Gregory Marshall, FNP-C
- Medicare services, 2024
- 547
- Medicare patients, 2024
- 117
- Part D claims, 2024
- 3,684
- Industry payments
- $260
- Affiliated sites
- 2
- Practice address
- 8805 N Meridian St, Indianapolis, IN 46260
- Practice phone
- Call (317) 706-7246
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Center for Special Surgery - Indianapolis
Surgery Center - Medicare-Certified · Indianapolis, Indiana
Find Gregory Marshall's professional email, personal email and mobile number
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Gregory Marshall is an interventional pain medicine physician in Indianapolis, Indiana
Gregory Marshall practices at Center for Special Surgery - Indianapolis in Indianapolis, Indiana.
Gregory Marshall's NPI, 1528555216, was assigned on April 18, 2018. Gregory Marshall graduated from Indiana University School of Medicine in 2017. Gregory Marshall holds Indiana license 71007920A.
- NPI
- 1528555216NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3577826668
- NPI enumeration date
- April 18, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (317) 706-7246
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Gregory Marshall practices at Center for Special Surgery - Indianapolis in Indianapolis, Indiana
Gregory Marshall's primary practice is Center for Special Surgery - Indianapolis, at 8805 N Meridian St, Indianapolis, IN 46260. The practice phone is (317) 706-7246.
- Center for Special Surgery - Indianapolis8805 N Meridian St, Indianapolis, IN 46260Phone(317) 706-7246
Source: Dmand AI Affiliation Data
Gregory Marshall is affiliated with 2 sites of care and 1 medical group
Gregory Marshall's primary practice is Center for Special Surgery - Indianapolis in Indianapolis, Indiana. The medical group on file is Center for Pain Management. Dmand AI also links Gregory Marshall to 1 more ambulatory surgery center, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Gregory Marshall's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gregory Marshall practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Center for Special Surgery - Indianapolis | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Gregory Marshall is one of 69 interventional pain medicine physicians in Indiana
Interventional pain medicine is Gregory Marshall's primary specialty in the NPI Registry, under taxonomy code 208VP0014X. Gregory Marshall is licensed in Indiana.
Specialties and state licenses
- Interventional pain medicine, IndianaPrimary
Interventional pain medicine physicians near Gregory Marshall
Counts of interventional pain medicine physicians 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
Gregory Marshall billed Medicare for 547 services in 2024
CMS data shows 547 Medicare services from Gregory Marshall across 2 procedure codes in 2024, all of them office visits, for 117 Medicare patients. Medicare paid $35,765 for them. Every service was in an office.
Gregory Marshall's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7842024: 54730%
Gregory Marshall compared with the Indiana median for interventional pain medicine physicians, 2024
- Gregory Marshall
- Indiana median
- Medicare services
- 547vs 1,48363% below
- Medicare patients
- 117vs 26255% below
- Part D claims
- 3,564vs 1,7102.1 times
Medians across 68 interventional pain medicine physicians in Indiana with Dmand AI profiles that report each measure.
Gregory Marshall'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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Medicare shows one payer. Book a meeting to get commercial claims data for Gregory Marshall and other interventional pain medicine physicians in Indiana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Gregory Marshall treated 117 Medicare patients in 2024, average age 67
CMS counts 117 Medicare patients who saw Gregory Marshall in 2024. The largest group is 65 to 74, with 54 patients. 75% of them have arthritis, and 74% have high blood pressure. 36% are also on Medicaid. Their average risk score is 1.35, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Gregory Marshall's median patient age at 65, with 60% women.
Gregory Marshall's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Gregory Marshall's Medicare patients by sex, 2024
- Women7161%
- Men4639%
Chronic conditions among Gregory Marshall's Medicare patients, 2024
- Arthritis75%
- High blood pressure74%
- High cholesterol68%
- Anxiety50%
- Mood disorders45%
- Depression41%
- Diabetes35%
- COPD32%
Share of Medicare patients with each condition. A patient can have several.
Gregory Marshall's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Gregory Marshall wrote 3,684 Medicare Part D claims in 2024
In 2024, Gregory Marshall wrote 3,684 Medicare Part D claims for 374 patients. 98% of them were for generic drugs. CMS names the drug for 3,564 of them, across 20 drugs with 11 or more claims each, at $91,240 in total drug cost. In 2023, CMS named 4,020 claims across 21 drugs.
Gregory Marshall's Part D claims by kind of drug, 2024
- Generic3,598 claims98%
- Brand-name and other86 claims2%
Gregory Marshall'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 Gregory Marshall's Part D claims, 2024
- Opioids57%2,114 of 3,684 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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4,0202024: 3,56411%
Drugs named by CMS: 20 in 2024, 21 in 2023.
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
How Gregory Marshall takes part in Medicare
Gregory Marshall accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Gregory Marshall received $260 in industry payments from 2023 to 2025
CMS Open Payments shows 14 general payments to Gregory Marshall from 6 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. Boston Scientific Corporation paid the most, $138.
General payments to Gregory Marshall by program year, 2023 to 2025
Companies that paid Gregory Marshall the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Gregory Marshall graduated from Indiana University School of Medicine
Gregory Marshall graduated from Indiana University School of Medicine in 2017.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Gregory Marshall'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) |
| 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 Gregory Marshall
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Gregory Marshall's NPI number?
Gregory Marshall's NPI number is 1528555216. It was assigned on April 18, 2018, and it is active in the NPI Registry.
What does Gregory Marshall specialize in?
Gregory Marshall is an interventional pain medicine physician in Indianapolis, Indiana. The primary specialty in the NPI Registry is Interventional Pain Medicine Physician (taxonomy code 208VP0014X).
Where does Gregory Marshall practice?
Gregory Marshall practices at 8805 N Meridian St, Indianapolis, IN 46260. Gregory Marshall's primary practice is Center for Special Surgery - Indianapolis in Indianapolis, Indiana. Dmand AI also links Gregory Marshall to 1 ambulatory surgery center.
What is Gregory Marshall's office phone number?
The practice phone on file for Gregory Marshall is (317) 706-7246.
What is Gregory Marshall's medical license number?
Gregory Marshall holds Indiana license 71007920A.
What medical group is Gregory Marshall part of?
Gregory Marshall is linked to Center for Pain Management.
Does Gregory Marshall accept Medicare?
Yes. CMS data shows Gregory Marshall billed Medicare for 547 services in 2024, and Gregory Marshall accepts Medicare assignment.
How many Medicare patients does Gregory Marshall see?
CMS counts 117 Medicare patients who saw Gregory Marshall in 2024, with an average age of 67.
What services does Gregory Marshall bill to Medicare?
In 2024, Gregory Marshall's most billed Medicare services were office visit, established patient (99214) and office visit, established patient (99213).
Where did Gregory Marshall go to medical school?
Gregory Marshall graduated from Indiana University School of Medicine in 2017.
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What drugs does Gregory Marshall prescribe most?
In 2024 Medicare Part D data, Gregory Marshall's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Oxycodone-Acetaminophen and Gabapentin.
Has Gregory Marshall received payments from drug or device companies?
CMS Open Payments shows $260 in general payments to Gregory Marshall from 6 companies from 2023 to 2025. The largest total came from Boston Scientific Corporation.
How long has Gregory Marshall been practicing?
Gregory Marshall graduated from medical school in 2017, 9 years ago.
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