Dr. Gregory Joseph Simmons, MD
- Medicare services, 2024
- 8,122
- Medicare patients, 2024
- 326
- Part D claims, 2024
- 1,719
- Hospital affiliations
- 3
- Industry payments
- $1,844
- Practice address
- 670 Mason Ridge Center Drive, Ste 300, Saint Louis, MO 63141
- Practice phone
- Call (314) 362-0200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
BJC Home Care
Home Health Agency - Main Office · Saint Louis, Missouri
Find Dr. Simmons' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gregory Joseph Simmons is an orthopedic surgeon in Saint Louis, Missouri
Dr. Simmons practices at BJC Home Care in Saint Louis, Missouri.
Dr. Simmons' NPI, 1194729871, was assigned on June 9, 2005. Dr. Simmons graduated from Saint Louis University School of Medicine in 1995. Dr. Simmons holds Illinois license 036102208.
- NPI
- 1194729871NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9830092865
- NPI enumeration date
- June 9, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 362-0200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory Joseph Simmons practices at BJC Home Care in Saint Louis, Missouri
Dr. Simmons' primary practice is BJC Home Care, at 670 Mason Ridge Center Drive, Ste 300, Saint Louis, MO 63141. The practice phone is (314) 362-0200.
- BJC Home Care670 Mason Ridge Center Drive, Ste 300, Saint Louis, MO 63141Phone(314) 362-0200
Source: Dmand AI Affiliation Data
Dr. Gregory Joseph Simmons is affiliated with 9 sites of care and 2 medical groups
Dr. Simmons' primary practice is BJC Home Care in Saint Louis, Missouri. Dr. Simmons is also affiliated with Memorial Hospital in Belleville. The medical group on file is BJC Medical Group. Dmand AI also links Dr. Simmons to 2 more hospitals, 2 group practices and clinics, 2 home health agencies, 1 hospice and 1 medical group, each named with a free account. Dr. Simmons' employer is on file too: a home health agency.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory Joseph Simmons' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Simmons practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| BJC Home Care | Available with a free account |
| +8 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory Joseph Simmons is one of 417 orthopedic surgeons in Missouri
Orthopaedic surgery is Dr. Simmons' primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Simmons is licensed in Illinois.
Specialties and state licenses
- Orthopaedic surgery, IllinoisPrimary
Orthopedic surgeons near Dr. Simmons
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 Joseph Simmons billed Medicare for 8,122 services in 2024
CMS data shows 8,122 Medicare services from Dr. Simmons across 12 procedure codes in 2024, for 326 Medicare patients. Medicare paid $116,454 for them.
Dr. Simmons' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 6,7252024: 6,725No change
- Surgery
- 2023: 9462024: 1,07714%
- Office and hospital visits
- 2023: 3832024: 32016%
Where Dr. Simmons' Medicare services took place, 2024
- In an office8,06199%
- In a facility611%
Dr. Simmons compared with the Missouri median for orthopedic surgeons, 2024
- Dr. Simmons
- Missouri median
- Medicare services
- 8,122vs 8499.6 times
- Medicare patients
- 326vs 23141% above
- Part D claims
- 1,617vs 15610.4 times
Medians across 414 orthopedic surgeons in Missouri with Dmand AI profiles that report each measure.
Dr. Simmons' 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. Simmons 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 Joseph Simmons treated 326 Medicare patients in 2024, average age 74
CMS counts 326 Medicare patients who saw Dr. Simmons in 2024. The largest group is 65 to 74, with 148 patients. 75% of them have arthritis, and 75% have high blood pressure. 15% are also on Medicaid. Their average risk score is 1.31, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Simmons' median patient age at 71, with 67% women.
Dr. Simmons' Medicare patients by age, 2024
Dr. Simmons' Medicare patients by sex, 2024
- Women20663%
- Men12037%
Chronic conditions among Dr. Simmons' Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease37%
- Anxiety33%
- Diabetes32%
- Chronic kidney disease31%
- Mood disorders29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Simmons' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women67%
- Men32%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory Joseph Simmons wrote 1,719 Medicare Part D claims in 2024
In 2024, Dr. Simmons wrote 1,719 Medicare Part D claims for 217 patients. 98% of them were for generic drugs. CMS names the drug for 1,617 of them, across 19 drugs with 11 or more claims each, at $40,741 in total drug cost. In 2023, CMS named 1,448 claims across 20 drugs.
