John Addison, MD
NPI 1659323087 · Geriatric Medicine (Internal Medicine) Physician · Mercer Island, WA
Enrolled with Medicare as Practitioner - Geriatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Addison, MD is a Geriatric Medicine (Internal Medicine) Physician provider in Mercer Island, WA (NPI 1659323087).
Provider details
- NPI number
- 1659323087
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- DR.0072381 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
243 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 88 | $16 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 64 | $181 |
| Residence Visit for Established Patient With High Level of Medical Decision Making, Per Day, If Using Time, at Least 60 Minutes99350 | 38 | $192 |
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 25 | $134 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 14 | $221 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 47 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 74 | — |
| Trazodone Hcl | 66 | — |
| Levothyroxine Sodium | 64 | 11 |
| Duloxetine Hcl | 47 | — |
| Metoprolol Succinate | 46 | — |
| Atorvastatin Calcium | 43 | 12 |
| Pantoprazole Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$112 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 5495 Arapahoe Ave Ste 100gBoulder, CO 80303-1224Phone: (303) 415-4246Fax: (303) 415-8407
- 2101 Ken Pratt Blvd Ste 104gLongmont, CO 80501-6568Phone: (303) 415-4246Fax: (303) 415-8407
Registry dates
- Enumerated
- 2006-05-16
- Last updated
- 2024-09-27
- Certified
- 2024-09-27
Frequently asked questions
- What is John Addison's NPI number?
- John Addison's National Provider Identifier (NPI) is 1659323087, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Addison's specialty?
- John Addison is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is John Addison located?
- John Addison's practice location on file with NPPES is 9725 Se 36th St Ste 214, Mercer Island, WA 98040-3840.
- What is John Addison's phone number?
- The practice phone number listed in the NPPES registry for John Addison is (206) 275-3588.
- Does John Addison accept Medicare?
- John Addison is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Addison's NPI active?
- Yes — John Addison's NPI (1659323087) is active in the NPPES registry as of the last update on 2024-09-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.