Dr. Mark L Prasarn , MD
Orthopaedic Surgery • Houston, TX
6414 Fannin St Ste G150
Houston, TX 770301514
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 Prasarn is listed in NPPES under Orthopaedic Surgery.
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NPI assigned on June 1, 2007; this date does not establish years in practice.
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Published CMS data list 634 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 — Established patient outpatient office visit: 161 service units.
- 72100 — X-ray of lower and sacral spine, 2-3 views: 142 service units.
- 99213 — Established patient outpatient office visit: 101 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). 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 587 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:
- Gabapentin — 167 prescription fills, including refills.
- Meloxicam — 167 prescription fills, including refills.
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) — 95 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 all 8 records in the table · Guide: How to read Medicare Part D prescriber data
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Close to the middle for Medicare Part B services among clinicians listed under Orthopaedic Surgery in Houston, TX (2024, 110 clinicians with data). Median for this group: 1,006. Middle half: 166 to 3,889.
Fewer Medicare Part B services than 65% of clinicians listed under Orthopaedic Surgery in Texas (2024, 925 clinicians with data). Median for this group: 1,519. Middle half: 441 to 3,971.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 599 in 2020 to 634 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
6414 Fannin St Ste G150
Houston, TX 770301514
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 2 distinct group names: Houston Methodist Specialty Physicians; Tmh Physician Associates Pllc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
New York University School Of Medicine
2003
What Public CMS Data Show
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
361 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $84,721 in 2024
The total amount Medicare approved for these services in 2024. 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, 2024.
Paid by Medicare
About $65,243 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, 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, 2024.
30-day fills
627 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
$5,184 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.
Open Payments general payments, program year 2025
All general payments: $35,524.05 across 42 records.
By nature of payment (3 largest of 4)
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program: $20,150.00 across 7 records.
- Consulting Fee: $9,750.00 across 2 records.
- Travel and Lodging: $3,281.67 across 8 records.
Reporting-company totals (3 largest of 11)
- Heron Therapeutics, Inc.: $21,249.19 across 19 records.
- Alphatec Spine, Inc: $12,981.37 across 12 records.
- Medtronic, Inc.: $427.33 across 3 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
23 years (graduated 2003)
CMS Doctors and Clinicians data list 2003 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2007
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.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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.
Enrolled in Medicare (PECOS)
Dr. Prasarn has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Prasarn as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Houston and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Close to the middle for clinicians listed under Orthopaedic Surgery in Houston, TX (2024, 110 clinicians with data). Median for this group: 1,006. Middle half: 166 to 3,889.
Fewer Medicare Part B services than 65% of clinicians listed under Orthopaedic Surgery in Texas (2024, 925 clinicians with data). Median for this group: 1,519. Middle half: 441 to 3,971.
Medicare-allowed amount
Close to the middle for clinicians listed under Orthopaedic Surgery in Houston, TX (2024, 110 clinicians with data). Median for this group: $77,510. Middle half: $14,045 to $171,180.
Close to the middle for clinicians listed under Orthopaedic Surgery in Texas (2024, 925 clinicians with data). Median for this group: $93,061. Middle half: $33,032 to $185,853.
Paid by Medicare
Close to the middle for clinicians listed under Orthopaedic Surgery in Houston, TX (2024, 110 clinicians with data). Median for this group: $56,457. Middle half: $9,720 to $124,830.
Close to the middle for clinicians listed under Orthopaedic Surgery in Texas (2024, 925 clinicians with data). Median for this group: $68,861. Middle half: $24,418 to $138,660.
Medicare Part D prescriptions
More Part D prescriptions than 65% of clinicians listed under Orthopaedic Surgery in Houston, TX (2024, 110 clinicians with data). Median for this group: 302. Middle half: 110 to 708.
More Part D prescriptions than 70% of clinicians listed under Orthopaedic Surgery in Texas (2024, 928 clinicians with data). Median for this group: 324. Middle half: 137 to 652.