Dr. Simmons' Part D claims by kind of drug, 2024
- Generic1,684 claims98%
- Brand-name35 claims2%
Dr. Simmons' 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. Simmons' Part D claims, 2024
- Opioids74%1,276 of 1,719 claims
- Antibiotics8%135 of 1,719 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: 1,4482024: 1,61712%
Drugs named by CMS: 19 in 2024, 20 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 Joseph Simmons ranks in the 81st percentile for lower limb (leg) arthroscopy (minimally invasive joint repair) in Medicare
Dr. Simmons accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 11 procedures of lower limb (leg) arthroscopy (minimally invasive joint repair) by Dr. Simmons, more than 81% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Simmons ranks in Medicare procedure volume
- Knee replacement
- 51st percentile19 procedures
- Lower limb (leg) arthroscopy (minimally invasive joint repair)
- 81st percentile11 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Hip replacement: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 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 Joseph Simmons received $1,844 in industry payments from 2016 to 2025
CMS Open Payments shows 63 general payments to Dr. Simmons from 21 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Zimmer Biomet Holdings, Inc. paid the most, $532.
General payments to Dr. Simmons by program year, 2016 to 2025
Companies that paid Dr. Simmons 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 Joseph Simmons graduated from Saint Louis University School of Medicine
Dr. Simmons graduated from Saint Louis University School of Medicine in 1995.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory Joseph Simmons'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)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 Joseph Simmons
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 Joseph Simmons' NPI number?
Dr. Gregory Joseph Simmons' NPI number is 1194729871. It was assigned on June 9, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Joseph Simmons?
Dr. Gregory Joseph Simmons 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 Joseph Simmons practice?
Dr. Simmons practices at 670 Mason Ridge Center Drive, Ste 300, Saint Louis, MO 63141. Dr. Simmons' primary practice is BJC Home Care in Saint Louis, Missouri. Dmand AI also links Dr. Simmons to 2 hospitals, 2 group practices and clinics, 2 home health agencies, 1 hospice and 1 medical group.
What is Dr. Gregory Joseph Simmons' office phone number?
The practice phone on file for Dr. Simmons is (314) 362-0200.
What is Dr. Gregory Joseph Simmons' medical license number?
Dr. Simmons holds Illinois license 036102208.
Which hospitals is Dr. Gregory Joseph Simmons affiliated with?
Dr. Simmons is affiliated with Memorial Hospital in Belleville. Dmand AI links Dr. Simmons to 2 more hospitals.
What medical group is Dr. Gregory Joseph Simmons part of?
Dr. Simmons is linked to BJC Medical Group. Dmand AI links Dr. Simmons to 1 more medical group.
Does Dr. Gregory Joseph Simmons accept Medicare?
Yes. CMS data shows Dr. Simmons billed Medicare for 8,122 services in 2024, and Dr. Simmons accepts Medicare assignment.
How many Medicare patients does Dr. Gregory Joseph Simmons see?
CMS counts 326 Medicare patients who saw Dr. Simmons in 2024, with an average age of 74.
What services does Dr. Gregory Joseph Simmons bill to Medicare?
In 2024, Dr. Simmons' most billed Medicare services were injected or infused drug (J3301), injected or infused drug (J7318) and surgery: bones and joints (20610).
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Where did Dr. Gregory Joseph Simmons go to medical school?
Dr. Simmons graduated from Saint Louis University School of Medicine in 1995.
What drugs does Dr. Gregory Joseph Simmons prescribe most?
In 2024 Medicare Part D data, Dr. Simmons' most prescribed drugs by claims were Hydrocodone-Acetaminophen, Oxycodone-Acetaminophen and Tramadol HCl.
Has Dr. Gregory Joseph Simmons received payments from drug or device companies?
CMS Open Payments shows $1,844 in general payments to Dr. Simmons from 21 companies from 2016 to 2025. The largest total came from Zimmer Biomet Holdings, Inc.
How long has Dr. Gregory Joseph Simmons been practicing?
Dr. Simmons graduated from medical school in 1995, 31 years ago.
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