John Masserant, MD
NPI 1669454146 · Obstetrics & Gynecology Physician · Monroe, MI
John Masserant, MD is a Obstetrics & Gynecology Physician provider in Monroe, MI (NPI 1669454146).
Provider details
- NPI number
- 1669454146
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- JM076801 (MI)
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
- 2005-11-18
- Last updated
- 2007-07-16
Frequently asked questions
- What is John Masserant's NPI number?
- John Masserant's National Provider Identifier (NPI) is 1669454146, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Masserant's specialty?
- John Masserant is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is John Masserant located?
- John Masserant's practice location on file with NPPES is 1046 N Monroe St, Monroe, MI 48162-3113.
- What is John Masserant's phone number?
- The practice phone number listed in the NPPES registry for John Masserant is (734) 457-9034.
- Is John Masserant's NPI active?
- Yes — John Masserant's NPI (1669454146) is active in the NPPES registry as of the last update on 2007-07-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.