Dr. John Oneil Simmonds, MD
- Medicare services, 2024
- 13,963
- Medicare patients, 2024
- 784
- Part D claims, 2024
- 48
- MIPS score, 2024
- 75
- Industry payments
- $1,024
- Practice address
- 415 S Garfield Ave, Alhambra, CA 91801
- Practice phone
- Call (323) 800-2799
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Wound MD
Alhambra, California
Find Dr. Simmonds' 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. John Oneil Simmonds is an orthopedic surgeon in Alhambra, California
Dr. Simmonds practices at Wound MD in Alhambra, California.
Dr. Simmonds' NPI, 1801195912, was assigned on March 15, 2011. Dr. Simmonds graduated from Howard University College of Medicine in 2001. Dr. Simmonds holds California license A100364.
- NPI
- 1801195912NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254593130
- NPI enumeration date
- March 15, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (323) 800-2799
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Oneil Simmonds practices at Wound MD in Alhambra, California
Dr. Simmonds' primary practice is Wound MD, at 415 S Garfield Ave, Alhambra, CA 91801 in Los Angeles County. The practice phone is (323) 800-2799.
- Wound MD415 S Garfield Ave, Alhambra, CA 91801 · Los Angeles CountyPhone(323) 800-2799
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John Oneil Simmonds is affiliated with 3 sites of care and 2 medical groups
Dr. Simmonds' primary practice is Wound MD in Alhambra, California. The medical group on file is Wound MD PC. Dmand AI also links Dr. Simmonds to 1 more group practice or clinic, 1 skilled nursing facility and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John Oneil Simmonds' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Simmonds practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Wound MD | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Oneil Simmonds is one of 2,056 orthopedic surgeons in California
Orthopaedic surgery is Dr. Simmonds' primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dmand AI has Dr. Simmonds' licenses on file in 3 states: California, Louisiana and North Carolina.
Specialties and state licenses
- Orthopaedic surgery, CaliforniaPrimary
- Louisiana license
- North Carolina license
Clinical focus
Dmand AI lists arthritis, lower back pain, muscle pain, fibromyalgia, and limb pain, neck pain and spine problems and thoracic spine disorders among the conditions Dr. Simmonds treats.
Orthopedic surgeons near Dr. Simmonds
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. John Oneil Simmonds billed Medicare for 13,963 services in 2024
CMS data shows 13,963 Medicare services from Dr. Simmonds across 9 procedure codes in 2024, for 784 Medicare patients. Medicare paid $981,119 for them.
Dr. Simmonds' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 4,3652024: 7,18465%
- Office and hospital visits
- 2023: 5,6352024: 6,77920%
- Imaging
- 2023: 1002024: 0100%
Where Dr. Simmonds' Medicare services took place, 2024
- In an office5,63940%
- In a facility8,32460%
Dr. Simmonds compared with the California median for orthopedic surgeons, 2024
- Dr. Simmonds
- California median
- Medicare services
- 13,963vs 68320.4 times
- Medicare patients
- 784vs 2153.6 times
- Part D claims
- 14vs 7080% below
Medians across 1,844 orthopedic surgeons in California with Dmand AI profiles that report each measure.
Dr. Simmonds' 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. Simmonds and other orthopedic surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Oneil Simmonds treated 784 Medicare patients in 2024, average age 76
CMS counts 784 Medicare patients who saw Dr. Simmonds in 2024. The largest group is 65 to 74, with 245 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 90% are also on Medicaid. Their average risk score is 3.65, 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. Simmonds' median patient age at 73, with 47% women.
Dr. Simmonds' Medicare patients by age, 2024
Dr. Simmonds' Medicare patients by sex, 2024
- Women38849%
- Men39651%
Chronic conditions among Dr. Simmonds' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Mood disorders68%
- Diabetes67%
- Depression61%
- Arthritis58%
- Chronic kidney disease57%
- Alzheimer's and dementia56%
Share of Medicare patients with each condition. A patient can have several.
Dr. Simmonds' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women47%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Oneil Simmonds wrote 48 Medicare Part D claims in 2024
In 2024, Dr. Simmonds wrote 48 Medicare Part D claims for 23 patients. 56% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $14,014 in total drug cost. In 2023, CMS named 13 claims across 1 drug.
