William Christian Grillo , PA-C
Physician Assistant โข Duluth, MN
400 E 3rd St
Duluth, MN 558051951
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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William Grillo is listed in NPPES under Physician Assistant.
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NPI assigned on December 3, 2021; this date does not establish years in practice.
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Published CMS data list 1,768 Original Medicare Part B services in 2023.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023. Published rows only; this is not a quality measure.
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Published Part B service records, 2023:
- J7325 โ Hyaluronan or derivative, synvisc or synvisc-one, for intra-articular injection, 1 mg: 1,248 service units.
- 20610 โ Aspiration and/or injection of fluid from large joint: 117 service units.
- J1040 โ Injection, methylprednisolone acetate, 80 mg: 110 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2022 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2023). CPT notice
See all 10 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 376 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:
- Oxycodone Hcl โ 91 prescription fills, including refills.
- Ondansetron Odt (Ondansetron) โ 71 prescription fills, including refills.
- Hydromorphone Hcl โ 67 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 all 8 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 65% of clinicians listed under Physician Assistant in Duluth, MN (2024, 114 clinicians with data). Median for this group: 154. Middle half: 52 to 599.
More Part D prescriptions than 60% of clinicians listed under Physician Assistant in Minnesota (2024, 2,421 clinicians with data). Median for this group: 226. Middle half: 71 to 825.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 1,602 in 2022 to 1,768 in 2023.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022โ2023.
Practice Location & Contact Primary Location
400 E 3rd St
Duluth, MN 558051951
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 6 distinct group names: Grand Itasca Clinic And Hospital; Orthopedic Associates Of Duluth Pa; Polinsky Medical Rehabilitation Center and 3 more. 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
2021
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $38,232 in 2023
The total amount Medicare approved for these services in 2023. 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, 2023.
Paid by Medicare
About $27,876 in 2023
The part of the Medicare-allowed amount that Medicare itself paid in 2023, 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, 2023.
30-day fills
376 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
$1,988 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.
Open Payments general payments, program year 2025
All general payments: $2,653.27 across 23 records.
By nature of payment
- Travel and Lodging: $1,368.93 across 7 records.
- Food and Beverage: $1,284.34 across 16 records.
Reporting-company totals (3 largest of 4)
- Foundation Medical, LLC: $995.68 across 8 records.
- Smith+Nephew, Inc.: $779.18 across 6 records.
- Arthrex, Inc.: $748.40 across 7 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
5 years (graduated 2021)
CMS Doctors and Clinicians data list 2021 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
2021
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, โDoes your provider accept Medicare as full payment?โ
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)
William Grillo 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 William Grillo 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 Duluth and Minnesota
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 65% of clinicians listed under Physician Assistant in Duluth, MN (2024, 114 clinicians with data). Median for this group: 154. Middle half: 52 to 599.
More Part D prescriptions than 60% of clinicians listed under Physician Assistant in Minnesota (2024, 2,421 clinicians with data). Median for this group: 226. Middle half: 71 to 825.
Part D drug cost
Close to the middle for clinicians listed under Physician Assistant in Duluth, MN (2024, 114 clinicians with data). Median for this group: $1,850. Middle half: $346 to $53,975.
Close to the middle for clinicians listed under Physician Assistant in Minnesota (2024, 2,421 clinicians with data). Median for this group: $3,260. Middle half: $590 to $83,279.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for William Grillo are from 2023.
179 active clinicians are listed under Physician Assistant with a practice address in Duluth, MN (4,007 in Minnesota).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Duluth
16.8% of these 179 clinicians have the CMS telehealth indicator.
81% of these 179 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 10% from 1,602 in 2022 to 1,768 in 2023.
- 2022: 1,602
- 2023: 1,768
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Medicare-allowed amount
Medicare-allowed amount stayed about the same: $39,665 in 2022 and $38,232 in 2023.
- 2022: $39,665
- 2023: $38,232
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Paid by Medicare
Paid by Medicare stayed about the same: $30,173 in 2022 and $27,876 in 2023.
- 2022: $30,173
- 2023: $27,876
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 44% from 261 in 2022 to 376 in 2024.
- 2022: 261
- 2023: 512
- 2024: 376
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30-day fills
30-day fills increased 44% from 261 in 2022 to 376 in 2024.
- 2022: 261
- 2023: 520
- 2024: 376
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Part D drug cost
Part D drug cost increased 29% from $1,544 in 2022 to $1,988 in 2024.
- 2022: $1,544
- 2023: $2,931
- 2024: $1,988
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $136.64 in 2022 to $2,653.27 in 2025.
