Mark Ewing, MD
NPI 1023166816 · Gastroenterology Physician · Woodland Hills, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Ewing, MD is a Gastroenterology Physician provider in Woodland Hills, CA (NPI 1023166816).
Provider details
- NPI number
- 1023166816
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A74992 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 311 | 290 |
| Omeprazole | 140 | 61 |
| Mesalamine | 121 | 37 |
| Pantoprazole Sodium | 76 | 29 |
| Plecanatidebrand: Trulance | 51 | 18 |
| Ursodiol | 33 | — |
| Lipase/Protease/Amylasebrand: Zenpep | 25 | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-08
- Last updated
- 2021-11-30
Frequently asked questions
- What is Mark Ewing's NPI number?
- Mark Ewing's National Provider Identifier (NPI) is 1023166816, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Ewing's specialty?
- Mark Ewing is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Ewing located?
- Mark Ewing's practice location on file with NPPES is 5601 De Soto Ave, Woodland Hills, CA 91367-6701.
- What is Mark Ewing's phone number?
- The practice phone number listed in the NPPES registry for Mark Ewing is (818) 719-2000.
- Does Mark Ewing accept Medicare?
- Mark Ewing is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Ewing's NPI active?
- Yes — Mark Ewing's NPI (1023166816) is active in the NPPES registry as of the last update on 2021-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.