Gary M. Koritzinsky, M.D.
Internal Medicine Physician · Washington, DC
Gary M. Koritzinsky, M.D. is an internal medicine physician with a practice address in Washington, District of Columbia, and NPI 1366472128, issued on Jul 4, 2006. Check the license (District of Columbia MD15928, as entered in NPPES) on the District of Columbia Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Gary M. Koritzinsky
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD15928 DC
Self-reported in NPPES; status is on the state search - Practice location
- 2021 K St NW Ste 520, Washington, DC 20006
- Phone
- (202) 466-4016
- Enumerated
- Jul 4, 2006
- Record last updated
- Jul 15, 2023
- Fax
- (202) 293-4118
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 901 in District of Columbia → Look up another NPI →
Verify Gary M. Koritzinsky in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersDistrict of Columbia Board of Medicine
Search for license MD15928Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% more Medicare Part D claims than the average internal medicine physician in 2024
3,234 Medicare Part D claims for 230 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 30 claims were for opioids.
Most prescribed
- Atorvastatin Calcium315 claims
- Rosuvastatin Calcium181 claims
- Amlodipine Besylate128 claims
- Ezetimibe127 claims
- Tamsulosin Hcl94 claims
- Metoprolol Succinate71 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.
Gary M. Koritzinsky among 901 internal medicine physician records in District of Columbia
Gary M. Koritzinsky, M.D. is one of 901 internal medicine physician records with a practice address in District of Columbia. 73% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 67% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2023 · 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 District of Columbia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
891 internal medicine physician records list a practice address in Washington
They are 891 of the 45,857 NPPES records with a practice address in Washington, and 901 internal medicine physician records in District of Columbia.
All 901 in District of Columbia → Every provider in Washington → Internal Medicine Physician nationwide →
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- Kimberly Gaytan, PA CWashington, DC 200061427127570
- Thomas Hansson, M.D.Washington, DC 200061962414037
- Beth Horowitz, MDWashington, DC 200061134214950
- Asha Isable, MDWashington, DC 200061750363826
- Michael Newman, MDWashington, DC 200061508932377
- Matthew Parker, MDWashington, DC 200061629171269
Common questions
What is Gary M. Koritzinsky, M.D.'s NPI number?
Gary M. Koritzinsky, M.D.'s National Provider Identifier (NPI) is 1366472128, issued on Jul 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gary M. Koritzinsky, M.D. located?
The NPPES record lists a practice address at 2021 K St NW Ste 520, Washington, DC, 20006. Phone: (202) 466-4016. Providers update this record themselves, so call before visiting.
How can I verify Gary M. Koritzinsky, M.D.'s license?
NPPES lists District of Columbia license number MD15928, as entered by the provider. Search the District of Columbia Board of Medicine at https://dchealth.dc.gov/bomed. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gary M. Koritzinsky, M.D. prescribe under Medicare Part D?
In 2024, Gary M. Koritzinsky, M.D. had 3,234 Medicare Part D claims for 230 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.