Dr. John Oneil Simmonds, MD

  • Alhambra, CA
  • Orthopedic surgeon
NPI1801195912PAC ID1254593130
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
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Personal email
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Mobile number
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Social profiles

Primary practice

Wound MD

Alhambra, California

See all 5 affiliations

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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 and contact details
Medicare PAC ID
1254593130
NPI enumeration date
March 15, 2011
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(323) 800-2799
Professional email
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Personal email
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Mobile number
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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 MD
    415 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.

See all 5 affiliations for Dr. Simmonds

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.

EHR by site
SiteEHR vendor and product
Wound MDAvailable with a free account
+2 more sites and 1 medical groupAvailable 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, CaliforniaPrimaryLicense A100364 · 2007 to 2027 · taxonomy 207X00000X
  • Louisiana license2021 to 2022
  • North Carolina license2021 to 2022

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.

2,056orthopedic surgeons in California
5orthopedic surgeons in Alhambra

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.

Medicare services, 202413,963
Medicare patients784
Paid by Medicare$981,119
Procedure codes9

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.

See all procedures by Dr. Simmonds

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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.

Medicare patients, 2024784
Average age76
Average risk score3.65
Also on Medicaid90%

Dr. Simmonds' Medicare patients by age, 2024

Dr. Simmonds' Medicare patients by sex, 2024

  • Women38849%
  • Men39651%

Chronic conditions among Dr. Simmonds' Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Mood disorders68%
  4. Diabetes67%
  5. Depression61%
  6. Arthritis58%
  7. Chronic kidney disease57%
  8. 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.

Part D claims, 202448
Drugs named by CMS1
Total drug cost$14,014
Part D patients23

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.

See all prescribing by Dr. Simmonds

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

$1Kin total
  • 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.

See all payments to Dr. Simmonds

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.

  1. Medical schoolHoward University College of Medicine

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

  1. HMO2
  2. Medicare2
  3. POS2
  4. PPO2
  5. EPO1

Source: Dmand AI Insurance Network Data

Sources for Dr. John Oneil Simmonds's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors 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 paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand 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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