Environ Health Perspect
ArchaeologyCaliforniaCephalometry
Dr. Thor C. Gjerdrum, MD
NPI1407830177
- Medicare services, 2020
- 201
- Part D claims, 2020
- 12
- Publications
- 3
- Industry payments
- $88
- Insurance carriers
- 2
- Practice address
- 300 South Stratford Avenue, Santa Maria, CA 93454-5903
- Practice phone
- Call (805) 739-3863
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Gjerdrum's professional email, personal email and mobile number
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Dr. Thor C. Gjerdrum is an orthopedic surgeon in Santa Maria, California
Dr. Gjerdrum practices in Santa Maria, California.
Dr. Gjerdrum's NPI, 1407830177, was assigned on December 5, 2005. Dr. Gjerdrum graduated from Creighton University School of Medicine - Omaha in 1966. Dr. Gjerdrum holds California license G16055.
NPI and contact details
- NPI
- 1407830177NPI Registry (opens in a new tab)
- NPI enumeration date
- December 5, 2005
- NPI status
- Active
- Practice phone
- (805) 739-3863
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1966
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Thor C. Gjerdrum's practice address is in Santa Maria, California
Dr. Gjerdrum's practice address in the NPI Registry is 300 South Stratford Avenue, Santa Maria, CA 93454-5903. The practice phone is (805) 739-3863.
- NPI Registry address300 South Stratford Avenue, Santa Maria, CA 93454-5903Phone(805) 739-3863
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Thor C. Gjerdrum's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gjerdrum practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Gjerdrum's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thor C. Gjerdrum is one of 2,056 orthopedic surgeons in California
Orthopaedic surgery is Dr. Gjerdrum's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Gjerdrum is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery. Dr. Gjerdrum is licensed in California.
Specialties and state licenses
- Orthopaedic surgery, CaliforniaPrimary
Orthopedic surgeons near Dr. Gjerdrum
Counts of orthopedic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
2,056orthopedic surgeons in California
7orthopedic surgeons in Santa Maria
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Thor C. Gjerdrum billed Medicare for 201 services in 2020
CMS data shows 201 Medicare services from Dr. Gjerdrum across 4 procedure codes in 2020. Medicare paid $10,692 for them. Every service was in an office.
Medicare services, 2020201
Paid by Medicare$10,692
Procedure codes4
Dr. Gjerdrum's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 1222020: 10514%
- Surgery
- 2019: 412020: 6456%
- Drugs given in the office
- 2019: 222020: 3245%
Dr. Gjerdrum compared with the California median for orthopedic surgeons, 2020
- Dr. Gjerdrum
- California median
- Medicare services
- 201vs 68371% below
- Part D claims
- 12vs 7083% below
Medians across 1,844 orthopedic surgeons in California with Dmand AI profiles that report each measure.
Dr. Gjerdrum's most billed Medicare procedure codes, 2020
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. Gjerdrum and other orthopedic surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thor C. Gjerdrum's patients have a median age of 57
Across all payers, Dmand AI patient panel data puts Dr. Gjerdrum's median patient age at 57, with 64% women.
Dr. Gjerdrum's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women64%
- Men36%
Source: Dmand AI Patient Panel Data
Dr. Thor C. Gjerdrum wrote 12 Medicare Part D claims in 2020
In 2020, Dr. Gjerdrum wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $158 in total drug cost. In 2018, CMS named 16 claims across 1 drug.
Part D claims, 202012
Drugs named by CMS1
Total drug cost$158
Dr. Gjerdrum'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, 2018 to 2020
- 2018
- 2020
- Claims for drugs CMS names
- 2018: 162020: 1225%
Drugs named by CMS: 1 in 2020, 1 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Thor C. Gjerdrum has 3 publications on record
Dmand AI links 3 papers to Dr. Gjerdrum in 2011. The most frequent topics are Archaeology.
Papers3
Topics Dr. Gjerdrum writes about most
- Archaeology
Recent publications by Dr. Gjerdrum
Amputation, SurgicalArteriesFemoral Artery
Am J Phys Anthropol
AnemiaArchaeologyFossils
See who Dr. Gjerdrum researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gjerdrum 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. Thor C. Gjerdrum received $88 in industry payments from 2016 to 2018
CMS Open Payments shows 3 general payments to Dr. Gjerdrum from 3 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. DePuy Synthes Sales Inc. paid the most, $34.
General payments to Dr. Gjerdrum by program year, 2016 to 2018
Companies that paid Dr. Gjerdrum the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thor C. Gjerdrum graduated from Creighton University School of Medicine - Omaha
Dr. Gjerdrum graduated from Creighton University School of Medicine - Omaha in 1966.
- Medical school
- Board certified in orthopaedic surgery
Source: Dmand AI Professional Profile Data
Dr. Thor C. Gjerdrum accepts plans from 2 insurance carriers
Dr. Gjerdrum is in network with 2 carriers, including Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Massachusetts
- HCSC
Plan types Dr. Gjerdrum accepts, by number of carriers
- Medicare2
- PPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Thor C. Gjerdrum'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 |
| 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) |
| 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) |
| 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. Thor C. Gjerdrum
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. Thor C. Gjerdrum's NPI number?
Dr. Thor C. Gjerdrum's NPI number is 1407830177. It was assigned on December 5, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Thor C. Gjerdrum?
Dr. Thor C. Gjerdrum is an orthopedic surgeon in Santa Maria, California. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Thor C. Gjerdrum practice?
Dr. Gjerdrum practices at 300 South Stratford Avenue, Santa Maria, CA 93454-5903.
What is Dr. Thor C. Gjerdrum's office phone number?
The practice phone on file for Dr. Gjerdrum is (805) 739-3863.
What is Dr. Thor C. Gjerdrum's medical license number?
Dr. Gjerdrum holds California license G16055.
Does Dr. Thor C. Gjerdrum accept Medicare?
Yes. CMS data shows Dr. Gjerdrum billed Medicare for 201 services in 2020.
Is Dr. Thor C. Gjerdrum board certified?
Yes. Dr. Gjerdrum is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery.
What services does Dr. Thor C. Gjerdrum bill to Medicare?
In 2020, Dr. Gjerdrum's most billed Medicare services were office visit, established patient (99213), surgery: bones and joints (20610) and office visit, established patient (99214).
Where did Dr. Thor C. Gjerdrum go to medical school?
Dr. Gjerdrum graduated from Creighton University School of Medicine - Omaha in 1966.
What drugs does Dr. Thor C. Gjerdrum prescribe most?
In 2020 Medicare Part D data, Dr. Gjerdrum's most prescribed drugs by claims were Meloxicam.
Show 4 more questionsShow fewer questions
Has Dr. Thor C. Gjerdrum received payments from drug or device companies?
CMS Open Payments shows $88 in general payments to Dr. Gjerdrum from 3 companies from 2016 to 2018. The largest total came from DePuy Synthes Sales Inc.
How long has Dr. Thor C. Gjerdrum been practicing?
Dr. Gjerdrum graduated from medical school in 1966, 60 years ago.
Does Dr. Thor C. Gjerdrum do research?
Dmand AI links 3 publications to Dr. Gjerdrum.
What insurance does Dr. Thor C. Gjerdrum accept?
Dr. Gjerdrum is in network with 2 carriers, including Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
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