Matthew Howlett, MD
NPI 1649039066 · Vascular & Interventional Radiology Physician · San Francisco, CA
Matthew Howlett, MD is a Vascular & Interventional Radiology Physician provider in San Francisco, CA (NPI 1649039066).
Provider details
- NPI number
- 1649039066
- Entity type
- Individual
- Primary specialty
- Vascular & Interventional Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2087584 (CA)
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
2 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2024-03-18
- Last updated
- 2025-08-14
- Certified
- 2025-08-14
Frequently asked questions
- What is Matthew Howlett's NPI number?
- Matthew Howlett's National Provider Identifier (NPI) is 1649039066, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Howlett's specialty?
- Matthew Howlett is listed in the NPPES registry with a primary specialty of Vascular & Interventional Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Howlett located?
- Matthew Howlett's practice location on file with NPPES is 400 Parnassus Ave, San Francisco, CA 94143-2202.
- What is Matthew Howlett's phone number?
- The practice phone number listed in the NPPES registry for Matthew Howlett is (415) 476-1000.
- Is Matthew Howlett's NPI active?
- Yes — Matthew Howlett's NPI (1649039066) is active in the NPPES registry as of the last update on 2025-08-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.