BracesMagnetic Resonance ImagingRange of Motion, Articular
Dr. Theodore K. Gregorius, MD
NPI1013950450PAC ID8921029984
- Medicare services, 2024
- 1,891
- Medicare patients, 2024
- 219
- Part D claims, 2024
- 110
- Publications
- 1
- MIPS score, 2024
- 75
- Practice address
- 360 San Miguel Dr, Newport Beach, CA 92660
- Practice phone
- Call (949) 759-0995
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
P. James Voloshin M.D., Inc
Newport Beach, California
Find Dr. Gregorius' 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. Theodore K. Gregorius is an orthopedic surgeon in Newport Beach, California
Dr. Gregorius practices at P. James Voloshin M.D., Inc in Newport Beach, California.
Dr. Gregorius' NPI, 1013950450, was assigned on June 14, 2006. Dr. Gregorius graduated from Loma Linda University School Of Medicine in 2000. Dr. Gregorius holds California license A84930.
NPI and contact details
- NPI
- 1013950450NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8921029984
- NPI enumeration date
- June 14, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (949) 759-0995
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Theodore K. Gregorius practices at P. James Voloshin M.D., Inc in Newport Beach, California
Dr. Gregorius' primary practice is P. James Voloshin M.D., Inc, at 360 San Miguel Dr, Newport Beach, CA 92660 in Orange County. The practice phone is (949) 759-0995.
- P. James Voloshin M.D., Inc360 San Miguel Dr, Newport Beach, CA 92660 · Orange CountyPhone(949) 759-0995
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Theodore K. Gregorius is affiliated with 6 sites of care and 3 medical groups
Dr. Gregorius' primary practice is P. James Voloshin M.D., Inc in Newport Beach, California. Dr. Gregorius is also affiliated with Hoag Hospital Newport Beach. The medical group on file is Loma Linda University Faculty Medical Group (LLUFMG). Dmand AI also links Dr. Gregorius to 1 more hospital, 2 group practices and clinics, 2 medical groups and 1 physician office, each named with a free account.
P. James Voloshin M.D., IncPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Theodore K. Gregorius' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gregorius practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| P. James Voloshin M.D., Inc | Available with a free account |
| +5 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Gregorius practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Theodore K. Gregorius is one of 2,056 orthopedic surgeons in California
Orthopaedic surgery is Dr. Gregorius' primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Gregorius is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery. Dr. Gregorius is licensed in California.
Specialties and state licenses
- Orthopaedic surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists arthritis, bursitis, enthesopathy in arms, fluid in a joint, joint arthropathy, joint pain, knee arthroscopy and knee injury among the conditions Dr. Gregorius treats.
Orthopedic surgeons near Dr. Gregorius
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. Theodore K. Gregorius billed Medicare for 1,891 services in 2024
CMS data shows 1,891 Medicare services from Dr. Gregorius across 9 procedure codes in 2024, for 219 Medicare patients. Medicare paid $52,423 for them. Every service was in an office.
Medicare services, 20241,891
Medicare patients219
Paid by Medicare$52,423
Procedure codes9
Dr. Gregorius' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 1,0832024: 1,20011%
- Office and hospital visits
- 2023: 3672024: 3701%
- Imaging
- 2023: 1452024: 17722%
- Surgery
- 2023: 1652024: 14413%
Dr. Gregorius compared with the California median for orthopedic surgeons, 2024
- Dr. Gregorius
- California median
- Medicare services
- 1,891vs 6832.8 times
- Medicare patients
- 219vs 215Close to median
- Part D claims
- 78vs 7011% above
Medians across 1,844 orthopedic surgeons in California with Dmand AI profiles that report each measure.
Dr. Gregorius' 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.
Need commercial claims for Dr. Gregorius?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gregorius and other orthopedic surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Theodore K. Gregorius treated 219 Medicare patients in 2024, average age 73
CMS counts 219 Medicare patients who saw Dr. Gregorius in 2024. The largest group is 65 to 74, with 131 patients. 75% of them have arthritis, and 75% have high cholesterol. Their average risk score is 0.92, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Gregorius' median patient age at 60, with 45% women.
Medicare patients, 2024219
Average age73
Average risk score0.92
Dr. Gregorius' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Gregorius' Medicare patients by sex, 2024
- Women12557%
- Men9443%
Chronic conditions among Dr. Gregorius' Medicare patients, 2024
- Arthritis75%
- High cholesterol75%
- High blood pressure61%
- Anxiety22%
- Ischemic heart disease21%
- Mood disorders19%
- Cancer17%
- Depression16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gregorius' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women45%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Theodore K. Gregorius wrote 110 Medicare Part D claims in 2024
In 2024, Dr. Gregorius wrote 110 Medicare Part D claims for 30 patients. 100% of them were for generic drugs. CMS names the drug for 78 of them, across 3 drugs with 11 or more claims each, at $338 in total drug cost. In 2023, CMS named 87 claims across 4 drugs.
Part D claims, 2024110
Drugs named by CMS3
Total drug cost$338
Part D patients30
Dr. Gregorius' 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.
