Michael Dwyer Grennan
Physician Assistant • Gig Harbor, WA
4779 Point Fosdick Dr Ste 500
Gig Harbor, WA 983352318
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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Michael Grennan is listed in NPPES under Physician Assistant.
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NPI assigned on May 17, 2016; this date does not establish years in practice.
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Published CMS data list 409 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:
- 99213 — Established patient outpatient office visit: 187 service units.
- 99203 — New patient outpatient office visit: 91 service units.
- 87636 — Detection test by multiplex amplified probe technique for severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (covid-19) and influenza virus types a and b: 45 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 7 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 269 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:
- Amoxicillin — 64 prescription fills, including refills.
- Prednisone — 59 prescription fills, including refills.
- Cephalexin — 33 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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Fewer Medicare Part B services than 80% of clinicians listed under Physician Assistant in Gig Harbor, WA (2024, 17 clinicians with data). Median for this group: 858. Middle half: 465 to 2,116.
More Medicare Part B services than 70% of clinicians listed under Physician Assistant in Washington (2024, 1,707 clinicians with data). Median for this group: 218. Middle half: 77 to 474.
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 491 in 2023 to 409 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2023–2024.
Practice Location & Contact Primary Location
4779 Point Fosdick Dr Ste 500
Gig Harbor, WA 983352318
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
313 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 $31,141 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 $20,878 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
269 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
$2,336 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021–2025.
NPI first issued
2016
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Gig Harbor and Washington
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 80% of clinicians listed under Physician Assistant in Gig Harbor, WA (2024, 17 clinicians with data). Median for this group: 858. Middle half: 465 to 2,116.
More Medicare Part B services than 70% of clinicians listed under Physician Assistant in Washington (2024, 1,707 clinicians with data). Median for this group: 218. Middle half: 77 to 474.
Medicare-allowed amount
A lower Medicare-allowed amount than 80% of clinicians listed under Physician Assistant in Gig Harbor, WA (2024, 17 clinicians with data). Median for this group: $49,426. Middle half: $34,650 to $90,848.
A higher Medicare-allowed amount than 70% of clinicians listed under Physician Assistant in Washington (2024, 1,707 clinicians with data). Median for this group: $16,952. Middle half: $6,879 to $34,613.
Paid by Medicare
A lower Medicare payment amount than 80% of clinicians listed under Physician Assistant in Gig Harbor, WA (2024, 17 clinicians with data). Median for this group: $33,714. Middle half: $24,060 to $61,445.
A higher Medicare payment amount than 65% of clinicians listed under Physician Assistant in Washington (2024, 1,707 clinicians with data). Median for this group: $12,488. Middle half: $4,857 to $25,122.
Medicare Part D prescriptions
Fewer Part D prescriptions than 60% of clinicians listed under Physician Assistant in Gig Harbor, WA (2024, 17 clinicians with data). Median for this group: 318. Middle half: 99 to 1,256.
Close to the middle for clinicians listed under Physician Assistant in Washington (2024, 2,001 clinicians with data). Median for this group: 244. Middle half: 75 to 797.
Part D drug cost
A lower Part D drug cost than 65% of clinicians listed under Physician Assistant in Gig Harbor, WA (2024, 17 clinicians with data). Median for this group: $6,298. Middle half: $2,061 to $112,586.
Close to the middle for clinicians listed under Physician Assistant in Washington (2024, 2,001 clinicians with data). Median for this group: $4,328. Middle half: $751 to $64,764.
25 active clinicians are listed under Physician Assistant with a practice address in Gig Harbor, WA (3,718 in Washington).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Gig Harbor
32% of these 25 clinicians have the CMS telehealth indicator.
68% of these 25 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 decreased 17% from 491 in 2023 to 409 in 2024.
- 2023: 491
- 2024: 409
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Medicare-allowed amount
Medicare-allowed amount stayed about the same: $34,108 in 2023 and $31,141 in 2024.
- 2023: $34,108
- 2024: $31,141
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Paid by Medicare
Paid by Medicare decreased 16% from $24,955 in 2023 to $20,878 in 2024.
- 2023: $24,955
- 2024: $20,878
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Medicare Part D prescriptions
Medicare Part D prescriptions varied from year to year: 277 in 2020 and 269 in 2024.
- 2020: 277
- 2021: 190
- 2022: 140
- 2023: 438
- 2024: 269
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30-day fills
30-day fills decreased 40% from 449 in 2020 to 269 in 2024.
- 2020: 449
- 2021: 291
- 2022: 209
- 2023: 439
- 2024: 269
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Part D drug cost
Part D drug cost decreased 51% from $4,737 in 2020 to $2,336 in 2024.
- 2020: $4,737
- 2021: $4,156
- 2022: $3,862
- 2023: $5,209
- 2024: $2,336
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2022–2023 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, 2023–2024; 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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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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187 | 186 | $280.00 | $76.34 |
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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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91 | 91 | $302.00 | $94.77 |
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87636
Detection test by multiplex amplified probe technique for severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (covid-19) and influenza virus types a and b
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45 | 45 | $317.00 | $139.78 |
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81003
Automated urinalysis test
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28 | 28 | $5.00 | $2.20 |
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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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26 | 26 | $265.00 | $48.25 |
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96372
Injection of drug or substance under skin or into muscle
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21 | 21 | $56.00 | $12.25 |
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87651
Detection test by nucleic acid for strep (streptococcus, group a), amplified probe technique
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11 | 11 | $78.00 | $34.39 |
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 |
|---|---|---|---|---|---|
| Amoxicillin | Amoxicillin | 64 | 640 | $257.15 | 64 |
| Prednisone | Prednisone | 59 | 295 | $111.18 | 59 |
| Cephalexin | Cephalexin | 33 | 330 | $424.96 | 32 |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 33 | 241 | $496.67 | 33 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 28 | 470 | $627.55 | 28 |
| Azithromycin | Azithromycin | 20 | 100 | $103.58 | 20 |
| Ibuprofen | Ibuprofen | 19 | 570 | $199.65 | 19 |
| Fluticasone Propionate | Fluticasone Propionate | 13 | 390 | $114.99 | 13 |
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: 2023-02-01NUCC 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.
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 4779 POINT FOSDICK DR STE 500, GIG HARBOR, WA 983352318 (Tel: 2535308460)
Registered at PO BOX 5299, MS: 820-5-PCO, TACOMA, WA 984150299 (Tel: 2534598009)
NPI status registered as active in NPPES database
Registered at 19917 7TH AVE NE, POULSBO, WA 983706555 (Tel: 3603773776)
Registered at PO BOX 960, BREMERTON, WA 983370212 (Tel: 3604782366)
Recorded as MICHAEL GRENNAN
Physician Assistant (license number reported to NPPES: WA PA60805134)
NPI status registered as active in NPPES database
Registered at 4311 11TH AVE NE, SUITE 200, SEATTLE, WA 981056366 (Tel: 2066164001)
Registered at 4311 11TH AVE NE, SUITE 200, SEATTLE, WA 981056366 (Tel: 2066164001)
Recorded as MICHAEL GRENNAN
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Gig Harbor
- Juliene Bottom, PA-C
- Kerry Scarvie, PA
- Samantha Sokol, PA-C
- Rachel Sammis-Falk, PA-C
- Christie Heany, PA
- Breanne Murray, PA-C
Mailing Address
Po Box 5299, Ms: 820-5-Pco
Tacoma, WA 984150299
Phone: 2534598009