Corey Merrill
Physician Assistant โข Glenview, IL
2401 Ravine Way, Suite 200
Glenview, IL 600257645
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 December 29, 2014; this date does not establish years in practice.
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Published CMS data list 468 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99213 โ Established patient outpatient office visit: 84 service units.
- J3301 โ Injection, triamcinolone acetonide, not otherwise specified, 10 mg: 71 service units.
- 99214 โ Established patient outpatient office visit: 67 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ 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 11 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 109 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Meloxicam โ 76 prescription fills, including refills.
- Ibuprofen โ 18 prescription fills, including refills.
- Oxycodone Hcl โ 15 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ 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 ยท 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 Physician Assistant in Glenview, IL (2024, 21 clinicians with data). Median for this group: 452. Middle half: 163 to 921.
More Medicare Part B services than 70% of clinicians listed under Physician Assistant in Illinois (2024, 2,422 clinicians with data). Median for this group: 212. Middle half: 76 to 548.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 150 in 2020 to 468 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
2401 Ravine Way
Suite 200
Glenview, IL 600257645
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in La Jolla, CA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 3 distinct group names: Eon Care Clinicians Of Ca Pc; Monica Perlman Md Inc; Regents Of The University Of California. 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
2014
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
340 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 โ by Provider, 2024.
Medicare-allowed amount
About $31,115 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 โ by Provider and Service, 2024.
Paid by Medicare
About $22,966 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 โ by Provider and Service, 2024.
30-day fills
109 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
$398 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 โ by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $22.90 in 2025
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2025.
Years since graduation
12 years (graduated 2014)
CMS Doctors and Clinicians data list 2014 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
2014
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.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
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, โDoes your provider accept Medicare as full payment?โ
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)
Corey Merrill 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 Corey Merrill 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 Glenview and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Close to the middle for clinicians listed under Physician Assistant in Glenview, IL (2024, 21 clinicians with data). Median for this group: 452. Middle half: 163 to 921.
More Medicare Part B services than 70% of clinicians listed under Physician Assistant in Illinois (2024, 2,422 clinicians with data). Median for this group: 212. Middle half: 76 to 548.
Medicare-allowed amount
Close to the middle for clinicians listed under Physician Assistant in Glenview, IL (2024, 21 clinicians with data). Median for this group: $30,091. Middle half: $9,989 to $69,924.
A higher Medicare-allowed amount than 70% of clinicians listed under Physician Assistant in Illinois (2024, 2,422 clinicians with data). Median for this group: $16,580. Middle half: $6,650 to $35,717.
Paid by Medicare
Close to the middle for clinicians listed under Physician Assistant in Glenview, IL (2024, 21 clinicians with data). Median for this group: $21,604. Middle half: $7,492 to $54,089.
A higher Medicare payment amount than 70% of clinicians listed under Physician Assistant in Illinois (2024, 2,422 clinicians with data). Median for this group: $12,415. Middle half: $4,894 to $26,472.
Medicare Part D prescriptions
Fewer Part D prescriptions than 65% of clinicians listed under Physician Assistant in Glenview, IL (2024, 20 clinicians with data). Median for this group: 161. Middle half: 87 to 238.
Fewer Part D prescriptions than 65% of clinicians listed under Physician Assistant in Illinois (2024, 2,668 clinicians with data). Median for this group: 203. Middle half: 67 to 595.
Part D drug cost
A lower Part D drug cost than 85% of clinicians listed under Physician Assistant in Glenview, IL (2024, 20 clinicians with data). Median for this group: $1,060. Middle half: $729 to $4,612.
A lower Part D drug cost than 75% of clinicians listed under Physician Assistant in Illinois (2024, 2,668 clinicians with data). Median for this group: $3,018. Middle half: $535 to $48,132.
47 active clinicians are listed under Physician Assistant with a practice address in Glenview, IL (4,929 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Glenview
12.8% of these 47 clinicians have the CMS telehealth indicator.
63.8% of these 47 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 212% from 150 in 2020 to 468 in 2024.
- 2020: 150
- 2021: 197
- 2022: 252
- 2023: 425
- 2024: 468
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Medicare-allowed amount
Medicare-allowed amount increased 272% from $8,361 in 2020 to $31,115 in 2024.
- 2020: $8,361
- 2021: $18,675
- 2022: $22,324
- 2023: $29,050
- 2024: $31,115
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Paid by Medicare
Paid by Medicare increased 258% from $6,406 in 2020 to $22,966 in 2024.
