Dr. Gregory N. Nelson Jr., MD
- Medicare services, 2024
- 359
- Medicare patients, 2024
- 154
- Part D claims, 2024
- 721
- Hospital affiliations
- 5
- Industry payments
- $58,696
- Practice address
- 1050 Old Des Peres Rd STE 40, Saint Louis, MO 63131
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Des Peres Square Surgery Center - HOPD
Inpatient Rehabilitation Facility · Saint Louis, Missouri
Find Dr. Nelson's professional email, personal email and mobile number
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Dr. Gregory N. Nelson Jr. is an orthopedic surgeon in Saint Louis, Missouri
Dr. Nelson practices at Des Peres Square Surgery Center - HOPD in Saint Louis, Missouri.
Dr. Nelson's NPI, 1114174265, was assigned on August 20, 2008. Dr. Nelson graduated from Yale University School of Medicine in 2008. Dr. Nelson holds Missouri license 2017006909.
- NPI
- 1114174265NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0648406348
- NPI enumeration date
- August 20, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory N. Nelson Jr. practices at Des Peres Square Surgery Center - HOPD in Saint Louis, Missouri
Dr. Nelson's primary practice is Des Peres Square Surgery Center - HOPD, at 1050 Old Des Peres Rd STE 40, Saint Louis, MO 63131.
- Des Peres Square Surgery Center - HOPD1050 Old Des Peres Rd STE 40, Saint Louis, MO 63131
Source: Dmand AI Affiliation Data
Dr. Gregory N. Nelson Jr. is affiliated with 7 sites of care and 1 medical group
Dr. Nelson's primary practice is Des Peres Square Surgery Center - HOPD in Saint Louis, Missouri. Dr. Nelson is also affiliated with Missouri Baptist Medical Center. The medical group on file is Orthopedic Associates. Dmand AI also links Dr. Nelson to 3 more hospitals, 1 group practice or clinic and 1 ambulatory surgery center, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory N. Nelson Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nelson practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Des Peres Square Surgery Center - HOPD | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory N. Nelson Jr. is one of 417 orthopedic surgeons in Missouri
Orthopaedic surgery is Dr. Nelson's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dmand AI has Dr. Nelson's licenses on file in 4 states: Missouri, Arizona, New Jersey and Pennsylvania.
Specialties and state licenses
- Orthopaedic surgery, MissouriPrimary
- Specialist, Arizona
- New Jersey license
- Pennsylvania license
Orthopedic surgeons near Dr. Nelson
Counts of orthopedic surgeons 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 N. Nelson Jr. billed Medicare for 359 services in 2024
CMS data shows 359 Medicare services from Dr. Nelson across 10 procedure codes in 2024, for 154 Medicare patients. Medicare paid $12,347 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Nelson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2062024: 15425%
- Imaging
- 2023: 1242024: 11210%
- Surgery
- 2023: 1002024: 937%
Dr. Nelson compared with the Missouri median for orthopedic surgeons, 2024
- Dr. Nelson
- Missouri median
- Medicare services
- 359vs 84958% below
- Medicare patients
- 154vs 23133% below
- Part D claims
- 622vs 1564.0 times
Medians across 414 orthopedic surgeons in Missouri with Dmand AI profiles that report each measure.
Dr. Nelson'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 Dr. Nelson and other orthopedic surgeons in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory N. Nelson Jr. treated 154 Medicare patients in 2024, average age 72
CMS counts 154 Medicare patients who saw Dr. Nelson in 2024. The largest group is 65 to 74, with 64 patients. 75% of them have arthritis, and 75% have high blood pressure. 21% are also on Medicaid. Their average risk score is 1.40, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Nelson's median patient age at 68, with 57% women.
Dr. Nelson's Medicare patients by age, 2024
Dr. Nelson's Medicare patients by sex, 2024
- Women10367%
- Men5133%
Chronic conditions among Dr. Nelson's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol71%
- Diabetes32%
- Anxiety30%
- Mood disorders30%
- Depression29%
- Chronic kidney disease28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nelson'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
- Women57%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory N. Nelson Jr. wrote 721 Medicare Part D claims in 2024
In 2024, Dr. Nelson wrote 721 Medicare Part D claims for 254 patients. 99% of them were for generic drugs. CMS names the drug for 622 of them, across 11 drugs with 11 or more claims each, at $7,025 in total drug cost. In 2023, CMS named 734 claims across 14 drugs.