Dr. Simmonds' Part D claims by kind of drug, 2024
- Generic27 claims56%
- Brand-name21 claims44%
Dr. Simmonds' 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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 132024: 148%
Drugs named by CMS: 1 in 2024, 1 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. John Oneil Simmonds scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Simmonds for performance year 2024, reported as part of a group. Dr. Simmonds accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 3,262 procedures of removal of tissue by Dr. Simmonds, more than 99% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- MIPS final score, 2024
- 75 of 100
Where Dr. Simmonds ranks in Medicare procedure volume
- Removal of tissue
- 99th percentile3,262 procedures
- Removal of skin lesions
- 78th percentile173 procedures
- Removal or shaving of skin growth
- 78th percentile45 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Skin biopsy: 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 Oneil Simmonds received $1,024 in industry payments from 2016 to 2023
CMS Open Payments shows 12 general payments to Dr. Simmonds from 4 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 95% of the total. Merz North America, Inc. paid the most, $789.
General payments to Dr. Simmonds by program year, 2016 to 2023
General payments to Dr. Simmonds by kind, 2016 to 2023
- Food and beverage$97495%
- Education$505%
Companies that paid Dr. Simmonds the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Oneil Simmonds graduated from Howard University College of Medicine
Dr. Simmonds graduated from Howard University College of Medicine in 2001.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. John Oneil Simmonds accepts plans from 3 insurance carriers
Dr. Simmonds is in network with 3 carriers, including Aetna, Blue Cross Blue Shield of Michigan and CMS Medicare. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- CMS Medicare
Plan types Dr. Simmonds accepts, by number of carriers
- HMO2
- Medicare2
- POS2
- PPO2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. John Oneil Simmonds'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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)Clinician Public Reporting: Overall MIPS Performance (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 |
| 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. John Oneil Simmonds
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 Oneil Simmonds' NPI number?
Dr. John Oneil Simmonds' NPI number is 1801195912. It was assigned on March 15, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. John Oneil Simmonds?
Dr. John Oneil Simmonds is an orthopedic surgeon in Alhambra, California. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. John Oneil Simmonds practice?
Dr. Simmonds practices at 415 S Garfield Ave, Alhambra, CA 91801. Dr. Simmonds' primary practice is Wound MD in Alhambra, California. Dmand AI also links Dr. Simmonds to 1 group practice or clinic, 1 skilled nursing facility and 1 medical group.
What is Dr. John Oneil Simmonds' office phone number?
The practice phone on file for Dr. Simmonds is (323) 800-2799.
What is Dr. John Oneil Simmonds' medical license number?
Dr. Simmonds holds California license A100364, one of the licenses on file in 3 states.
Which states has Dr. John Oneil Simmonds been licensed in?
Dmand AI has state licenses on file for Dr. Simmonds in California (2007 to 2027), Louisiana (2021 to 2022) and North Carolina (2021 to 2022).
What medical group is Dr. John Oneil Simmonds part of?
Dr. Simmonds is linked to Wound MD PC. Dmand AI links Dr. Simmonds to 1 more medical group.
Does Dr. John Oneil Simmonds accept Medicare?
Yes. CMS data shows Dr. Simmonds billed Medicare for 13,963 services in 2024, and Dr. Simmonds accepts Medicare assignment.
What is Dr. John Oneil Simmonds' MIPS score?
Dr. Simmonds' MIPS final score for performance year 2024 is 75 out of 100, reported as part of a group.
How many Medicare patients does Dr. John Oneil Simmonds see?
CMS counts 784 Medicare patients who saw Dr. Simmonds in 2024, with an average age of 76.
Show 6 more questionsShow fewer questions
What services does Dr. John Oneil Simmonds bill to Medicare?
In 2024, Dr. Simmonds' most billed Medicare services were nursing facility care (99308), surgery: skin and soft tissue (11045) and surgery: skin and soft tissue (11046).
Where did Dr. John Oneil Simmonds go to medical school?
Dr. Simmonds graduated from Howard University College of Medicine in 2001.
What drugs does Dr. John Oneil Simmonds prescribe most?
In 2024 Medicare Part D data, Dr. Simmonds' most prescribed drugs by claims were Santyl.
Has Dr. John Oneil Simmonds received payments from drug or device companies?
CMS Open Payments shows $1,024 in general payments to Dr. Simmonds from 4 companies from 2016 to 2023. The largest total came from Merz North America, Inc.
How long has Dr. John Oneil Simmonds been practicing?
Dr. Simmonds graduated from medical school in 2001, 25 years ago.
What insurance does Dr. John Oneil Simmonds accept?
Dr. Simmonds is in network with 3 carriers, including Aetna, Blue Cross Blue Shield of Michigan and CMS Medicare. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
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