AxotomyBrain ConcussionInterneurons
Dr. John E. Greer, MD, PhD
NPI1790122646PAC ID9234371147
- Medicare services, 2024
- 56
- Medicare patients, 2024
- 78
- Part D claims, 2024
- 39
- Publications
- 7
- MIPS score, 2024
- 84
- Practice address
- 1250 East Marshall Street, Richmond, VA 23298
- Practice phone
- Call (804) 828-9000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. John E. Greer is a neurosurgeon in Richmond, Virginia
Dr. Greer practices at VCU Medical Center in Richmond, Virginia, part of Commonwealth of Virginia.
Dr. Greer's NPI, 1790122646, was assigned on June 2, 2013. Dr. Greer graduated from Virginia Commonwealth University, School of Medicine in 2013. Dr. Greer holds Virginia license 0101268559.
NPI and contact details
- NPI
- 1790122646NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9234371147
- NPI enumeration date
- June 2, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (804) 828-9000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John E. Greer practices at VCU Medical Center in Richmond, Virginia
Dr. Greer's primary practice is VCU Medical Center, at 1250 East Marshall Street, Richmond, VA 23298 in Richmond City. The practice phone is (804) 828-9000.
- VCU Medical Center1250 East Marshall Street, Richmond, VA 23298 · Richmond CityPhone(804) 828-9000
Source: Dmand AI Affiliation Data
Dr. John E. Greer is affiliated with 3 sites of care and 1 medical group
Dr. Greer's primary practice is VCU Medical Center in Richmond, Virginia, part of Commonwealth of Virginia. Dr. Greer is also affiliated with Bon Secours Southside Medical Center. The medical group on file is MCV Physicians. Dmand AI also links Dr. Greer to 1 more urgent care center, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John E. Greer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greer practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| VCU Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John E. Greer is one of 166 neurosurgeons in Virginia
Neurological surgery is Dr. Greer's primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dr. Greer is licensed in Virginia.
Specialties and state licenses
- Neurological surgery, VirginiaPrimary
Neurosurgeons near Dr. Greer
Counts of neurosurgeons 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. John E. Greer billed Medicare for 56 services in 2024
CMS data shows 56 Medicare services from Dr. Greer across 3 procedure codes in 2024, for 78 Medicare patients. Medicare paid $2,684 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202456
Medicare patients78
Paid by Medicare$2,684
Procedure codes3
Dr. Greer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1012024: 5645%
Dr. Greer compared with the Virginia median for neurosurgeons, 2024
- Dr. Greer
- Virginia median
- Medicare services
- 56vs 32083% below
- Medicare patients
- 78vs 22265% below
- Part D claims
- 29vs 30Close to median
Medians across 151 neurosurgeons in Virginia with Dmand AI profiles that report each measure.
Dr. Greer'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
Dr. John E. Greer treated 78 Medicare patients in 2024, average age 72
CMS counts 78 Medicare patients who saw Dr. Greer in 2024. The largest group is 65 to 74, with 39 patients. 75% of them have arthritis, and 75% have high blood pressure. 15% are also on Medicaid. Their average risk score is 2.29, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Greer's median patient age at 68, with 48% women.
Medicare patients, 202478
Average age72
Average risk score2.29
Also on Medicaid15%
Dr. Greer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Greer's Medicare patients by sex, 2024
- Women3747%
- Men4153%
Chronic conditions among Dr. Greer's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Stroke or TIA49%
- Diabetes47%
- Mood disorders46%
- Depression41%
- Ischemic heart disease38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Greer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women48%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John E. Greer wrote 39 Medicare Part D claims in 2024
In 2024, Dr. Greer wrote 39 Medicare Part D claims for 21 patients. 100% of them were for generic drugs. CMS names the drug for 29 of them, across 2 drugs with 11 or more claims each, at $124 in total drug cost.
Part D claims, 202439
Drugs named by CMS2
Total drug cost$124
Part D patients21
Dr. Greer'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.
