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Dr. Mark Thomas Hellner, MD
NPI1659384881
- Medicare services, 2017
- 1,365
- Part D claims, 2026
- 34
- Publications
- 1
- Hospital affiliations
- 1
- Industry payments
- $36
- Practice address
- 1421 Oakdale Road, Modesto, CA 95355
- Practice phone
- Call (209) 572-2700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hellner's professional email, personal email and mobile number
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Dr. Mark Thomas Hellner is an orthopedic surgeon in Modesto, California
Dr. Hellner practices at Stanislaus Surgical Hospital in Modesto, California, part of Physicians Surgery Centers.
Dr. Hellner's NPI, 1659384881, was assigned on August 15, 2006. Dr. Hellner graduated from Wayne State University School Of Medicine in 1979. Dr. Hellner's California license number on file is G52055.
NPI and contact details
- NPI
- 1659384881NPI Registry (opens in a new tab)
- NPI enumeration date
- August 15, 2006
- NPI status
- Active
- Practice phone
- (209) 572-2700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Mark Thomas Hellner practices at Stanislaus Surgical Hospital in Modesto, California
Dr. Hellner's primary practice is Stanislaus Surgical Hospital, at 1421 Oakdale Road, Modesto, CA 95355 in Stanislaus County. The practice phone is (209) 572-2700.
- Stanislaus Surgical Hospital1421 Oakdale Road, Modesto, CA 95355 · Stanislaus CountyPhone(209) 572-2700
Source: Dmand AI Affiliation Data
Dr. Mark Thomas Hellner is affiliated with 2 sites of care
Dr. Hellner's primary practice is Stanislaus Surgical Hospital in Modesto, California, part of Physicians Surgery Centers. Dmand AI also links Dr. Hellner to 1 physician office, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark Thomas Hellner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hellner practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stanislaus Surgical Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Hellner practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across Physicians Surgery Centers and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark Thomas Hellner is one of 2,056 orthopedic surgeons in California
Orthopaedic surgery is Dr. Hellner's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dmand AI has Dr. Hellner's licenses on file in 2 states: California and Michigan.
Specialties and state licenses
- Orthopaedic surgery, CaliforniaPrimary
- Michigan license
Orthopedic surgeons near Dr. Hellner
Counts of orthopedic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
2,056orthopedic surgeons in California22orthopedic surgeons in Modesto3orthopedic surgeons at Stanislaus Surgical Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark Thomas Hellner billed Medicare for 1,365 services in 2017
CMS data shows 1,365 Medicare services from Dr. Hellner across 9 procedure codes in 2017. Medicare paid $50,589 for them. Every service was in an office.
Medicare services, 20171,365
Paid by Medicare$50,589
Procedure codes9
Dr. Hellner's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Drugs given in the office
- 2016: 6722017: 60510%
- Office and hospital visits
- 2016: 5552017: 37732%
- Surgery
- 2016: 3892017: 34910%
- Imaging
- 2016: 812017: 3458%
Dr. Hellner compared with the California median for orthopedic surgeons, 2017
- Dr. Hellner
- California median
- Medicare services
- 1,365vs 683100% above
- Part D claims
- 11vs 7084% below
Medians across 1,844 orthopedic surgeons in California with Dmand AI profiles that report each measure.
Dr. Hellner's most billed Medicare procedure codes, 2017
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. Hellner?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hellner and other orthopedic surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Thomas Hellner's patients have a median age of 59
Across all payers, Dmand AI patient panel data puts Dr. Hellner's median patient age at 59, with 30% women.
Dr. Hellner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women30%
- Men70%
Source: Dmand AI Patient Panel Data
Dr. Mark Thomas Hellner wrote 34 Medicare Part D claims in 2026
In 2026, Dr. Hellner wrote 34 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $45 in total drug cost. In 2017, CMS named 340 claims across 8 drugs.
Part D claims, 202634
Drugs named by CMS1
Total drug cost$45
Dr. Hellner's 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, 2017 to 2024
- 2017
- 2024
- Claims for drugs CMS names
- 2017: 3402024: 1197%
Drugs named by CMS: 1 in 2024, 8 in 2017.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2026 data
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Dr. Mark Thomas Hellner has 1 publication on record
Dmand AI links 1 paper to Dr. Hellner.
Papers1
Recent publications by Dr. Hellner
See who Dr. Hellner researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hellner 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. Mark Thomas Hellner received $36 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Hellner from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Molnlycke Health Care US, LLC paid the most, $36.
Companies that paid Dr. Hellner the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark Thomas Hellner graduated from Wayne State University School Of Medicine
Dr. Hellner graduated from Wayne State University School Of Medicine in 1979.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Thomas Hellner'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 Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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)Medicare Part D Prescribers - by Provider (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 |
| 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. Mark Thomas Hellner
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. Mark Thomas Hellner's NPI number?
Dr. Mark Thomas Hellner's NPI number is 1659384881. It was assigned on August 15, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Thomas Hellner?
Dr. Mark Thomas Hellner is an orthopedic surgeon in Modesto, California. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Mark Thomas Hellner practice?
Dr. Hellner practices at 1421 Oakdale Road, Modesto, CA 95355. Dr. Hellner's primary practice is Stanislaus Surgical Hospital in Modesto, California, part of Physicians Surgery Centers. Dmand AI also links Dr. Hellner to 1 physician office, and a free account names each one.
What is Dr. Mark Thomas Hellner's office phone number?
The practice phone on file for Dr. Hellner is (209) 572-2700. Dmand AI also checks direct phone and mobile numbers, available with a free account.
What is Dr. Mark Thomas Hellner's email address?
Dmand AI checks professional and personal email addresses for Dr. Hellner through healthcare-specific waterfall enrichment. They are available with a free Dmand AI account.
What is Dr. Mark Thomas Hellner's medical license number?
Dr. Hellner's California license number on file is G52055, one of the licenses on file in 2 states.
Which states has Dr. Mark Thomas Hellner been licensed in?
Dmand AI has state licenses on file for Dr. Hellner in California (1984 to 2025) and Michigan (1981 to 1986).
Which hospitals is Dr. Mark Thomas Hellner affiliated with?
Dr. Hellner practices at Stanislaus Surgical Hospital in Modesto, California.
Does Dr. Mark Thomas Hellner accept Medicare?
Yes. CMS data shows Dr. Hellner billed Medicare for 1,365 services in 2017.
What services does Dr. Mark Thomas Hellner bill to Medicare?
In 2017, Dr. Hellner's most billed Medicare services were injected or infused drug (J0702), office visit, established patient (99213) and surgery: bones and joints (20610).
Show 6 more questionsShow fewer questions
Where did Dr. Mark Thomas Hellner go to medical school?
Dr. Hellner graduated from Wayne State University School Of Medicine in 1979.
What drugs does Dr. Mark Thomas Hellner prescribe most?
In 2024 Medicare Part D data, Dr. Hellner's most prescribed drugs by claims were Allopurinol.
Has Dr. Mark Thomas Hellner received payments from drug or device companies?
CMS Open Payments shows $36 in general payments to Dr. Hellner from 1 company from 2017 to 2017. The largest total came from Molnlycke Health Care US, LLC.
How long has Dr. Mark Thomas Hellner been practicing?
Dr. Hellner graduated from medical school in 1979, 47 years ago.
Does Dr. Mark Thomas Hellner do research?
Dmand AI links 1 publication to Dr. Hellner.
What EHR does Dr. Mark Thomas Hellner's practice use?
Dmand AI tracks the EHR system at Stanislaus Surgical Hospital and at 1 more affiliated site. The vendor and product are available with a free Dmand AI account.
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