Dr. Gregory Mark Closkey, MD
- Medicare services, 2022
- 215
- Part D claims, 2024
- 22
- Industry payments
- $645
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 830 Old Lancaster Rd, Bryn Mawr, PA 19010
- Practice phone
- Call (610) 525-8110
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Bryn Mawr Nephrology Assoc
Primary care practice · Bryn Mawr, Pennsylvania
Find Dr. Closkey's professional email, personal email and mobile number
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Dr. Gregory Mark Closkey is a nephrologist in Wayne, Pennsylvania
Dr. Closkey practices at Bryn Mawr Nephrology Assoc in Bryn Mawr, Pennsylvania.
Dr. Closkey's NPI, 1942223573, was assigned on July 25, 2006. Dr. Closkey graduated from Georgetown University School of Medicine in 1978. Dr. Closkey holds Pennsylvania license MD038267L.
- NPI
- 1942223573NPI Registry (opens in a new tab)
- NPI enumeration date
- July 25, 2006
- NPI status
- Active
- Practice phone
- (610) 525-8110
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory Mark Closkey practices in Bryn Mawr and Wayne
Dr. Closkey's primary practice is Bryn Mawr Nephrology Assoc, at 830 Old Lancaster Rd, Bryn Mawr, PA 19010. The practice phone is (610) 525-8110. The NPI Registry lists Dr. Closkey's practice address as 656 E Swedesford Rd, Wayne, PA 19087.
- Bryn Mawr Nephrology AssocPrimary830 Old Lancaster Rd, Bryn Mawr, PA 19010Phone(610) 525-8110
- NPI Registry address656 E Swedesford Rd, Wayne, PA 19087 · Delaware CountyPhone(610) 525-8110
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Gregory Mark Closkey is affiliated with 1 site of care and 1 medical group
Dr. Closkey's primary practice is Bryn Mawr Nephrology Assoc in Bryn Mawr, Pennsylvania. The medical group on file is Bryn Mawr Medical Specialists Association (BMMSA), Nephrology.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Gregory Mark Closkey's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Closkey practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Bryn Mawr Nephrology Assoc | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory Mark Closkey is one of 552 nephrologists in Pennsylvania
Nephrology is Dr. Closkey's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Closkey is licensed in Pennsylvania.
Specialties and state licenses
- Nephrology, PennsylvaniaPrimary
Nephrologists near Dr. Closkey
Counts of nephrologists 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
Dr. Gregory Mark Closkey billed Medicare for 215 services in 2022
CMS data shows 215 Medicare services from Dr. Closkey across 4 procedure codes in 2022. Medicare paid $46,018 for them.
Dr. Closkey's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Tests and treatments
- 2021: 2422022: 15337%
- Office and hospital visits
- 2021: 4312022: 6286%
Where Dr. Closkey's Medicare services took place, 2022
- In an office9846%
- In a facility11754%
Dr. Closkey compared with the Pennsylvania median for nephrologists, 2022
- Dr. Closkey
- Pennsylvania median
- Medicare services
- 215vs 77272% below
- Part D claims
- 133vs 55276% below
Medians across 548 nephrologists in Pennsylvania with Dmand AI profiles that report each measure.
Dr. Closkey's most billed Medicare procedure codes, 2022
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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Closkey and other nephrologists in Pennsylvania.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory Mark Closkey's patients have a median age of 72
Across all payers, Dmand AI patient panel data puts Dr. Closkey's median patient age at 72, with 100% women.
Dr. Closkey's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. Gregory Mark Closkey wrote 22 Medicare Part D claims in 2024
In 2024, Dr. Closkey wrote 22 Medicare Part D claims. 100% of them were for generic drugs. They cover 9 drugs, with $3,931 in total drug cost. In 2021, CMS named 340 claims across 14 drugs.
Dr. Closkey's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 3402022: 13361%
Drugs named by CMS: 9 in 2022, 14 in 2021.
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
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Dr. Gregory Mark Closkey received $645 in industry payments from 2016 to 2022
CMS Open Payments shows 29 general payments to Dr. Closkey from 9 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 98% of the total. AstraZeneca Pharmaceuticals LP paid the most, $273. It also lists 1 research payment totaling $125 in 2018.
General payments to Dr. Closkey by program year, 2016 to 2022
General payments to Dr. Closkey by kind, 2016 to 2022
- Food and beverage$63498%
- Education$112%
Companies that paid Dr. Closkey the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory Mark Closkey graduated from Georgetown University School of Medicine
Dr. Closkey graduated from Georgetown University School of Medicine in 1978.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory Mark Closkey'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 Data |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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 Dr. Gregory Mark Closkey
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory Mark Closkey's NPI number?
Dr. Gregory Mark Closkey's NPI number is 1942223573. It was assigned on July 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Mark Closkey?
Dr. Gregory Mark Closkey is a nephrologist in Wayne, Pennsylvania. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Gregory Mark Closkey practice?
Dr. Closkey practices at 830 Old Lancaster Rd, Bryn Mawr, PA 19010. Dr. Closkey also practices at 656 E Swedesford Rd, Wayne, PA 19087. Dr. Closkey's primary practice is Bryn Mawr Nephrology Assoc in Bryn Mawr, Pennsylvania.
What is Dr. Gregory Mark Closkey's office phone number?
The practice phone on file for Dr. Closkey is (610) 525-8110.
What is Dr. Gregory Mark Closkey's medical license number?
Dr. Closkey holds Pennsylvania license MD038267L.
What medical group is Dr. Gregory Mark Closkey part of?
Dr. Closkey is linked to Bryn Mawr Medical Specialists Association (BMMSA), Nephrology.
Does Dr. Gregory Mark Closkey accept Medicare?
Yes. CMS data shows Dr. Closkey billed Medicare for 215 services in 2022.
What services does Dr. Gregory Mark Closkey bill to Medicare?
In 2022, Dr. Closkey's most billed Medicare services were dialysis (90960), hospital inpatient care (99232) and hospital inpatient care (99231).
Where did Dr. Gregory Mark Closkey go to medical school?
Dr. Closkey graduated from Georgetown University School of Medicine in 1978.
What drugs does Dr. Gregory Mark Closkey prescribe most?
In 2022 Medicare Part D data, Dr. Closkey's most prescribed drugs by claims were Calcium Acetate, Atorvastatin Calcium and Losartan Potassium.
Has Dr. Gregory Mark Closkey received payments from drug or device companies?
CMS Open Payments shows $645 in general payments to Dr. Closkey from 9 companies from 2016 to 2022. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Gregory Mark Closkey been practicing?
Dr. Closkey graduated from medical school in 1978, 48 years ago.
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