Dr. Nelson's Part D claims by kind of drug, 2024
- Generic713 claims99%
- Brand-name and other8 claims1%
Dr. Nelson'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 Dr. Nelson's Part D claims, 2024
- Opioids49%353 of 721 claims
- Antibiotics9%63 of 721 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: 7342024: 62215%
Drugs named by CMS: 11 in 2024, 14 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
Dr. Gregory N. Nelson Jr. ranks in the 87th percentile for upper limb (arm) arthroscopy (minimally invasive joint repair) in Medicare
Dr. Nelson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 53 procedures of upper limb (arm) arthroscopy (minimally invasive joint repair) by Dr. Nelson, more than 87% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Nelson ranks in Medicare procedure volume
- Upper limb (arm) arthroscopy (minimally invasive joint repair)
- 87th percentile53 procedures
- Knee replacement
- 39th percentile12 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Lower limb (leg) arthroscopy (minimally invasive joint repair): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Gregory N. Nelson Jr. received $58,696 in industry payments from 2016 to 2025
CMS Open Payments shows 177 general payments to Dr. Nelson from 19 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 70% of the total. Zimmer Biomet Holdings, Inc. paid the most, $41,140.
General payments to Dr. Nelson by program year, 2016 to 2025
General payments to Dr. Nelson by kind, 2016 to 2025
- Consulting fees$40,94170%
- Travel and lodging$10,50018%
- Food and beverage$4,6888%
- Education$2,5664%
Companies that paid Dr. Nelson the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory N. Nelson Jr. graduated from Yale University School of Medicine
Dr. Nelson graduated from Yale University School of Medicine in 2008.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory N. Nelson Jr.'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)Doctors and Clinicians Utilization Data (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 N. Nelson Jr.
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 N. Nelson Jr.'s NPI number?
Dr. Gregory N. Nelson Jr.'s NPI number is 1114174265. It was assigned on August 20, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory N. Nelson Jr.?
Dr. Gregory N. Nelson Jr. is an orthopedic surgeon in Saint Louis, Missouri. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Gregory N. Nelson Jr. practice?
Dr. Nelson practices at 1050 Old Des Peres Rd STE 40, Saint Louis, MO 63131. Dr. Nelson's primary practice is Des Peres Square Surgery Center - HOPD in Saint Louis, Missouri. Dmand AI also links Dr. Nelson to 3 hospitals, 1 group practice or clinic and 1 ambulatory surgery center.
What is Dr. Gregory N. Nelson Jr.'s medical license number?
Dr. Nelson holds Missouri license 2017006909, one of the licenses on file in 4 states.
Which states has Dr. Gregory N. Nelson Jr. been licensed in?
Dmand AI has state licenses on file for Dr. Nelson in Missouri, Arizona, New Jersey and Pennsylvania.
Which hospitals is Dr. Gregory N. Nelson Jr. affiliated with?
Dr. Nelson is affiliated with Missouri Baptist Medical Center. Dmand AI links Dr. Nelson to 4 more hospitals.
What medical group is Dr. Gregory N. Nelson Jr. part of?
Dr. Nelson is linked to Orthopedic Associates.
Does Dr. Gregory N. Nelson Jr. accept Medicare?
Yes. CMS data shows Dr. Nelson billed Medicare for 359 services in 2024, and Dr. Nelson accepts Medicare assignment.
How many Medicare patients does Dr. Gregory N. Nelson Jr. see?
CMS counts 154 Medicare patients who saw Dr. Nelson in 2024, with an average age of 72.
What services does Dr. Gregory N. Nelson Jr. bill to Medicare?
In 2024, Dr. Nelson's most billed Medicare services were surgery: bones and joints (20610), office visit, established patient (99213) and diagnostic imaging (73030).
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Where did Dr. Gregory N. Nelson Jr. go to medical school?
Dr. Nelson graduated from Yale University School of Medicine in 2008.
What drugs does Dr. Gregory N. Nelson Jr. prescribe most?
In 2024 Medicare Part D data, Dr. Nelson's most prescribed drugs by claims were Oxycodone HCl, Celecoxib and Hydrocodone-Acetaminophen.
Has Dr. Gregory N. Nelson Jr. received payments from drug or device companies?
CMS Open Payments shows $58,696 in general payments to Dr. Nelson from 19 companies from 2016 to 2025. The largest total came from Zimmer Biomet Holdings, Inc.
How long has Dr. Gregory N. Nelson Jr. been practicing?
Dr. Nelson graduated from medical school in 2008, 18 years ago.
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