Neurosurgery
Arachnoid CystsCraniosynostosesNeuroendoscopy
Dr. Gregory G. Gerras, MD
NPI1508933490
- Part D claims, 2024
- 15
- Publications
- 2
- Hospital affiliations
- 2
- Industry payments
- $307
- Medical group
- 1
- Practice address
- 3440 E La Palma Ave, Anaheim, CA 92806
- Practice phone
- Call (714) 279-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Gerras' professional email, personal email and mobile number
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Dr. Gregory G. Gerras is a neurosurgeon in Anaheim, California
Dr. Gerras practices at Orange County - Anaheim Medical Center in Anaheim, California, part of Kaiser Permanente.
Dr. Gerras' NPI, 1508933490, was assigned on November 29, 2006. Dr. Gerras graduated from Wayne State University School Of Medicine in 1986. Dr. Gerras holds California license G74743.
NPI and contact details
- NPI
- 1508933490NPI Registry (opens in a new tab)
- NPI enumeration date
- November 29, 2006
- NPI status
- Active
- Practice phone
- (714) 279-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Gregory G. Gerras practices at Orange County - Anaheim Medical Center in Anaheim, California
Dr. Gerras' primary practice is Orange County - Anaheim Medical Center, at 3440 E La Palma Ave, Anaheim, CA 92806 in Orange County. The practice phone is (714) 279-4000.
- Orange County - Anaheim Medical Center3440 E La Palma Ave, Anaheim, CA 92806 · Orange CountyPhone(714) 279-4000
Source: Dmand AI Affiliation Data
Dr. Gregory G. Gerras is affiliated with 2 sites of care and 1 medical group
Dr. Gerras' primary practice is Orange County - Anaheim Medical Center in Anaheim, California, part of Kaiser Permanente. Dr. Gerras is also affiliated with Kaiser Permanente Zion Medical Center. The medical group on file is Southern California Permanente Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory G. Gerras' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gerras practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Orange County - Anaheim Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory G. Gerras is one of 846 neurosurgeons in California
Neurological surgery is Dr. Gerras' primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dr. Gerras is board certified in neurological surgery by the American Board of Neurological Surgery. Dmand AI has Dr. Gerras' licenses on file in 2 states: California and Michigan.
Specialties and state licenses
- Neurological surgery, CaliforniaPrimary
- Michigan license
Neurosurgeons near Dr. Gerras
Counts of neurosurgeons with a Dmand AI profile, by place and practice. Each opens the list.
846neurosurgeons in California
9neurosurgeons in Anaheim
4neurosurgeons at Orange County - Anaheim Medical CenterSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory G. Gerras' patients have a median age of 67
Across all payers, Dmand AI patient panel data puts Dr. Gerras' median patient age at 67, with 83% women.
Dr. Gerras' 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
- Women83%
- Men17%
Source: Dmand AI Patient Panel Data
Dr. Gregory G. Gerras wrote 15 Medicare Part D claims in 2024
In 2024, Dr. Gerras wrote 15 Medicare Part D claims for 13 patients. 100% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $100 in total drug cost. In 2020, CMS named 15 claims across 1 drug.
Part D claims, 202415
Drugs named by CMS1
Total drug cost$100
Part D patients13
Dr. Gerras' 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.
Drug classes CMS tracks in Dr. Gerras' Part D claims, 2024
- Opioids80%12 of 15 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2020 to 2022
- 2020
- 2022
- Claims for drugs CMS names
- 2020: 152022: 1220%
Drugs named by CMS: 1 in 2022, 1 in 2020.
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 G. Gerras has 2 publications on record
Dmand AI links 2 papers to Dr. Gerras. Dr. Gerras' most frequent co-authors are Henry E. Aryan, FACS, MD, Rahul Jandial, MD, PhD and Michael Lee Levy, MD.
