Joseph Merrill
NPI 1235215013 · Internal Medicine Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Merrill is a Internal Medicine Physician provider in Seattle, WA (NPI 1235215013).
Provider details
- NPI number
- 1235215013
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- MD00033580 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
124 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 52 | $106 |
| 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 | 40 | $18 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 32 | $72 |
Typical Medicare-allowed amounts for these services range $18–$106 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 53 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 90 | 14 |
| Rosuvastatin Calcium | 78 | 18 |
| Buprenorphine Hcl/Naloxone Hclbrand: Buprenorphine-Naloxone | 75 | 11 |
| Oxycodone Hcl | 70 | — |
| Dolutegravir Sodiumbrand: Tivicay | 65 | — |
| Emtricitabine/Tenofov Alafenambrand: Descovy | 64 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-27
- Last updated
- 2012-01-05
Frequently asked questions
- What is Joseph Merrill's NPI number?
- Joseph Merrill's National Provider Identifier (NPI) is 1235215013, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Merrill's specialty?
- Joseph Merrill is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Merrill located?
- Joseph Merrill's practice location on file with NPPES is 325 9th Ave, Seattle, WA 98104-2499.
- What is Joseph Merrill's phone number?
- The practice phone number listed in the NPPES registry for Joseph Merrill is (206) 744-3000.
- Does Joseph Merrill accept Medicare?
- Joseph Merrill is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Merrill's NPI active?
- Yes — Joseph Merrill's NPI (1235215013) is active in the NPPES registry as of the last update on 2012-01-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.