Dr. John Steven Portwood, MD
- Medicare services, 2021
- 318
- Part D claims, 2021
- 51
- Industry payments
- $654
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 3838 Sherman Dr, Riverside, CA 92503-4001
- Practice phone
- Call (951) 354-7270
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Southern California Orthopaedic Specialists Medical Group
Multi-specialty group site · Riverside, California
Find Dr. Portwood's 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 Steven Portwood is an orthopedic surgeon in Riverside, California
Dr. Portwood practices at Southern California Orthopaedic Specialists Medical Group in Riverside, California.
Dr. Portwood's NPI, 1255393492, was assigned on April 4, 2006. Dr. Portwood graduated from OHSU School of Medicine in 1982. Dr. Portwood's California license number on file is G51596.
- NPI
- 1255393492NPI Registry (opens in a new tab)
- NPI enumeration date
- April 4, 2006
- NPI status
- Active
- Practice phone
- (951) 354-7270
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Steven Portwood practices at Southern California Orthopaedic Specialists Medical Group in Riverside, California
Dr. Portwood's primary practice is Southern California Orthopaedic Specialists Medical Group, at 3838 Sherman Dr, Riverside, CA 92503-4001. The practice phone is (951) 354-7270.
- Southern California Orthopaedic Specialists Medical Group3838 Sherman Dr, Riverside, CA 92503-4001Phone(951) 354-7270
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Steven Portwood is affiliated with 1 site of care and 1 medical group
Dr. Portwood's primary practice is Southern California Orthopaedic Specialists Medical Group in Riverside, California. Dmand AI also links Dr. Portwood to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. John Steven Portwood's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Portwood practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Southern California Orthopaedic Specialists Medical Group | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Steven Portwood is one of 2,056 orthopedic surgeons in California
Orthopaedic surgery is Dr. Portwood's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Portwood has a license on file in California.
Specialties and state licenses
- Orthopaedic surgery, CaliforniaPrimary
Orthopedic surgeons near Dr. Portwood
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 Steven Portwood billed Medicare for 318 services in 2021
CMS data shows 318 Medicare services from Dr. Portwood across 4 procedure codes in 2021. Medicare paid $5,667 for them. Every service was in an office.
Dr. Portwood's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Drugs given in the office
- 2020: 5722021: 20963%
- Office and hospital visits
- 2020: 2982021: 6379%
- Surgery
- 2020: 1182021: 4661%
- Imaging
- 2020: 432021: 0100%
Dr. Portwood compared with the California median for orthopedic surgeons, 2021
- Dr. Portwood
- California median
- Medicare services
- 318vs 68353% below
- Part D claims
- 51vs 7027% below
Medians across 1,844 orthopedic surgeons in California with Dmand AI profiles that report each measure.
Dr. Portwood's most billed Medicare procedure codes, 2021
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. Portwood 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 Steven Portwood's patients have a median age of 69
Across all payers, Dmand AI patient panel data puts Dr. Portwood's median patient age at 69, with 68% women.
Dr. Portwood's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women68%
- Men33%
Source: Dmand AI Patient Panel Data
Dr. John Steven Portwood wrote 51 Medicare Part D claims in 2021
In 2021, Dr. Portwood wrote 51 Medicare Part D claims. They cover 3 drugs, with $661 in total drug cost. In 2020, CMS named 221 claims across 5 drugs.
Dr. Portwood's most prescribed drugs by claims, 2021
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, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 2212021: 5177%
Drugs named by CMS: 3 in 2021, 5 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. John Steven Portwood received $654 in industry payments from 2016 to 2020
CMS Open Payments shows 31 general payments to Dr. Portwood from 10 drug and device companies from 2016 to 2020. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $209.
General payments to Dr. Portwood by program year, 2016 to 2020
Companies that paid Dr. Portwood the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Steven Portwood graduated from OHSU School of Medicine
Dr. Portwood graduated from OHSU School of Medicine in 1982.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. John Steven Portwood accepts plans from 6 insurance carriers
Dr. Portwood is in network with 6 carriers, including Blue Cross Blue Shield of Massachusetts, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- Elevance
- HCSC
- Molina
- Regence Health Plans
Plan types Dr. Portwood accepts, by number of carriers
- Medicare6
- PPO5
- HMO1
Source: Dmand AI Insurance Network Data
Sources for Dr. John Steven Portwood'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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 Steven Portwood
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 Steven Portwood's NPI number?
Dr. John Steven Portwood's NPI number is 1255393492. It was assigned on April 4, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Steven Portwood?
Dr. John Steven Portwood is an orthopedic surgeon in Riverside, California. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. John Steven Portwood practice?
Dr. Portwood practices at 3838 Sherman Dr, Riverside, CA 92503-4001. Dr. Portwood's primary practice is Southern California Orthopaedic Specialists Medical Group in Riverside, California. Dmand AI also links Dr. Portwood to 1 medical group.
What is Dr. John Steven Portwood's office phone number?
The practice phone on file for Dr. Portwood is (951) 354-7270.
What is Dr. John Steven Portwood's medical license number?
Dr. Portwood's California license number on file is G51596.
Does Dr. John Steven Portwood accept Medicare?
Yes. CMS data shows Dr. Portwood billed Medicare for 318 services in 2021.
What services does Dr. John Steven Portwood bill to Medicare?
In 2021, Dr. Portwood's most billed Medicare services were injected or infused drug (J3301), surgery: bones and joints (20610) and office visit, established patient (99214).
Where did Dr. John Steven Portwood go to medical school?
Dr. Portwood graduated from OHSU School of Medicine in 1982.
What drugs does Dr. John Steven Portwood prescribe most?
In 2021 Medicare Part D data, Dr. Portwood's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Tramadol HCl and Ibuprofen.
Has Dr. John Steven Portwood received payments from drug or device companies?
CMS Open Payments shows $654 in general payments to Dr. Portwood from 10 companies from 2016 to 2020. The largest total came from Stryker Corporation.
How long has Dr. John Steven Portwood been practicing?
Dr. Portwood graduated from medical school in 1982, 44 years ago.
What insurance does Dr. John Steven Portwood accept?
Dr. Portwood is in network with 6 carriers, including Blue Cross Blue Shield of Massachusetts, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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