NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1366472128 M.D.
Verify on CMS → Gary Koritzinsky, M.D.
Internal Medicine Physician in Washington, District of Columbia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 174,792 in Internal Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
3K
Medicare Part D claims · 230 beneficiaries · Internal Medicine Physician avg: 3K
What the federal data shows
Gary Koritzinsky, M.D. filed 3,234 Medicare Part D claims in 2024 as an Internal Medicine Physician in Washington, District of Columbia.
- 3K
- Part D claims, 2024
- ≥89th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Gary Koritzinsky, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1366472128), first enumerated 07/04/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 3,234 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Koritzinsky with other Internal Medicine Physician providers
Same primary specialty, same federal CMS NPPES roster.
All 935 Internal Medicine Physician providers in Washington, DC →
Also enrolled in District of Columbia
- Dr. Nawaf Abaalkhail, MD Washington, DC
- Hadeel Abdalla, MBBS Washington, DC
- Dr. Mohamed Abdelfattah, M.D Washington, DC
- Diena Abdelmaged Washington, DC
- Dr. Ahmed Abdulameer, MD Washington, DC
- Dr. Fozia Abdulwahabe, M.D Washington, DC
Other specialties in Washington: Home Health Aide (9,222) · Personal Care Attendant (5,508) · Case Manager/Care Coordinator (3,297) · Student in an Organized Health Care Education/Training Program (2,934)
CMS NPPES provider registry desk
NPI 1366472128 · Internal Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1366472128
- ENUM-LEGACY 2006
- TAX-MEGA 175K Internal Medicine
- RX-MID 3,234
- BOOK-LIGHT 943 in District of Columbia
- PHOTO-ENUM Srinivas Subramanian… · 2006
Gary Koritzinsky, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
3,234 ≥ 89th percentile 89% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
◑
Board-eligible specialty (heuristic, not verified)
Gary Koritzinsky, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Gary Koritzinsky, M.D.?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
3,234 16% vs specialty avg
Specialty distribution in District of Columbia
How Internal Medicine Physician compares to other specialties among District of Columbia providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Internal Medicine Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1366472128 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/04/2006 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
3,234
Total Claims
$314K
Total Drug Cost
230
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,951.933
- Total Day Supply
- 231,515
- Generic Drug Cost
- $84K
- Opioid Claims
- 30 (0.9% rate)
- Antibiotic Claims
- 134
Patient Demographics
- Average Patient Age
- 78.3 years
- Avg HCC Risk Score
- 0.83
- Gender Split
- 44% female / 56% male
- Age Distribution
- <65: 0, 65-74: 81, 75-84: 104, 85+: 45
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Gary Koritzinsky, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
315 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
181 claims
- Amlodipine Besylate
Amlodipine Besylate
128 claims
- Ezetimibe
Ezetimibe
127 claims
- Tamsulosin Hcl 94
Tamsulosin Hcl
94 claims
- Metoprolol Succinate 71
Metoprolol Succinate
71 claims
- Eliquis 70
Eliquis
70 claims
- Levothyroxine Sodium 62
Levothyroxine Sodium
62 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 315 |
| Rosuvastatin Calcium | 181 |
| Amlodipine Besylate | 128 |
| Ezetimibe | 127 |
| Tamsulosin Hcl | 94 |
| Metoprolol Succinate | 71 |
| Eliquis Apixaban | 70 |
| Levothyroxine Sodium | 62 |
| Celecoxib | 57 |
| Gabapentin | 52 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Internal Medicine Physician in DC →
All providers in District of Columbia →
Compare specialties →
Internal Medicine Physician Overview
How Gary Koritzinsky, M.D. fits within the Internal Medicine Physician landscape nationally.
174,792
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,785
Avg Claims per Provider
Gary Koritzinsky, M.D.'s 3,234 claims are above the specialty average of 2,785.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Koritzinsky, both outside District of Columbia so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Internal Medicine Physician Providers in District of Columbia
Other clinicians with the same primary specialty enrolled in District of Columbia, drawn from the same CMS NPPES roster as Koritzinsky.
One of 943 Internal Medicine Physician providers enrolled in District of Columbia, 11 are shown on this page.
Syed Hasan Raza Abidi
MBBS
Washington, DC
Dr. Randi Abramson
MD
Washington, DC
Dr. Khadega Abuelgasim Ahmed
M.D
Washington, DC
Ahmed Abughaban
Washington, DC
Dr. Dana Ackerly
M.D.
Washington, DC
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Gary Koritzinsky, M.D.'s specialty? ▼
Gary Koritzinsky, M.D. specializes in Internal Medicine Physician and practices in Washington, District of Columbia. Credentials: M.D..
How much does Gary Koritzinsky, M.D. prescribe under Medicare Part D? ▼
In 2024, Gary Koritzinsky, M.D. wrote 3,234 Medicare Part D claims totaling $314K in drug costs for 230 beneficiaries.
Where is Gary Koritzinsky, M.D. located? ▼
Gary Koritzinsky, M.D. is located at 2021 K ST NW STE 520, Washington, DC, 20006. Phone: (202) 466-4016.
What is Gary Koritzinsky, M.D.'s NPI number? ▼
Gary Koritzinsky, M.D.'s National Provider Identifier (NPI) is 1366472128, issued on 07/04/2006.
Does Gary Koritzinsky, M.D. prescribe opioids? ▼
Yes, Gary Koritzinsky, M.D. had 30 opioid claims in 2024 with an opioid prescribing rate of 0.9%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 174,792 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,785 Medicare Part D claims per year.
What drugs does Gary Koritzinsky, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Gary Koritzinsky, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Rosuvastatin Calcium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gary Koritzinsky, M.D. accept Medicare? ▼
Gary Koritzinsky, M.D. appears in CMS Medicare data with 3,234 Part D claims and 230 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gary Koritzinsky, M.D.'s credentials? ▼
Gary Koritzinsky, M.D.'s NPI is 1366472128 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.