Dr. Stephen A. Wertheimer, MD
- Part D claims, 2020
- 13
- Publications
- 1
- Industry payments
- $488
- Affiliated sites
- 2
- Medical groups
- 2
- Practice address
- 4290 Katella Ave, Los Alamitos, CA 90720
- Practice phone
- Call (562) 248-0401
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Tomoji Mizuguchi
Surgical practice · Los Alamitos, California
Find Dr. Wertheimer'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. Stephen A. Wertheimer is an orthopedic surgeon in Los Alamitos, California
Dr. Wertheimer practices at Tomoji Mizuguchi in Los Alamitos, California.
Dr. Wertheimer's NPI, 1952747701, was assigned on May 21, 2013. Dr. Wertheimer graduated from Albert Einstein College of Medicine in 1963. Dr. Wertheimer holds California license G10289.
- NPI
- 1952747701NPI Registry (opens in a new tab)
- NPI enumeration date
- May 21, 2013
- NPI status
- Active
- Practice phone
- (562) 248-0401
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Medical school graduation
- 1963
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen A. Wertheimer practices at Tomoji Mizuguchi in Los Alamitos, California
Dr. Wertheimer's primary practice is Tomoji Mizuguchi, at 4290 Katella Ave, Los Alamitos, CA 90720. The practice phone is (562) 248-0401.
- Tomoji Mizuguchi4290 Katella Ave, Los Alamitos, CA 90720Phone(562) 248-0401
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen A. Wertheimer is affiliated with 2 sites of care and 2 medical groups
Dr. Wertheimer's primary practice is Tomoji Mizuguchi in Los Alamitos, California. Dmand AI also links Dr. Wertheimer to 2 medical groups and 1 group practice or clinic, each 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. Stephen A. Wertheimer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Wertheimer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Tomoji Mizuguchi | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen A. Wertheimer is one of 2,056 orthopedic surgeons in California
Orthopaedic surgery is Dr. Wertheimer's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Wertheimer is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery. Dmand AI has Dr. Wertheimer's licenses on file in 3 states: California, Colorado and Pennsylvania.
Specialties and state licenses
- Orthopaedic surgery, CaliforniaPrimary
- Colorado license
- Pennsylvania license
Orthopedic surgeons near Dr. Wertheimer
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. Stephen A. Wertheimer wrote 13 Medicare Part D claims in 2020
In 2020, Dr. Wertheimer wrote 13 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $152 in total drug cost. In 2019, CMS named 11 claims across 1 drug.
Dr. Wertheimer's most prescribed drugs by claims, 2020
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, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 112020: 1318%
Drugs named by CMS: 1 in 2020, 1 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Stephen A. Wertheimer has 1 publication on record
Dmand AI links 1 paper to Dr. Wertheimer.
Recent publications by Dr. Wertheimer
See who Dr. Wertheimer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Wertheimer works with, so you can find a warm path to the right orthopedic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Stephen A. Wertheimer received $488 in industry payments from 2018 to 2025
CMS Open Payments shows 7 general payments to Dr. Wertheimer from 3 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 100% of the total. Boston Scientific Corporation paid the most, $343.
General payments to Dr. Wertheimer by program year, 2018 to 2025
Companies that paid Dr. Wertheimer the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stephen A. Wertheimer has 1 award and honors on record
Dmand AI lists 1 award for Dr. Wertheimer, most recently Award for Science and Medicine in 2009. Dr. Wertheimer serves on Multiple.
Awards and honors for Dr. Wertheimer
- 2009
- Award for Science and Medicine
Dr. Wertheimer's committees and leadership roles
- Orthopedic Dept.Chairman - Miller Childrens' Hospital of Memorial Medical Center (Long Beach)
- 1976 to 1980
Source: Dmand AI Professional Profile Data
Dr. Stephen A. Wertheimer graduated from Albert Einstein College of Medicine
Dr. Wertheimer graduated from Albert Einstein College of Medicine in 1963.
- Medical school
- Board certified in orthopaedic surgery
Source: Dmand AI Professional Profile Data
Sources for Dr. Stephen A. Wertheimer'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) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Stephen A. Wertheimer
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. Stephen A. Wertheimer's NPI number?
Dr. Stephen A. Wertheimer's NPI number is 1952747701. It was assigned on May 21, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen A. Wertheimer?
Dr. Stephen A. Wertheimer is an orthopedic surgeon in Los Alamitos, California. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Stephen A. Wertheimer practice?
Dr. Wertheimer practices at 4290 Katella Ave, Los Alamitos, CA 90720. Dr. Wertheimer's primary practice is Tomoji Mizuguchi in Los Alamitos, California. Dmand AI also links Dr. Wertheimer to 2 medical groups and 1 group practice or clinic.
What is Dr. Stephen A. Wertheimer's office phone number?
The practice phone on file for Dr. Wertheimer is (562) 248-0401.
What is Dr. Stephen A. Wertheimer's medical license number?
Dr. Wertheimer holds California license G10289, one of the licenses on file in 3 states.
Which states has Dr. Stephen A. Wertheimer been licensed in?
Dmand AI has state licenses on file for Dr. Wertheimer in California (1964 to 2026), Colorado (1974 to 2013) and Pennsylvania (1965 to 1972).
Is Dr. Stephen A. Wertheimer board certified?
Yes. Dr. Wertheimer is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery.
Where did Dr. Stephen A. Wertheimer go to medical school?
Dr. Wertheimer graduated from Albert Einstein College of Medicine in 1963.
What drugs does Dr. Stephen A. Wertheimer prescribe most?
In 2020 Medicare Part D data, Dr. Wertheimer's most prescribed drugs by claims were Warfarin Sodium.
Has Dr. Stephen A. Wertheimer received payments from drug or device companies?
CMS Open Payments shows $488 in general payments to Dr. Wertheimer from 3 companies from 2018 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. Stephen A. Wertheimer been practicing?
Dr. Wertheimer graduated from medical school in 1963, 63 years ago.
Does Dr. Stephen A. Wertheimer do research?
Dmand AI links 1 publication to Dr. Wertheimer.
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