Drug classes CMS tracks in Dr. Gregorius' Part D claims, 2024
- Opioids31%34 of 110 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 872024: 7810%
Drugs named by CMS: 3 in 2024, 4 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. Theodore K. Gregorius 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. Gregorius for performance year 2024, reported individually. Dr. Gregorius accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 46 procedures of upper limb (arm) arthroscopy (minimally invasive joint repair) by Dr. Gregorius, more than 84% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- MIPS final score, 2024
- 75 of 100
Where Dr. Gregorius ranks in Medicare procedure volume
- Upper limb (arm) arthroscopy (minimally invasive joint repair)
- 84th percentile46 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Hip replacement: 1 to 10 procedures (CMS shows small counts as a range)
Lower limb (leg) arthroscopy (minimally invasive joint repair): 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)
For MedTech and pharma teams
Find orthopedic surgeons like Dr. Gregorius by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Theodore K. Gregorius has 1 publication on record
Dmand AI links 1 paper to Dr. Gregorius. Dr. Gregorius' most frequent co-author is Hasan Mahmood Syed, MD.
Papers1
Dr. Gregorius' most frequent co-authors
Recent publications by Dr. Gregorius
See who Dr. Gregorius researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gregorius 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. Theodore K. Gregorius received $7,156 in industry payments from 2016 to 2024
CMS Open Payments shows 57 general payments to Dr. Gregorius from 11 drug and device companies from 2016 to 2024. Travel and lodging make up the largest share, 46% of the total. CONMED Corporation paid the most, $2,515.
General payments to Dr. Gregorius by program year, 2016 to 2024
General payments to Dr. Gregorius by kind, 2016 to 2024
$7.2Kin total
- Travel and lodging$3,32746%
- Speaker and faculty fees$2,50035%
- Food and beverage$1,32919%
Companies that paid Dr. Gregorius the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Theodore K. Gregorius has 1 award and honors on record
Dmand AI lists 1 award for Dr. Gregorius.
Awards and honors for Dr. Gregorius
- Undated
- Compassionate Doctors
Source: Dmand AI Professional Profile Data
Dr. Theodore K. Gregorius graduated from Loma Linda University School Of Medicine
Dr. Gregorius graduated from Loma Linda University School Of Medicine in 2000.
- Medical school
- Board certified in orthopaedic surgery
Source: Dmand AI Professional Profile Data
Dr. Theodore K. Gregorius accepts plans from 5 insurance carriers
Dr. Gregorius is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
Plan types Dr. Gregorius accepts, by number of carriers
- Medicare5
- PPO4
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Theodore K. Gregorius'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) |
| 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 |
| 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. Theodore K. Gregorius
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. Theodore K. Gregorius' NPI number?
Dr. Theodore K. Gregorius' NPI number is 1013950450. It was assigned on June 14, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Theodore K. Gregorius?
Dr. Theodore K. Gregorius is an orthopedic surgeon in Newport Beach, California. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Theodore K. Gregorius practice?
Dr. Gregorius practices at 360 San Miguel Dr, Newport Beach, CA 92660. Dr. Gregorius' primary practice is P. James Voloshin M.D., Inc in Newport Beach, California. Dmand AI also links Dr. Gregorius to 1 hospital, 2 group practices and clinics, 2 medical groups and 1 physician office.
What is Dr. Theodore K. Gregorius' office phone number?
The practice phone on file for Dr. Gregorius is (949) 759-0995.
What is Dr. Theodore K. Gregorius' medical license number?
Dr. Gregorius holds California license A84930.
Which hospitals is Dr. Theodore K. Gregorius affiliated with?
Dr. Gregorius is affiliated with Hoag Hospital Newport Beach. Dmand AI links Dr. Gregorius to 1 more hospital.
What medical group is Dr. Theodore K. Gregorius part of?
Dr. Gregorius is linked to Loma Linda University Faculty Medical Group (LLUFMG). Dmand AI links Dr. Gregorius to 2 more medical groups.
Does Dr. Theodore K. Gregorius accept Medicare?
Yes. CMS data shows Dr. Gregorius billed Medicare for 1,891 services in 2024, and Dr. Gregorius accepts Medicare assignment.
What is Dr. Theodore K. Gregorius' MIPS score?
Dr. Gregorius' MIPS final score for performance year 2024 is 75 out of 100, reported individually.
How many Medicare patients does Dr. Theodore K. Gregorius see?
CMS counts 219 Medicare patients who saw Dr. Gregorius in 2024, with an average age of 73.
Show 9 more questionsShow fewer questions
Is Dr. Theodore K. Gregorius board certified?
Yes. Dr. Gregorius is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery.
What services does Dr. Theodore K. Gregorius bill to Medicare?
In 2024, Dr. Gregorius' most billed Medicare services were injected or infused drug (J3301), surgery: bones and joints (20611) and office visit, established patient (99214).
Where did Dr. Theodore K. Gregorius go to medical school?
Dr. Gregorius graduated from Loma Linda University School Of Medicine in 2000.
What drugs does Dr. Theodore K. Gregorius prescribe most?
In 2024 Medicare Part D data, Dr. Gregorius' most prescribed drugs by claims were Gabapentin, Hydrocodone-Acetaminophen and Ondansetron ODT.
Has Dr. Theodore K. Gregorius received payments from drug or device companies?
CMS Open Payments shows $7,156 in general payments to Dr. Gregorius from 11 companies from 2016 to 2024. The largest total came from CONMED Corporation.
How long has Dr. Theodore K. Gregorius been practicing?
Dr. Gregorius graduated from medical school in 2000, 26 years ago.
Does Dr. Theodore K. Gregorius do research?
Dmand AI links 1 publication to Dr. Gregorius.
Who does Dr. Theodore K. Gregorius publish with?
Dr. Gregorius' most frequent co-authors are Hasan Mahmood Syed, MD (1 shared paper).
What insurance does Dr. Theodore K. Gregorius accept?
Dr. Gregorius is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
Selling to orthopaedic surgery practices?
See orthopedic surgeons in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card