John Massey, MD
NPI 1619003415 · Pain Medicine (Anesthesiology) Physician · Los Gatos, CA
John Massey, MD is a Pain Medicine (Anesthesiology) Physician provider in Los Gatos, CA (NPI 1619003415).
Provider details
- NPI number
- 1619003415
- Entity type
- Individual
- Primary specialty
- Pain Medicine (Anesthesiology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G76734 (CA)
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 tenure38% of score
19 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
- 2007-02-26
- Last updated
- 2009-03-19
Frequently asked questions
- What is John Massey's NPI number?
- John Massey's National Provider Identifier (NPI) is 1619003415, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Massey's specialty?
- John Massey is listed in the NPPES registry with a primary specialty of Pain Medicine (Anesthesiology) Physician (Allopathic & Osteopathic Physicians).
- Where is John Massey located?
- John Massey's practice location on file with NPPES is 15047 Los Gatos Blvd, Los Gatos, CA 95032-2054.
- What is John Massey's phone number?
- The practice phone number listed in the NPPES registry for John Massey is (408) 364-6799.
- Is John Massey's NPI active?
- Yes — John Massey's NPI (1619003415) is active in the NPPES registry as of the last update on 2009-03-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.