDBrewster, NY 105091326094103
- Matthew Mannini, DOBrewster, NY 105091386699577
Common questions
What is Frank J. Kessler, M.D.'s NPI number?
Frank J. Kessler, M.D.'s National Provider Identifier (NPI) is 1679500086, issued on Jun 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Frank J. Kessler, M.D. located?
The NPPES record lists a practice address at 3423 Danbury RD, Brewster, NY, 10509. Phone: (845) 279-7200. Providers update this record themselves, so call before visiting.
How can I verify Frank J. Kessler, M.D.'s license?
NPPES lists New York license number 165978, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Frank J. Kessler, M.D. prescribe under Medicare Part D?
In 2024, Frank J. Kessler, M.D. had 9,886 Medicare Part D claims for 995 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Frank J. Kessler, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.2 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.