John Koh, MD
NPI 1841283009 · Obstetrics & Gynecology Physician · Simi Valley, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Koh, MD is a Obstetrics & Gynecology Physician provider in Simi Valley, CA (NPI 1841283009).
Provider details
- NPI number
- 1841283009
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A31915 (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
20 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
- 2005-08-23
- Last updated
- 2012-06-27
Frequently asked questions
- What is John Koh's NPI number?
- John Koh's National Provider Identifier (NPI) is 1841283009, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Koh's specialty?
- John Koh is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is John Koh located?
- John Koh's practice location on file with NPPES is 1147 Red Tail Way, Simi Valley, CA 93065-7232.
- What is John Koh's phone number?
- The practice phone number listed in the NPPES registry for John Koh is (805) 527-8055.
- Does John Koh accept Medicare?
- John Koh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Koh's NPI active?
- Yes — John Koh's NPI (1841283009) is active in the NPPES registry as of the last update on 2012-06-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.