Papers2
Dr. Gerras' most frequent co-authors
- Henry E. Aryan, FACS, MD1 shared paper
- Rahul Jandial, MD, PhD1 shared paper
- Michael Lee Levy, MD1 shared paper
Recent publications by Dr. Gerras
J Neuroimmunol
AntibodiesAntigensAntigens, Bacterial
See who Dr. Gerras researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gerras 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. Gregory G. Gerras received $307 in industry payments in 2024
CMS Open Payments shows 3 general payments to Dr. Gerras from 3 drug and device companies in 2024. Food and beverage make up the largest share, 100% of the total. AxoGen paid the most, $193.
Companies that paid Dr. Gerras the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory G. Gerras has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Gerras, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Gerras
- 2011
- CMS Stage 1 2012
- Undated
- AANS Fellow
Source: Dmand AI Professional Profile Data
Dr. Gregory G. Gerras graduated from Wayne State University School Of Medicine
Dr. Gerras graduated from Wayne State University School Of Medicine in 1986. Dr. Gerras is a member of AANS and CNS.
- Medical school
- Board certified in neurological surgery
Source: Dmand AI Professional Profile Data
Dr. Gregory G. Gerras accepts plans from 2 insurance carriers
Dr. Gerras is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Gerras accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Gregory G. Gerras'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 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) |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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 G. Gerras
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 G. Gerras' NPI number?
Dr. Gregory G. Gerras' NPI number is 1508933490. It was assigned on November 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory G. Gerras?
Dr. Gregory G. Gerras is a neurosurgeon in Anaheim, California. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).
Where does Dr. Gregory G. Gerras practice?
Dr. Gerras practices at 3440 E La Palma Ave, Anaheim, CA 92806. Dr. Gerras' primary practice is Orange County - Anaheim Medical Center in Anaheim, California, part of Kaiser Permanente.
What is Dr. Gregory G. Gerras' office phone number?
The practice phone on file for Dr. Gerras is (714) 279-4000.
What is Dr. Gregory G. Gerras' medical license number?
Dr. Gerras holds California license G74743, one of the licenses on file in 2 states.
Which states has Dr. Gregory G. Gerras been licensed in?
Dmand AI has state licenses on file for Dr. Gerras in California (1992 to 2026) and Michigan (1991 to 1998).
Which hospitals is Dr. Gregory G. Gerras affiliated with?
Dr. Gerras practices at Orange County - Anaheim Medical Center in Anaheim, California. Dr. Gerras is also affiliated with Kaiser Permanente Zion Medical Center.
What medical group is Dr. Gregory G. Gerras part of?
Dr. Gerras is linked to Southern California Permanente Medical Group.
Is Dr. Gregory G. Gerras board certified?
Yes. Dr. Gerras is board certified in neurological surgery by the American Board of Neurological Surgery.
Where did Dr. Gregory G. Gerras go to medical school?
Dr. Gerras graduated from Wayne State University School Of Medicine in 1986.
Show 6 more questionsShow fewer questions
What drugs does Dr. Gregory G. Gerras prescribe most?
In 2022 Medicare Part D data, Dr. Gerras' most prescribed drugs by claims were Hydrocodone-Acetaminophen.
Has Dr. Gregory G. Gerras received payments from drug or device companies?
CMS Open Payments shows $307 in general payments to Dr. Gerras from 3 companies from 2024 to 2024. The largest total came from AxoGen.
How long has Dr. Gregory G. Gerras been practicing?
Dr. Gerras graduated from medical school in 1986, 40 years ago.
Does Dr. Gregory G. Gerras do research?
Dmand AI links 2 publications to Dr. Gerras.
Who does Dr. Gregory G. Gerras publish with?
Dr. Gerras' most frequent co-authors are Henry E. Aryan, FACS, MD (1 shared paper), Rahul Jandial, MD, PhD (1 shared paper) and Michael Lee Levy, MD (1 shared paper).
What insurance does Dr. Gregory G. Gerras accept?
Dr. Gerras is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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