John Hamilton Addison, MD
Geriatric Medicine · Internal Medicine (CMS) · Mercer Island, WA
At a glance
9725 Se 36Th St Ste 214, Mercer Island, WA 98040-3840
NPPES record updated Sep 27, 2024. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
9725 Se 36Th St Ste 214Mercer Island, WA 98040-3840
Additional reported practice locations
5495 Arapahoe Ave Ste 100GBoulder, CO 803031224
Phone: 3034154246
Fax: 3034158407 2101 Ken Pratt Blvd Ste 104G
Longmont, CO 805016568
Phone: 3034154246
Fax: 3034158407
Education & affiliations
- Medical / professional school
- University Of Washington School Of Medicine
- Graduation year
- 1979
- CMS specialties
- Geriatric Medicine · Internal Medicine
CMS reports telehealth services for this clinician. Confirm current services and availability with the practice.
Practice groups
Reported hospital affiliations
- Boulder Community Health Boulder, CO
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Geriatric Medicine · Internal Medicine (CMS)
- Taxonomy code
- 207RG0300X
- Enumeration date
- May 16, 2006
- Record updated
- Sep 27, 2024
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD
Reported taxonomies and licenses
207R00000X
License reported: DR.0072381 CO
207RG0300X · Primary
License reported: MD00018359 WA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
9725 Se 36Th St Ste 214Mercer Island, WA 98040-3840
- Phone
- (206) 275-3588
- Fax
- (206) 275-2073
Mailing address
PO BOX 1526MERCER ISLAND, WA 980401526
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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