Charles Knirsch, M.D.
Internal Medicine Physician · Pearl River, NY
Charles Knirsch, M.D. is an internal medicine physician with a practice address in Pearl River, New York, and NPI 1134586480, issued on Jan 18, 2016. Check the license (New York 174364, as entered in NPPES) on the NYS Education Department, Office of the Professions; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Charles Knirsch
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 174364 NY
Self-reported in NPPES; status is on the state search - Practice location
- 401 N Middletown RD, Pearl River, NY 10965
- Phone
- (845) 602-3293
- Enumerated
- Jan 18, 2016
- Record last updated
- Jan 18, 2016 (not updated in 10 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 401 N Middletown RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Dorien Spatz, APNFamily Nurse Practitioner1275717639
Verify Charles Knirsch 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 174364Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Charles Knirsch among 12,067 internal medicine physician records in New York
Charles Knirsch, 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 not. Its NPI, issued in 2016, is newer than 77% of them.
- NPI issued2016 · 77% of these records are older, 20% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2016 · 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).
4 internal medicine physician records list a practice address in Pearl River
They are 4 of the 358 NPPES records with a practice address in Pearl River, and 12,067 internal medicine physician records in New York. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 12,067 in New York → Every provider in Pearl River → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Arthur Appel, M.D.Pearl River, NY 109651558355107
- Michele Leder, MDPearl River, NY 109651992771877
- Liviu Nastase, M.D.Pearl River, NY 109651922019165
- Fazlur Chowdhury, M.D.Orangeburg, NY 109621801956172
- Victor Jaworsky, M.D.Orangeburg, NY 109621528129285
- Alexander Medakovich, M.D.Orangeburg, NY 109621467587923
- Raja Posanipalli, M.D.Orangeburg, NY 109621518035633
- Premshree Posanipalli, M.D.Orangeburg, NY 109621508934613
Common questions
What is Charles Knirsch, M.D.'s NPI number?
Charles Knirsch, M.D.'s National Provider Identifier (NPI) is 1134586480, issued on Jan 18, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Charles Knirsch, M.D. located?
The NPPES record lists a practice address at 401 N Middletown RD, Pearl River, NY, 10965. Phone: (845) 602-3293. Providers update this record themselves, so call before visiting.
How can I verify Charles Knirsch, M.D.'s license?
NPPES lists New York license number 174364, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.