Mark R. Gillen , PA
Physician Assistant • Tulsa, OK
6160 S Yale Ave
Tulsa, OK 741361930
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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NPI assigned on April 28, 2006; this date does not establish years in practice.
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Published CMS data list 2,205 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:
- 87804 — Detection test by immunoassay with direct visual observation for influenza virus: 416 service units.
- 99214 — Established patient outpatient office visit: 360 service units.
- 99213 — Established patient outpatient office visit: 335 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 24 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 1,788 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:
- Cefdinir — 198 prescription fills, including refills.
- Azithromycin — 164 prescription fills, including refills.
- Methylprednisolone — 164 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 26 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 90% of clinicians listed under Physician Assistant in Tulsa, OK (2024, 218 clinicians with data). Median for this group: 312. Middle half: 104 to 809.
More Medicare Part B services than 85% of clinicians listed under Physician Assistant in Oklahoma (2024, 947 clinicians with data). Median for this group: 315. Middle half: 123 to 859.
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 1,314 in 2020 to 2,205 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
6160 S Yale Ave
Tulsa, OK 741361930
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 1 group name: Warren Clinic Inc. 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
2001
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
848 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 $102,943 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 $74,148 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
1,854 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
$20,811 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: $442.60 across 20 records.
By nature of payment
- Food and Beverage: $442.60 across 20 records.
Reporting-company totals (3 largest of 6)
- AstraZeneca Pharmaceuticals LP: $303.09 across 13 records.
- Pfizer Inc.: $55.32 across 3 records.
- Salix Pharmaceuticals, a division of Bausch Health US, LLC: $23.86 across 1 record.
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
25 years (graduated 2001)
CMS Doctors and Clinicians data list 2001 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
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.
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?”
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Mark Gillen 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 Mark Gillen 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 Tulsa and Oklahoma
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 90% of clinicians listed under Physician Assistant in Tulsa, OK (2024, 218 clinicians with data). Median for this group: 312. Middle half: 104 to 809.
More Medicare Part B services than 85% of clinicians listed under Physician Assistant in Oklahoma (2024, 947 clinicians with data). Median for this group: 315. Middle half: 123 to 859.
Medicare-allowed amount
A higher Medicare-allowed amount than 90% of clinicians listed under Physician Assistant in Tulsa, OK (2024, 218 clinicians with data). Median for this group: $23,811. Middle half: $8,485 to $47,709.
A higher Medicare-allowed amount than 90% of clinicians listed under Physician Assistant in Oklahoma (2024, 947 clinicians with data). Median for this group: $20,534. Middle half: $8,490 to $45,172.
Paid by Medicare
A higher Medicare payment amount than 90% of clinicians listed under Physician Assistant in Tulsa, OK (2024, 218 clinicians with data). Median for this group: $17,044. Middle half: $6,232 to $35,273.
A higher Medicare payment amount than 90% of clinicians listed under Physician Assistant in Oklahoma (2024, 947 clinicians with data). Median for this group: $14,881. Middle half: $6,219 to $32,810.
Medicare Part D prescriptions
More Part D prescriptions than 90% of clinicians listed under Physician Assistant in Tulsa, OK (2024, 201 clinicians with data). Median for this group: 213. Middle half: 63 to 584.
More Part D prescriptions than 80% of clinicians listed under Physician Assistant in Oklahoma (2024, 938 clinicians with data). Median for this group: 239. Middle half: 62 to 934.
Part D drug cost
A higher Part D drug cost than 65% of clinicians listed under Physician Assistant in Tulsa, OK (2024, 201 clinicians with data). Median for this group: $3,836. Middle half: $623 to $80,688.
A higher Part D drug cost than 60% of clinicians listed under Physician Assistant in Oklahoma (2024, 938 clinicians with data). Median for this group: $5,092. Middle half: $598 to $115,221.
393 active clinicians are listed under Physician Assistant with a practice address in Tulsa, OK (1,870 in Oklahoma).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Tulsa
13.2% of these 393 clinicians have the CMS telehealth indicator.
73% of these 393 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 increased 68% from 1,314 in 2020 to 2,205 in 2024.
