Dr. Mark Thomas Hellner , MD
Orthopaedic Surgery • Merced, CA
900 W Olive Ave, Suite A
Merced, CA 953482429
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Mark Hellner is listed in NPPES under Orthopaedic Surgery.
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NPI assigned on August 15, 2006; this date does not establish years in practice.
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Published CMS data list 1,365 Original Medicare Part B services in 2017.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017. Published rows only; this is not a quality measure.
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Published Part B service records, 2017:
- J0702 — Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg: 460 service units.
- 99213 — Established patient outpatient office visit: 289 service units.
- 20610 — Aspiration and/or injection of fluid from large joint: 242 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2016 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2017). CPT notice
See all 9 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 11 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Allopurinol — 11 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 95% of clinicians listed under Orthopaedic Surgery in California (2024, 1,131 clinicians with data). Median for this group: 139. Middle half: 45 to 347.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 610 in 2014 to 11 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2014–2024.
Practice Location & Contact Primary Location
900 W Olive Ave
Suite A
Merced, CA 953482429
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $71,170 in 2017
The total amount Medicare approved for these services in 2017. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017.
Paid by Medicare
About $50,591 in 2017
The part of the Medicare-allowed amount that Medicare itself paid in 2017, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017.
30-day fills
15 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$45 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Merced and California
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 95% of clinicians listed under Orthopaedic Surgery in California (2024, 1,131 clinicians with data). Median for this group: 139. Middle half: 45 to 347.
Too few clinicians listed under Orthopaedic Surgery in Merced have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 95% of clinicians listed under Orthopaedic Surgery in California (2024, 1,131 clinicians with data). Median for this group: $1,211. Middle half: $355 to $3,502.
Too few clinicians listed under Orthopaedic Surgery in Merced have Medicare Part D data for 2024 to compare.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Hellner are from 2017.
9 active clinicians are listed under Orthopaedic Surgery with a practice address in Merced, CA (2,281 in California).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
CMS data for Medicare Part B services are available for 2017 only.
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Medicare-allowed amount
CMS data for Medicare-allowed amount are available for 2017 only.
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Paid by Medicare
CMS data for Medicare payment amount are available for 2017 only.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 98% from 610 in 2014 to 11 in 2024.
- 2014: 610
- 2015: 316
- 2016: 392
- 2017: 340
- 2024: 11
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30-day fills
30-day fills decreased 98% from 681 in 2014 to 15 in 2024.
- 2014: 681
- 2015: 377
- 2016: 458
- 2017: 431
- 2024: 15
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Part D drug cost
Part D drug cost decreased 100% from $9,250 in 2014 to $45 in 2024.
- 2014: $9,250
- 2015: $3,306
- 2016: $4,608
- 2017: $3,563
- 2024: $45
Sources: CMS Medicare Physician & Other Practitioners (2017), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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J0702
Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg
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460 | 121 | $10.00 | $6.63 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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289 | 150 | $95.00 | $70.86 |
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20610
Aspiration and/or injection of fluid from large joint
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242 | 81 | $85.00 | $51.57 |
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J7324
Hyaluronan or derivative, orthovisc, for intra-articular injection, per dose
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145 | 32 | $250.00 | $146.38 |
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20550
Injection into tendon or ligament
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107 | 67 | $85.00 | $45.97 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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48 | 46 | $140.00 | $104.23 |
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99202
New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more
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40 | 40 | $140.00 | $72.70 |
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73565
X-ray of both knees while standing
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19 | 19 | $60.00 | $35.65 |
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73030
X-ray of shoulder, minimum of 2 views
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15 | 13 | $70.00 | $28.66 |
Source: CMS Part B by Provider and Service, 2017; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Allopurinol | Allopurinol | 11 | 450 | $45.00 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207X00000X
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
Additional State Medicaid & Healthcare Payer Identifiers
Career & Practice History
NPI enumerated August 15, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Orthopaedic Surgery Specialists in Merced
- Dr. Samuel Tacke, MD
- Dr. Raymond Delorenzi, MD
- Dr. Mario Sablan, DO
- Dr. Abner Ward, MD
- Dr. Naseem Beauchman, MD
- Dr. Ricardo Pyfrom, MD
Mailing Address
900 W Olive Ave, Suite A
Merced, CA 953482429
Phone: 2093880730