Harold Clark, MD
NPI 1831194745 · Family Medicine Physician · Marysville, WA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Harold Clark, MD is a Family Medicine Physician provider in Marysville, WA (NPI 1831194745).
Provider details
- NPI number
- 1831194745
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD00025335 (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
21 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
169 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 | 70 | $127 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 40 | $89 |
| Hemoglobin A1c Level83036 | 31 | $10 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 28 | $129 |
Typical Medicare-allowed amounts for these services range $10–$129 (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 · 101 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 225 | 81 |
| Semaglutidebrand: Ozempic | 175 | 29 |
| Oxycodone Hcl | 151 | 28 |
| Levothyroxine Sodium | 146 | 51 |
| Tamsulosin Hcl | 140 | 47 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 130 | 24 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-16
- Last updated
- 2011-01-25
Frequently asked questions
- What is Harold Clark's NPI number?
- Harold Clark's National Provider Identifier (NPI) is 1831194745, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harold Clark's specialty?
- Harold Clark is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Harold Clark located?
- Harold Clark's practice location on file with NPPES is 4404 80th St Ne, Marysville, WA 98270-3427.
- What is Harold Clark's phone number?
- The practice phone number listed in the NPPES registry for Harold Clark is (360) 659-1231.
- Does Harold Clark accept Medicare?
- Harold Clark is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Harold Clark's NPI active?
- Yes — Harold Clark's NPI (1831194745) is active in the NPPES registry as of the last update on 2011-01-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.