John Yen, M.D.
NPI 1255350658 · Neurological Surgery Physician · Sacramento, CA
John Yen, M.D. is a Neurological Surgery Physician provider in Sacramento, CA (NPI 1255350658).
Provider details
- NPI number
- 1255350658
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G19310 (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
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
- 2006-07-18
- Last updated
- 2008-02-21
Frequently asked questions
- What is John Yen's NPI number?
- John Yen's National Provider Identifier (NPI) is 1255350658, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Yen's specialty?
- John Yen is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is John Yen located?
- John Yen's practice location on file with NPPES is 3939 J St, Sacramento, CA 95819-3631.
- What is John Yen's phone number?
- The practice phone number listed in the NPPES registry for John Yen is (916) 453-0911.
- Is John Yen's NPI active?
- Yes — John Yen's NPI (1255350658) is active in the NPPES registry as of the last update on 2008-02-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.