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
Dr. John E. Greer scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Greer for performance year 2024, reported as part of a group. Dr. Greer accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Greer as offering telehealth. CMS counts 31 procedures of spinal fusion by Dr. Greer, more than 45% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Greer's MIPS scores, performance year 2024
- 84of 100Final score
- 69.9of 100Quality
- 99of 100Promoting Interoperability
- 40of 100Improvement Activities
- 77of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Greer ranks in Medicare procedure volume
- Spinal fusion
- 45th percentile31 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Laminectomy or laminotomy (partial removal of spine bones): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. John E. Greer has 7 publications on record
Dmand AI links 7 papers to Dr. Greer, published from 2013 to 2022. The most frequent topics are Axons, Brain Injuries and Axotomy. Dr. Greer has published most often in J Neurosci. Dr. Greer's most frequent co-author is John Greer, MD.
Papers7
Years published2013 to 2022
Dr. Greer's papers by year, 2013 to 2022
Topics Dr. Greer writes about most
- Axons
- Brain Injuries
- Axotomy
- Disease Models, Animal
- Mice, Inbred C57BL
- Action Potentials
- Brain Concussion
- Mice, Transgenic
Dr. Greer's most frequent co-authors
Recent publications by Dr. Greer
Action PotentialsAxonsBrain Injuries
Traumatic brain injury-induced axonal phenotypes react differently to treatment (opens in a new tab)
Acta Neuropathol
Amyloid beta-Protein PrecursorAxonsBacterial Proteins
See who Dr. Greer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Greer works with, so you can find a warm path to the right neurosurgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John E. Greer received $13 in industry payments in 2020
CMS Open Payments shows 1 general payment to Dr. Greer from 1 drug or device company in 2020. Food and beverage make up the largest share, 100% of the total. CSL Behring paid the most, $13.
Companies that paid Dr. Greer the most, 2020 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John E. Greer graduated from Virginia Commonwealth University, School of Medicine
Dr. Greer graduated from Virginia Commonwealth University, School of Medicine in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John E. Greer'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 DataDmand AI Org Hierarchy 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. John E. Greer
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. John E. Greer's NPI number?
Dr. John E. Greer's NPI number is 1790122646. It was assigned on June 2, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. John E. Greer?
Dr. John E. Greer is a neurosurgeon in Richmond, Virginia. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).
Where does Dr. John E. Greer practice?
Dr. Greer practices at 1250 East Marshall Street, Richmond, VA 23298. Dr. Greer's primary practice is VCU Medical Center in Richmond, Virginia, part of Commonwealth of Virginia. Dmand AI also links Dr. Greer to 1 urgent care center.
What is Dr. John E. Greer's office phone number?
The practice phone on file for Dr. Greer is (804) 828-9000.
What is Dr. John E. Greer's medical license number?
Dr. Greer holds Virginia license 0101268559.
Which hospitals is Dr. John E. Greer affiliated with?
Dr. Greer practices at VCU Medical Center in Richmond, Virginia. Dr. Greer is also affiliated with Bon Secours Southside Medical Center.
What medical group is Dr. John E. Greer part of?
Dr. Greer is linked to MCV Physicians.
Does Dr. John E. Greer accept Medicare?
Yes. CMS data shows Dr. Greer billed Medicare for 56 services in 2024, and Dr. Greer accepts Medicare assignment.
Does Dr. John E. Greer offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Greer as offering telehealth services.
What is Dr. John E. Greer's MIPS score?
Dr. Greer's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. John E. Greer see?
CMS counts 78 Medicare patients who saw Dr. Greer in 2024, with an average age of 72.
What services does Dr. John E. Greer bill to Medicare?
In 2024, Dr. Greer's most billed Medicare services were office visit, established patient (99213), hospital inpatient care (99232) and office visit, established patient (99212).
Where did Dr. John E. Greer go to medical school?
Dr. Greer graduated from Virginia Commonwealth University, School of Medicine in 2013.
What drugs does Dr. John E. Greer prescribe most?
In 2024 Medicare Part D data, Dr. Greer's most prescribed drugs by claims were Chlorhexidine Gluconate and Mupirocin.
Has Dr. John E. Greer received payments from drug or device companies?
CMS Open Payments shows $13 in general payments to Dr. Greer from 1 company from 2020 to 2020. The largest total came from CSL Behring.
How long has Dr. John E. Greer been practicing?
Dr. Greer graduated from medical school in 2013, 13 years ago.
Does Dr. John E. Greer do research?
Dmand AI links 7 publications to Dr. Greer, published from 2013 to 2022.
Who does Dr. John E. Greer publish with?
Dr. Greer's most frequent co-authors are John Greer, MD (2 shared papers).
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