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Fiona Gruzmark, MD
NPI 1396544961 · Internal Medicine Physician · Chicago, IL
Fiona Gruzmark, MD is a Internal Medicine Physician provider in Chicago, IL (NPI 1396544961).
Provider details
- NPI number
- 1396544961
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 125.087522 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Established profile(55/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr 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
820 S Wood St
Chicago, IL 60612-4325
Phone: (312) 996-2933
Street-level locationGet directions
Mailing address
820 S Wood St Ste 100
Chicago, IL 60612-4325
Registry dates
- Enumerated
- 2025-03-07
- Last updated
- 2026-05-30
- Certified
- 2026-05-30
Frequently asked questions
- What is Fiona Gruzmark's NPI number?
- Fiona Gruzmark's National Provider Identifier (NPI) is 1396544961, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Fiona Gruzmark's specialty?
- Fiona Gruzmark is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Fiona Gruzmark located?
- Fiona Gruzmark's practice location on file with NPPES is 820 S Wood St, Chicago, IL 60612-4325.
- What is Fiona Gruzmark's phone number?
- The practice phone number listed in the NPPES registry for Fiona Gruzmark is (312) 996-2933.
- Is Fiona Gruzmark's NPI active?
- Yes — Fiona Gruzmark's NPI (1396544961) is active in the NPPES registry as of the last update on 2026-05-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.