- 2020: $6,406
- 2021: $13,602
- 2022: $16,481
- 2023: $21,279
- 2024: $22,966
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Medicare Part D prescriptions
Medicare Part D prescriptions varied from year to year: 110 in 2020 and 109 in 2024.
- 2020: 110
- 2021: 136
- 2022: 120
- 2023: 170
- 2024: 109
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30-day fills
30-day fills varied from year to year: 111 in 2020 and 109 in 2024.
- 2020: 111
- 2021: 136
- 2022: 120
- 2023: 182
- 2024: 109
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Part D drug cost
Part D drug cost decreased 73% from $1,452 in 2020 to $398 in 2024.
- 2020: $1,452
- 2021: $1,185
- 2022: $1,046
- 2023: $1,219
- 2024: $398
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $32.72 in 2021 to $22.90 in 2025.
- 2021: $32.72
- 2022: $11.66
- 2023: $48.26
- 2024: $30.89
- 2025: $22.90
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 ยท 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 โ December 31, 2025): fewer than 11 records totaling $22.90.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Bioventus LLC |
Food and Beverage
In-kind items and services
|
EXOGEN ULTRASOUND BONE HEALING SYSTEM | General | $22.90 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 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 โ by Provider and Service data, 2017โ2024; 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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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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84 | 77 | $296.01 | $82.15 |
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J3301
Injection, triamcinolone acetonide, not otherwise specified, 10 mg
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71 | 17 | $9.00 | $1.00 |
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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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67 | 63 | $391.07 | $84.10 |
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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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64 | 58 | $344.52 | $57.25 |
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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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58 | 53 | $409.53 | $116.52 |
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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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37 | 37 | $385.59 | $70.71 |
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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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32 | 32 | $401.16 | $101.02 |
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20605
Aspiration and/or injection of fluid from medium joint
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16 | 15 | $220.25 | $31.81 |
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20605
Aspiration and/or injection of fluid from medium joint
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13 | 12 | $225.69 | $50.35 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
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13 | 13 | $313.15 | $30.56 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
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13 | 13 | $189.46 | $52.09 |
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 |
|---|---|---|---|---|---|
| Meloxicam | Meloxicam | 76 | 2,258 | $232.64 | 28 |
| Ibuprofen | Ibuprofen | 18 | 286 | $134.79 | โ |
| Oxycodone Hcl | Oxycodone Hcl | 15 | 51 | $30.20 | 12 |
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
Self-certified to NPPES: 2022-02-10NUCC 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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20200206002548
CA
9234455171
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
Regents Of The University Of California
200 W Arbor Dr, San Diego, CA 921039000
Phone: 8586577000
Monica Perlman Md Inc
3737 Moraga Ave, San Diego, CA 921175352
Phone: 8587990855
Regents Of The University Of California
9400 Campus Point Dr, La Jolla, CA 920931350
Phone: 8586577000
Regents Of The University Of California
9300 Campus Point Dr, La Jolla, CA 920371300
Phone: 8586577000
Monica Perlman Md Inc
4142 Adams Ave, San Diego, CA 921162593
Phone: 8586170717
Regents Of The University Of California
200 W Arbor Dr, San Diego, CA 921031910
Phone: 8586577000
Regents Of The University Of California
9350 Campus Point Dr, La Jolla, CA 920371300
Phone: 8586577000
Regents Of The University Of California
200 W Arbor Dr, San Diego, CA 921039000
Eon Care Clinicians Of Ca Pc
6915 Flanders Dr, San Diego, CA 921212987
Phone: 2407786164
Monica Perlman Md Inc
3900 5th Ave, San Diego, CA 921033122
Phone: 8585541212
Regents Of The University Of California
9415 Campus Point Dr, La Jolla, CA 920931350
Phone: 8586577000
Secondary Practice Locations
9850 Genesee Ave Ste 320
La Jolla, CA 920371208
Phone: 8585541212
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
Doctor of Medicine (M.D.)
Internal Medicine - Rheumatology
Doctor of Medicine (M.D.)
Orthopaedic Surgery - Hand Surgery
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant
Orthopaedic Surgery - Sports Medicine
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant
Career & Practice History
NPI enumerated December 29, 2014.
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 Glenview
- Kam Mueller, PA-C
- Isidora Kafkas, PA-C
- Carmela Sanchez, PA
- Stephanie Peifer, PA-C
- Angelica Marconi Zweig, PA-C
- Abby Betts, PA
Mailing Address
900 Rand Rd, Sutie 300
Des Plaines, IL 600162359
Phone: 8473243976