- 2020: 1,314
- 2021: 1,787
- 2022: 1,672
- 2023: 1,688
- 2024: 2,205
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Medicare-allowed amount
Medicare-allowed amount increased 92% from $53,688 in 2020 to $102,943 in 2024.
- 2020: $53,688
- 2021: $84,032
- 2022: $79,588
- 2023: $82,973
- 2024: $102,943
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Paid by Medicare
Paid by Medicare increased 103% from $36,471 in 2020 to $74,148 in 2024.
- 2020: $36,471
- 2021: $66,855
- 2022: $67,089
- 2023: $66,279
- 2024: $74,148
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 121% from 810 in 2020 to 1,788 in 2024.
- 2020: 810
- 2021: 1,153
- 2022: 1,144
- 2023: 1,384
- 2024: 1,788
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30-day fills
30-day fills increased 128% from 813 in 2020 to 1,854 in 2024.
- 2020: 813
- 2021: 1,207
- 2022: 1,243
- 2023: 1,443
- 2024: 1,854
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Part D drug cost
Part D drug cost increased 73% from $12,050 in 2020 to $20,811 in 2024.
- 2020: $12,050
- 2021: $15,310
- 2022: $17,344
- 2023: $19,250
- 2024: $20,811
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $61.67 in 2021 to $442.60 in 2025.
- 2021: $61.67
- 2022: $82.20
- 2023: $36.86
- 2024: $230.97
- 2025: $442.60
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): 20 records totaling $442.60.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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AIRSUPRA | General | $77.22 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC |
Food and Beverage
In-kind items and services
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XIFAXAN | General | $23.86 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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AIRSUPRA | General | $22.53 |
| Kowa Pharmaceuticals America, Inc. |
Food and Beverage
In-kind items and services
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ZORYVE | General | $22.20 |
| Dynavax Technologies Corporation |
Food and Beverage
In-kind items and services
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Heplisav-B | General | $21.09 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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AIRSUPRA | General | $20.74 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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AIRSUPRA | General | $20.30 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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AIRSUPRA | General | $20.26 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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PAXLOVID | General | $20.15 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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AIRSUPRA | General | $19.98 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
AIRSUPRA | General | $19.97 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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AIRSUPRA | General | $19.60 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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AIRSUPRA | General | $19.04 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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PAXLOVID | General | $18.69 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $17.04 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
PAXLOVID | General | $16.48 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
AIRSUPRA | General | $16.26 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
— | General | $16.21 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
AIRSUPRA | General | $15.75 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
AIRSUPRA | General | $15.23 |
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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87804
Detection test by immunoassay with direct visual observation for influenza virus
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416 | 200 | $95.00 | $16.15 |
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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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360 | 334 | $213.44 | $99.34 |
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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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335 | 310 | $151.34 | $70.87 |
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87651
Detection test by nucleic acid for strep (streptococcus, group a), amplified probe technique
|
143 | 137 | $70.00 | $34.18 |
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J3301
Injection, triamcinolone acetonide, not otherwise specified, 10 mg
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136 | 27 | $4.00 | $1.02 |
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J2405
Injection, ondansetron hydrochloride, per 1 mg
|
92 | 22 | $4.00 | $0.09 |
|
93005
Routine electrocardiogram (ecg) using at least 12 leads with tracing
