Mark Chag, M.D.
NPI 1336179878 · Obstetrics & Gynecology Physician · Portsmouth, NH
Mark Chag, M.D. is a Obstetrics & Gynecology Physician provider in Portsmouth, NH (NPI 1336179878).
Provider details
- NPI number
- 1336179878
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 6723 (NH)
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
- 2006-07-03
- Last updated
- 2023-03-07
Frequently asked questions
- What is Mark Chag's NPI number?
- Mark Chag's National Provider Identifier (NPI) is 1336179878, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Chag's specialty?
- Mark Chag is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Chag located?
- Mark Chag's practice location on file with NPPES is Harbour Women'S Health, Portsmouth, NH 03801-4125.
- What is Mark Chag's phone number?
- The practice phone number listed in the NPPES registry for Mark Chag is (603) 431-6011.
- Is Mark Chag's NPI active?
- Yes — Mark Chag's NPI (1336179878) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.