Robert Butterfield, M.D.
NPI 1831142132 · Internal Medicine Physician · Port Townsend, WA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Butterfield, M.D. is a Internal Medicine Physician provider in Port Townsend, WA (NPI 1831142132).
Provider details
- NPI number
- 1831142132
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD00043773 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 67 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 300 | 86 |
| Lisinopril | 169 | 53 |
| Amlodipine Besylate | 158 | 46 |
| Levothyroxine Sodium | 120 | 39 |
| Losartan Potassium | 119 | 33 |
| Omeprazole | 97 | 32 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-18
- Last updated
- 2011-08-30
Frequently asked questions
- What is Robert Butterfield's NPI number?
- Robert Butterfield's National Provider Identifier (NPI) is 1831142132, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Butterfield's specialty?
- Robert Butterfield is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Butterfield located?
- Robert Butterfield's practice location on file with NPPES is 915 Sheridan St, Port Townsend, WA 98368-2931.
- What is Robert Butterfield's phone number?
- The practice phone number listed in the NPPES registry for Robert Butterfield is (360) 385-4848.
- Does Robert Butterfield accept Medicare?
- Robert Butterfield is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Butterfield's NPI active?
- Yes — Robert Butterfield's NPI (1831142132) is active in the NPPES registry as of the last update on 2011-08-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.