|
90 | 89 | $26.00 | $5.52 |
|
96372
Injection of drug or substance under skin or into muscle
|
90 | 74 | $52.00 | $11.18 |
|
99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
|
80 | 80 | $208.00 | $86.96 |
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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
|
78 | 78 | $317.00 | $132.26 |
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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
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61 | 61 | $300.28 | $140.54 |
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71046
X-ray of chest, 2 views
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56 | 55 | $51.00 | $20.47 |
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J0696
Injection, ceftriaxone sodium, per 250 mg
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52 | 11 | $6.00 | $0.44 |
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90471
Administration of vaccine
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29 | 29 | $41.00 | $15.35 |
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90714
Diphtheria and tetanus vaccine (7 years or older)
|
29 | 29 | $40.00 | $25.63 |
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87807
Detection test by immunoassay with direct visual observation for respiratory syncytial virus
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27 | 26 | $65.00 | $12.84 |
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J7030
Infusion, normal saline solution , 1000 cc
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23 | 23 | $4.00 | $2.57 |
|
69209
Removal of impacted ear wax by washing
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20 | 20 | $44.65 | $14.59 |
|
99421
Online digital evaluation and management service for an established patient for up to 7 days, total time 5-10 minutes
|
19 | 19 | $35.00 | $11.87 |
|
96374
Injection of drug or substance into vein
|
17 | 17 | $115.00 | $27.72 |
|
A4565
Slings
|
14 | 14 | $18.00 | $10.35 |
|
96361
Infusion into a vein for hydration, each additional hour
|
13 | 11 | $30.00 | $9.20 |
|
J1580
Injection, garamycin, gentamicin, up to 80 mg
|
13 | 13 | $4.00 | $2.58 |
|
96360
Infusion into a vein for hydration, 31-60 minutes
|
12 | 12 | $112.00 | $23.94 |
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 |
|---|---|---|---|---|---|
| Cefdinir | Cefdinir | 198 | 1,736 | $4,302.33 | 194 |
| Azithromycin | Azithromycin | 164 | 818 | $1,090.96 | 162 |
| Methylprednisolone | Methylprednisolone | 164 | 984 | $1,386.61 | 161 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 154 | 2,615 | $3,151.26 | 151 |
| Ipratropium Bromide | Ipratropium Bromide | 143 | 5,839 | $2,840.95 | 124 |
| Lidocaine Hcl Viscous | Lidocaine Hcl | 130 | 409 | $770.81 | 128 |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 99 | 986 | $1,003.02 | 97 |
| Prednisone | Prednisone | 95 | 428 | $126.55 | 93 |
| Doxycycline Hyclate | Doxycycline Hyclate | 89 | 715 | $638.69 | 87 |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 70 | 584 | $349.75 | 70 |
| Ondansetron Odt | Ondansetron | 69 | 276 | $260.27 | 68 |
| Mupirocin | Mupirocin | 62 | 692 | $469.43 | 62 |
| Acetaminophen-Codeine | Acetaminophen With Codeine | 60 | 396 | $382.78 | 59 |
| Tizanidine Hcl | Tizanidine Hcl | 40 | 304 | $173.99 | 40 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 33 | 324 | $398.08 | 33 |
| Oseltamivir Phosphate | Oseltamivir Phosphate | 28 | 145 | $830.26 | 28 |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 26 | 639 | $163.12 | 26 |
| Levofloxacin | Levofloxacin | 25 | 242 | $176.95 | 25 |
| Amoxicillin | Amoxicillin | 25 | 244 | $85.34 | 25 |
| Paxlovid | Nirmatrelvir/Ritonavir | 25 | 127 | $0.00 | 25 |
| Clindamycin Hcl | Clindamycin Hcl | 23 | 221 | $287.51 | 23 |
| Ciprofloxacin-Dexamethasone | Ciprofloxacin Hcl/Dexameth | 16 | 171 | $1,538.60 | 16 |
| Fluconazole | Fluconazole | 14 | 57 | $78.43 | 13 |
| Omeprazole | Omeprazole | 13 | 690 | $100.40 | — |
| Bacitracin-Polymyxin | Bacitracin/Polymyxin B Sulfate | 12 | 87 | $147.94 | 12 |
(top 25 shown)
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: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20040123000514
OK
5991607574
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
Warren Clinic Inc
6600 S Yale Ave, Tulsa, OK 741363331
Phone: 9184886000
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant - Medical
Physician Assistant (Certified)
Physician Assistant
Physician Assistant (Certified)
Nurse Practitioner
Internal Medicine - Adolescent Medicine
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant
Emergency Medicine
Doctor of Osteopathic Medicine (D.O.)
Career & Practice History
NPI enumerated April 28, 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 Physician Assistants in Tulsa
- Palak Patel, PA-C
- Sean Paquette, PA-C
- Sarah Rayburn, PA-C
- Adrianne Wolfe, PA-C
- Claire Kifer
- Virginia Corcoran
Mailing Address
6600 S Yale Ave, Suite 1400
Tulsa, OK 741363347
Phone: 9184886001