- 2022: $136.64
- 2023: $70.36
- 2024: $614.55
- 2025: $2,653.27
Sources: CMS Medicare Physician & Other Practitioners (2023), 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): 23 records totaling $2,653.27.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Foundation Medical, LLC |
Travel and Lodging
In-kind items and services
|
โ | General | $620.29 |
| Arthrex, Inc. |
Travel and Lodging
In-kind items and services
|
โ | General | $244.20 |
| Arthrex, Inc. |
Travel and Lodging
In-kind items and services
|
โ | General | $244.20 |
| Smith+Nephew, Inc. |
Travel and Lodging
In-kind items and services
|
SPATIAL FRAME | General | $232.25 |
| Smith+Nephew, Inc. |
Food and Beverage
In-kind items and services
|
SPATIAL FRAME | General | $189.57 |
| Smith+Nephew, Inc. |
Food and Beverage
In-kind items and services
|
SPATIAL FRAME | General | $170.00 |
| Foundation Medical, LLC |
Food and Beverage
In-kind items and services
|
โ | General | $150.00 |
| Foundation Medical, LLC |
Food and Beverage
In-kind items and services
|
โ | General | $120.73 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
MAKO | General | $106.37 |
| Smith+Nephew, Inc. |
Food and Beverage
In-kind items and services
|
SPATIAL FRAME | General | $102.50 |
| Smith+Nephew, Inc. |
Food and Beverage
In-kind items and services
|
SPATIAL FRAME | General | $79.86 |
| Arthrex, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $75.00 |
| Arthrex, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $65.00 |
| Arthrex, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $65.00 |
| Foundation Medical, LLC |
Food and Beverage
In-kind items and services
|
โ | General | $40.23 |
| Foundation Medical, LLC |
Food and Beverage
In-kind items and services
|
โ | General | $31.05 |
| Arthrex, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $30.00 |
| Arthrex, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $25.00 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
FLOWPORT | General | $23.64 |
| Foundation Medical, LLC |
Travel and Lodging
In-kind items and services
|
โ | General | $18.00 |
| Foundation Medical, LLC |
Food and Beverage
In-kind items and services
|
โ | General | $10.39 |
| Smith+Nephew, Inc. |
Travel and Lodging
In-kind items and services
|
SPATIAL FRAME | General | $5.00 |
| Foundation Medical, LLC |
Travel and Lodging
In-kind items and services
|
โ | General | $4.99 |
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 2021โ2022 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, 2022โ2023; 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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J7325
Hyaluronan or derivative, synvisc or synvisc-one, for intra-articular injection, 1 mg
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1,248 | 19 | $22.00 | $9.49 |
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20610
Aspiration and/or injection of fluid from large joint
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117 | 92 | $277.39 | $57.93 |
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J1040
Injection, methylprednisolone acetate, 80 mg
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110 | 76 | $23.00 | $11.89 |
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73562
X-ray of knee, 3 views
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87 | 71 | $138.92 | $34.22 |
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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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83 | 76 | $300.95 | $74.80 |
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73502
X-ray of hip, 2-3 views
|
52 | 43 | $159.69 | $40.26 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
|
30 | 30 | $186.00 | $46.37 |
|
27447
Replacement of knee joint, both sides of knee
|
15 | 15 | $4934.49 | $163.28 |
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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
|
15 | 15 | $403.00 | $92.46 |
|
27130
Replacement of thigh bone and hip joint with prosthesis
|
11 | 11 | $4915.19 | $163.33 |
Source: CMS Part B by Provider and Service, 2023; 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 |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 91 | 386 | $276.47 | 76 |
| Ondansetron Odt | Ondansetron | 71 | 353 | $516.00 | 70 |
| Hydromorphone Hcl | Hydromorphone Hcl | 67 | 250 | $255.76 | 50 |
| Celecoxib | Celecoxib | 49 | 774 | $456.41 | 42 |
| Cefadroxil | Cefadroxil | 46 | 325 | $287.61 | 45 |
| Hydroxyzine Hcl | Hydroxyzine Hcl | 23 | 130 | $54.80 | 22 |
| Cephalexin | Cephalexin | 18 | 68 | $100.43 | 13 |
| Meloxicam | Meloxicam | 11 | 295 | $40.14 | โ |
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: 2023-11-21NUCC 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
I20240329000181
WI
1759772932
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
Range Regional Health Services
750 E 34th St, Hibbing, MN 557462341
Phone: 2182624881
Polinsky Medical Rehabilitation Center
1600 Miller Trunk Hwy, Duluth, MN 558115640
Phone: 2187865360
Orthopedic Associates Of Duluth Pa
1405 Progress Pkwy, Virginia, MN 557923068
Phone: 2187225513
Orthopedic Associates Of Duluth Pa
1000 E 1st St, Duluth, MN 558052297
Phone: 2187225513
Polinsky Medical Rehabilitation Center
1600 Miller Trunk Hwy, Duluth, MN 558115640
Phone: 2187865360
The Duluth Clinic Ltd
502 E 2nd St, Duluth, MN 558051913
Phone: 2187868364
The Duluth Clinic Ltd
400 E 3rd St, Duluth, MN 558051951
Phone: 2187868364
The Duluth Clinic Ltd
402 E 2nd St, Duluth, MN 558051906
Phone: 2187864000
The Duluth Clinic Ltd
530 E 2nd St, Duluth, MN 558051913
Phone: 2187868364
St Marys Hospital Of Superior
3500 Tower Ave, Superior, WI 548805335
Phone: 7153955454
Grand Itasca Clinic And Hospital
1601 Goldf Course Rd, Grand Rapids, MN 557448648
Phone: 2183263401
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
Physician Assistant
Psychiatry & Neurology - Neurology
Doctor of Osteopathic Medicine (D.O.)
Nurse Practitioner - Family
Advanced Practice Registered Nurse, Certified Nurse Practitioner
Physician Assistant
Physician Assistant (Certified)
Family Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 400 E 3RD ST, DULUTH, MN 558051951 (Tel: 2187868364)
Registered at 400 E 3RD ST, DULUTH, MN 558051951 (Tel: 2187868364)
Physician Assistant (license number reported to NPPES: MN 13889)
NPI status registered as active in NPPES database
Registered at 3580 ARCADE ST STE 100, VADNAIS HEIGHTS, MN 551277135 (Tel: 6519685200)
Registered at 710 COMMERCE DR STE 200, WOODBURY, MN 551254925 (Tel: 6519685200)
Recorded as WILLIAM GRILLO, PA-C
Physician Assistant (license number reported to NPPES: MN 13889)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Duluth
- Deanna Hughes
- Kadi Weyandt, PA-C
- Matthew Baertlein
- Mariah Christensen, PA-C
- Thomas Warden
- Carrie Hammes
Mailing Address
400 E 3rd St
Duluth, MN 558051951
Phone: 2187868364