Ellen Masse, M.D.
NPI 1922358308 · Internal Medicine Physician · Woodland Hills, CA
Ellen Masse, M.D. is a Internal Medicine Physician provider in Woodland Hills, CA (NPI 1922358308).
Provider details
- NPI number
- 1922358308
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A22230 (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
13 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
- 2012-09-13
- Last updated
- 2012-09-13
Frequently asked questions
- What is Ellen Masse's NPI number?
- Ellen Masse's National Provider Identifier (NPI) is 1922358308, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ellen Masse's specialty?
- Ellen Masse is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ellen Masse located?
- Ellen Masse's practice location on file with NPPES is 20511 Wells Dr, Woodland Hills, CA 91364-3433.
- What is Ellen Masse's phone number?
- The practice phone number listed in the NPPES registry for Ellen Masse is (818) 800-8808.
- Is Ellen Masse's NPI active?
- Yes — Ellen Masse's NPI (1922358308) is active in the NPPES registry as of the last update on 2012-09-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.