Harold Bigger, M.D.
NPI 1801821640 · Neonatal-Perinatal Medicine Physician · Chicago, IL
Harold Bigger, M.D. is a Neonatal-Perinatal Medicine Physician provider in Chicago, IL (NPI 1801821640).
Provider details
- NPI number
- 1801821640
- Entity type
- Individual
- Primary specialty
- Neonatal-Perinatal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
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
83% 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
- 2006-07-11
- Last updated
- 2007-07-08
Frequently asked questions
- What is Harold Bigger's NPI number?
- Harold Bigger's National Provider Identifier (NPI) is 1801821640, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harold Bigger's specialty?
- Harold Bigger is listed in the NPPES registry with a primary specialty of Neonatal-Perinatal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Harold Bigger located?
- Harold Bigger's practice location on file with NPPES is 1653 W Congress Pkwy, Chicago, IL 60612-3833.
- What is Harold Bigger's phone number?
- The practice phone number listed in the NPPES registry for Harold Bigger is (312) 942-7154.
- Is Harold Bigger's NPI active?
- Yes — Harold Bigger's NPI (1801821640) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.