David Christopher Greczek, PA-C
- Medicare services, 2024
- 353
- Medicare patients, 2024
- 121
- Part D claims, 2024
- 561
- MIPS score, 2024
- 100
- Industry payments
- $72
- Practice address
- 1 Research Rd, Ridge, NY 11961
- Practice phone
- Call (631) 751-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Port Jefferson Station Medical Oncology
Multi-specialty group site · Ridge, New York
Find David Greczek's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
David Christopher Greczek is a physician assistant in Ridge, New York
David Greczek practices at Port Jefferson Station Medical Oncology in Ridge, New York.
David Greczek's NPI, 1649990060, was assigned on August 29, 2022. David Greczek holds New York license 028743.
- NPI
- 1649990060NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6002263878
- NPI enumeration date
- August 29, 2022
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (631) 751-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 30
- Medical school graduation
- 2022
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
David Christopher Greczek practices at Port Jefferson Station Medical Oncology in Ridge, New York
David Greczek's primary practice is Port Jefferson Station Medical Oncology, at 1 Research Rd, Ridge, NY 11961. The practice phone is (631) 751-3000.
- Port Jefferson Station Medical Oncology1 Research Rd, Ridge, NY 11961Phone(631) 751-3000
Source: Dmand AI Affiliation Data
David Christopher Greczek is affiliated with 1 site of care and 2 medical groups
David Greczek's primary practice is Port Jefferson Station Medical Oncology in Ridge, New York. The medical group on file is New York Cancer & Blood Specialists. Dmand AI also links David Greczek to 1 more medical group, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at David Christopher Greczek's practice
Dmand AI tracks the electronic health record (EHR) system at each site where David Greczek practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Port Jefferson Station Medical Oncology | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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David Christopher Greczek is one of 11,456 physician assistants in New York
Physician assistant is David Greczek's primary specialty in the NPI Registry, under taxonomy code 363A00000X. David Greczek is licensed in New York.
Specialties and state licenses
- Physician assistant, New YorkPrimary
Physician assistants near David Greczek
Counts of physician assistants with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
David Christopher Greczek billed Medicare for 353 services in 2024
CMS data shows 353 Medicare services from David Greczek across 11 procedure codes in 2024, for 121 Medicare patients. Medicare paid $19,372 for them. Every service was in an office.
David Greczek's Medicare services by type, 2024
- Office and hospital visits135
- Surgery133
- Lab and pathology55
- Other services16
- Imaging14
David Greczek compared with the New York median for physician assistants, 2024
- David Greczek
- New York median
- Medicare services
- 353vs 1762.0 times
- Medicare patients
- 121vs 7855% above
- Part D claims
- 450vs 24584% above
Medians across 6,477 physician assistants in New York with Dmand AI profiles that report each measure.
David Greczek's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
David Christopher Greczek treated 121 Medicare patients in 2024, average age 74
CMS counts 121 Medicare patients who saw David Greczek in 2024. The largest group is 65 to 74, with 61 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 30% are also on Medicaid. Their average risk score is 1.32, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts David Greczek's median patient age at 67, with 24% women.
David Greczek's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
David Greczek's Medicare patients by sex, 2024
- Women1512%
- Men10688%
Chronic conditions among David Greczek's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes46%
- Arthritis43%
- Ischemic heart disease40%
- Cancer27%
- Chronic kidney disease26%
- Mood disorders19%
Share of Medicare patients with each condition. A patient can have several.
David Greczek's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women24%
- Men73%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
David Christopher Greczek wrote 561 Medicare Part D claims in 2024
In 2024, David Greczek wrote 561 Medicare Part D claims for 334 patients. 92% of them were for generic drugs. CMS names the drug for 450 of them, across 11 drugs with 11 or more claims each, at $38,605 in total drug cost.
David Greczek's Part D claims by kind of drug, 2024
- Generic514 claims92%
- Brand-name47 claims8%
David Greczek's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in David Greczek's Part D claims, 2024
- Antibiotics29%161 of 561 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
David Christopher Greczek scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for David Greczek for performance year 2024, reported as part of a group. David Greczek accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists David Greczek as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
David Greczek's MIPS scores, performance year 2024
- 100of 100Final score
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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David Christopher Greczek received $72 in industry payments in 2025
CMS Open Payments shows 4 general payments to David Greczek from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Sumitomo Pharma America, Inc. paid the most, $56.
Companies that paid David Greczek the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for David Christopher Greczek's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about David Christopher Greczek
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is David Christopher Greczek's NPI number?
David Christopher Greczek's NPI number is 1649990060. It was assigned on August 29, 2022, and it is active in the NPI Registry.
What does David Christopher Greczek specialize in?
David Christopher Greczek is a physician assistant in Ridge, New York. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does David Christopher Greczek practice?
David Greczek practices at 1 Research Rd, Ridge, NY 11961. David Greczek's primary practice is Port Jefferson Station Medical Oncology in Ridge, New York. Dmand AI also links David Greczek to 1 medical group.
What is David Christopher Greczek's office phone number?
The practice phone on file for David Greczek is (631) 751-3000.
What is David Christopher Greczek's medical license number?
David Greczek holds New York license 028743.
What medical group is David Christopher Greczek part of?
David Greczek is linked to New York Cancer & Blood Specialists. Dmand AI links David Greczek to 1 more medical group.
Does David Christopher Greczek accept Medicare?
Yes. CMS data shows David Greczek billed Medicare for 353 services in 2024, and David Greczek accepts Medicare assignment.
Does David Christopher Greczek offer telehealth?
Yes. The CMS Doctors and Clinicians file lists David Greczek as offering telehealth services.
What is David Christopher Greczek's MIPS score?
David Greczek's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
How many Medicare patients does David Christopher Greczek see?
CMS counts 121 Medicare patients who saw David Greczek in 2024, with an average age of 74.
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What services does David Christopher Greczek bill to Medicare?
In 2024, David Greczek's most billed Medicare services were office visit, established patient (99214), lab and pathology test (81002) and care management and other visits (99442).
What drugs does David Christopher Greczek prescribe most?
In 2024 Medicare Part D data, David Greczek's most prescribed drugs by claims were Tamsulosin HCl, Cefuroxime and Finasteride.
Has David Christopher Greczek received payments from drug or device companies?
CMS Open Payments shows $72 in general payments to David Greczek from 2 companies from 2025 to 2025. The largest total came from Sumitomo Pharma America, Inc.
How long has David Christopher Greczek been practicing?
David Greczek graduated from medical school in 2022, 4 years ago.
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