Part D drug cost
A higher Part D drug cost than 70% of clinicians listed under Orthopaedic Surgery in Houston, TX (2024, 110 clinicians with data). Median for this group: $2,020. Middle half: $729 to $7,055.
A higher Part D drug cost than 65% of clinicians listed under Orthopaedic Surgery in Texas (2024, 928 clinicians with data). Median for this group: $2,682. Middle half: $992 to $6,723.
193 active clinicians are listed under Orthopaedic Surgery with a practice address in Houston, TX (1,515 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Houston
6.7% of these 193 clinicians have the CMS telehealth indicator.
64.8% of these 193 clinicians are listed by CMS as accepting Medicare assignment.
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
Medicare Part B services varied from year to year: 599 in 2020 and 634 in 2024.
- 2020: 599
- 2021: 394
- 2022: 308
- 2023: 334
- 2024: 634
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Medicare-allowed amount
Medicare-allowed amount decreased 48% from $163,951 in 2020 to $84,721 in 2024.
- 2020: $163,951
- 2021: $68,628
- 2022: $77,643
- 2023: $38,519
- 2024: $84,721
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Paid by Medicare
Paid by Medicare decreased 50% from $130,699 in 2020 to $65,243 in 2024.
- 2020: $130,699
- 2021: $53,308
- 2022: $61,445
- 2023: $29,630
- 2024: $65,243
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 57% from 373 in 2020 to 587 in 2024.
- 2020: 373
- 2021: 319
- 2022: 521
- 2023: 379
- 2024: 587
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30-day fills
30-day fills increased 50% from 417 in 2020 to 627 in 2024.
- 2020: 417
- 2021: 370
- 2022: 575
- 2023: 432
- 2024: 627
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Part D drug cost
Part D drug cost increased 61% from $3,218 in 2020 to $5,184 in 2024.
- 2020: $3,218
- 2021: $3,032
- 2022: $5,028
- 2023: $3,472
- 2024: $5,184
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Industry payments (Open Payments)
Industry payments (Open Payments) increased 785% from $4,016.04 in 2021 to $35,524.05 in 2025.
- 2021: $4,016.04
- 2022: $14,663.90
- 2023: $8,143.82
- 2024: $36,517.25
- 2025: $35,524.05
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): 42 records totaling $35,524.05.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Heron Therapeutics, Inc. |
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
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APONVIE | General | $9,750.00 |
| Alphatec Spine, Inc |
Consulting Fee
Cash or cash equivalent
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INSIGNIA ACP | General | $7,375.00 |
| Heron Therapeutics, Inc. |
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
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ZYNRELEF | General | $3,900.00 |
| Heron Therapeutics, Inc. |
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
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ZYNRELEF | General | $3,900.00 |
| Alphatec Spine, Inc |
Consulting Fee
Cash or cash equivalent
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— | General | $2,375.00 |
| Alphatec Spine, Inc |
Travel and Lodging
In-kind items and services
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— | General | $1,160.48 |
| Alphatec Spine, Inc |
Travel and Lodging
In-kind items and services
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Other - Miscellaneous | General | $806.81 |
| Heron Therapeutics, Inc. |
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
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ZYNRELEF | General | $650.00 |
| Heron Therapeutics, Inc. |
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
|
ZYNRELEF | General | $650.00 |
| Heron Therapeutics, Inc. |
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
|
ZYNRELEF | General | $650.00 |
| Heron Therapeutics, Inc. |
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
|
APONVIE | General | $650.00 |
| Alphatec Spine, Inc |
Travel and Lodging
In-kind items and services
|
Other - Miscellaneous | General | $510.00 |
| Heron Therapeutics, Inc. |
Travel and Lodging
Cash or cash equivalent
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APONVIE | General | $506.98 |
| Alphatec Spine, Inc |
Food and Beverage
In-kind items and services
|
Other - Miscellaneous | General | $277.61 |
| Providence Medical Technology, Inc. |
Food and Beverage
In-kind items and services
|
— | General | $215.13 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
UNID_PASS | General | $174.96 |
| Alphatec Spine, Inc |
Food and Beverage
