Physician Profile
Unclaimed ProfileAbout GRENNAN
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Areas of Expertise
Common questions
What kind of doctor is Dr. Grennan?
Dr. Grennan is a physician assistant in Gig Harbor, WA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “Physician Assistant”.
NPI registry
What is Dr. Grennan's address?
Dr. Grennan is listed at 4779 POINT FOSDICK DR STE 500, Gig Harbor, WA 98335. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Grennan?
The number on file is (253) 530-8460. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Grennan?
Dr. Grennan's National Provider Identifier is 1669829933. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How much experience does Dr. Grennan have?
Dr. Grennan has 10+ years experience. Registered with an NPI since 2016. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practised for longer than this.
NPI registry
What procedures does Dr. Grennan perform?
According to Medicare billing data, Dr. Grennan provides treatments such as injection of drug or substance under skin or into muscle, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Grennan's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Grennan. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (253) 530-8460
- Email not available
Practice Locations
4779 POINT FOSDICK DR STE 500
Gig Harbor, WA 98335
Procedures Most Often Billed to Medicare
409 services · 408 patients · 7 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
21 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
187 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
91 |
| 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 | Lab test | 87636 |
45 |
| Automated urinalysis test | Lab test | 81003 |
28 |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
26 |
| Detection test by nucleic acid for strep (streptococcus, group a), amplified probe technique | Lab test | 87651 |
11 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other physician assistants in Gig Harbor 8
Same specialty, same city.
Also performs Injection of drug or substance under skin or into muscle 8
Providers in WA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.