In-kind items and services
|
— | General | $174.40 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
UNID_PASS | General | $170.46 |
| Alphatec Spine, Inc |
Travel and Lodging
In-kind items and services
|
Other - Miscellaneous | General | $170.00 |
| SI-BONE, INC. |
Food and Beverage
Cash or cash equivalent
|
— | General | $159.38 |
| DePuy Synthes Sales Inc. |
Food and Beverage
In-kind items and services
|
SYMPHONY | General | $146.65 |
| Sanara MedTech Inc. |
Food and Beverage
Cash or cash equivalent
|
CellerateRX | General | $128.70 |
| BIOTRONIK NRO, Inc. |
Food and Beverage
In-kind items and services
|
Prospera | General | $123.18 |
| Heron Therapeutics, Inc. |
Food and Beverage
Cash or cash equivalent
|
ZYNRELEF | General | $121.86 |
| Heron Therapeutics, Inc. |
Food and Beverage
In-kind items and services
|
ZYNRELEF | General | $102.43 |
(top 25 shown)
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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, 2017–2024; 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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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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161 | 142 | $314.00 | $128.47 |
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72100
X-ray of lower and sacral spine, 2-3 views
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142 | 125 | $135.00 | $39.74 |
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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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101 | 95 | $212.00 | $90.56 |
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72040
X-ray of upper spine, 2-3 views
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71 | 57 | $142.00 | $39.43 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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48 | 48 | $317.00 | $112.69 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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34 | 34 | $483.00 | $169.04 |
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99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
|
29 | 27 | $421.00 | $181.90 |
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22853
Insertion of cage or mesh device to spine bone and disc space during spine fusion
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24 | 14 | $1376.00 | $271.97 |
|
63047
Partial removal of spine bone with release of lower spinal cord and/or nerves, 1 segment
|
24 | 24 | $5521.00 | $978.71 |
Source: CMS Part B by Provider and Service, 2024; 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 |
|---|---|---|---|---|---|
| Gabapentin | Gabapentin | 167 | 5,413 | $1,121.41 | 76 |
| Meloxicam | Meloxicam | 167 | 5,114 | $591.14 | 74 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 95 | 575 | $913.23 | 80 |
| Tizanidine Hcl | Tizanidine Hcl | 48 | 1,581 | $265.55 | 30 |
| Celecoxib | Celecoxib | 42 | 1,335 | $1,715.48 | 24 |
| Methocarbamol | Methocarbamol | 24 | 940 | $354.66 | 11 |
| Methylprednisolone | Methylprednisolone | 23 | 133 | $171.44 | 23 |
| Tramadol Hcl | Tramadol Hcl | 21 | 154 | $51.42 | 16 |
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.
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
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ORTHOPEDIC SURGERY
I20110921000348
TX
8224181292
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Houston Methodist Specialty Physicians
6565 Fannin St, Houston, TX 770302703
Houston Methodist Specialty Physicians
6445 Main St, Houston, TX 770301502
Phone: 7134413150
Houston Methodist Specialty Physicians
5505 W Loop S, Houston, TX 770812206
Phone: 7134419000
Houston Methodist Specialty Physicians
6565 Fannin St, Houston, TX 770302703
Tmh Physician Associates Pllc
6445 Main St, Houston, TX 770301502
Phone: 7134414347
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Orthopaedic Surgery - Orthopaedic Trauma
Doctor of Medicine (M.D.)
Student in an Organized Health Care Education/Training Program
Doctor of Medicine (M.D.)
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Orthopaedic Surgery - Sports Medicine
Doctor of Medicine (M.D.)
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated June 01, 2007.
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 Houston
- Dr. Phillip Williams, MD
- Dr. Natalie Rumbaugh, MD
- Dr. Tiffany Huynh, MD
- Dr. Matthew Koepplinger, DO
- Dr. Terry Clyburn, MD, PA
- Dr. Graham Milam, MD
Mailing Address
6414 Fannin St Ste G150
Houston, TX 770301514
Phone: 7134867500